mcp1633 automotive tail light reference design

2020 Microchip Technology Inc. DS50002920A

MCP1633Automotive Tail Light

Reference Design

DS50002920A-page 2 2020 Microchip Technology Inc.

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MCP1633AUTOMOTIVE TAIL LIGHT

REFERENCE DESIGN

Table of Contents

Preface ........................................................................................................................... 5

Chapter 1. Product Overview1.1 Introduction ..................................................................................................... 9

1.2 MCP1633 Automotive Tail Light Reference Design Overview ....................... 9

1.3 MCP1633 Automotive Tail Light Reference Design Features ...................... 10

1.4 Device Summary .......................................................................................... 10

1.5 Technical Specifications ............................................................................... 11

1.6 Functional Description .................................................................................. 12

1.7 What the MCP1633 Automotive Tail Light Reference Design Kit Contains ............................................................................................ 13

Chapter 2. Installation and Operation2.1 Getting Started ............................................................................................. 15

2.1.1 Necessary Instruments and Tools ............................................................. 15

2.1.2 Setup Procedure ....................................................................................... 15

2.1.3 Board Testing ............................................................................................ 16

2.2 Evaluating the Application ............................................................................ 172.3 Firmware Description ................................................................................... 17

Chapter 3. Connectivity via Bluetooth3.1 Introduction ................................................................................................... 193.2 Installing the Android Application ................................................................. 193.3 Application Interface ..................................................................................... 19

3.3.1 Starting the Application ............................................................................. 19

3.3.2 Connecting to a Bluetooth Device ............................................................. 20

3.3.3 Using the MCP1633 Automotive Tail Light Reference Design Android Application ................................................................................ 21

Appendix A. Schematics and LayoutsA.1 Introduction .................................................................................................. 23

A.2 Schematic – REVERSE Block ..................................................................... 24

A.3 Schematic – FOG Block ............................................................................... 25

A.4 Schematic – TURN Block ............................................................................ 26

A.5 Schematic – BRAKE/POS Block .................................................................. 27

A.6 Schematic – MCU ........................................................................................ 28

A.7 Schematic – Bluetooth Connectivity ............................................................ 29

A.8 Board – Top Silk ......................................................................................... 29

A.9 Board – Top Copper .................................................................................... 30

A.10 Board – Top Copper and Silk ..................................................................... 30

2020 Microchip Technology Inc. DS50002920A-page 3

MCP1633 Automotive Tail Light Reference Design

A.11 Board – Bottom Copper ............................................................................. 31

A.12 Board - Bottom Silk .................................................................................... 31

A.13 Board - Bottom Copper and Silk ................................................................ 32

Appendix B. Bill of Materials (BOM) ...........................................................................33

Appendix C. Typical Performance Data, Curves and WaveformsC.1 Introduction .................................................................................................. 37

C.2 Brake IOUT Dimming ................................................................................... 37

C.3 Brake IOUT Ripple ....................................................................................... 37

C.4 Fog - Minimum Level of Dimming ................................................................ 38

C.5 Fog IOUT Ripple .......................................................................................... 38

C.6 Position IOUT Ripple ................................................................................... 39

C.7 Turn IOUT Ripple ......................................................................................... 39

C.8 Turn VOUT and IOUT .................................................................................. 40

C.9 Turn All Steps Period of Time ...................................................................... 40

Worldwide Sales and Service .....................................................................................41



REFERENCE DESIGN

Preface

INTRODUCTIONThis chapter contains general information that will be useful to know before using the MCP1633 Automotive Tail Light Reference Design. Items discussed in this chapter include:

• Document Layout• Conventions Used in this Guide• Recommended Reading• The Microchip Website• Customer Support• Document Revision History

DOCUMENT LAYOUTThis document describes how to use the MCP1633 Automotive Tail Light Reference Design as a development tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MCP1633 Automotive Tail Light Reference Design.

• Chapter 2. “Installation and Operation” – Includes instructions on installing and operating the MCP1633 Automotive Tail Light Reference Design.

• Chapter 3. “Connectivity via Bluetooth” – Contains instructions on how to con-nect to the MCP1633 Automotive Tail Light Reference Design via Bluetooth and how to use the Android application.

• Appendix A. “Schematics and Layouts” – Shows the schematic and layout diagrams for the MCP1633 Automotive Tail Light Reference Design.

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the MCP1633 Automotive Tail Light Reference Design.

• Appendix C. “Typical Performance Data, Curves and Waveforms” - Contains typical performance curves and waveforms for the MCP1633 Automotive Tail Light Reference Design.

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our website (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB® IDE online help. Select the Help menu, and then Topics, to open a list of available online help files.



CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or dialog

“Save project before build”

Underlined, italic text with right angle bracket

A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilog format, where N is the total number of digits, R is the radix and n is a digit.

4‘b0010, 2‘hF1

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

Italic Courier New A variable argument file.o, where file can be any valid filename

Square brackets [ ] Optional arguments mcc18 [options] file [options]

Curly brackets and pipe character: { | }

Choice of mutually exclusive arguments; an OR selection

errorlevel {0|1}

Ellipses... Replaces repeated text var_name [, var_name...]

Represents code supplied by user

void main (void){ ...}


Preface

RECOMMENDED READING

This user’s guide describes how to use the MCP1633 Automotive Tail Light Reference Design. Another useful document is listed below. The following Microchip document is available and recommended as a supplemental reference resource:

• MCP1633 Data Sheet – “ “Low-Side PWM Controller with LED Dimming Capability” (DS20006289)

THE MICROCHIP WEBSITE

Microchip provides online support via our website at www.microchip.com. This website is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the website contains the following information:

• Product Support – Data sheets and errata, application notes and sample programs, design resources, user’s guides and hardware support documents, latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing

• Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.

Technical support is available through the website at: http://www.microchip.com/support.

DOCUMENT REVISION HISTORY

Revision A (April 2020)

• Initial release of this document.


http://www.microchip.com/support

http://www.microchip.com/support


NOTES:



REFERENCE DESIGN

Chapter 1. Product Overview

1.1 INTRODUCTIONThis chapter provides an overview of the MCP1633 Automotive Tail Light Reference Design and covers the following topics:

• MCP1633 Automotive Tail Light Reference Design Overview

• MCP1633 Automotive Tail Light Reference Design Features

• A summary of the primary devices used on the MCP1633 Automotive Tail Light Reference Design board

• MCP1633 Automotive Tail Light Reference Design technical specifications and functional description

• What the MCP1633 Automotive Tail Light Reference Design Kit contains.

1.2 MCP1633 AUTOMOTIVE TAIL LIGHT REFERENCE DESIGN OVERVIEWThe MCP1633 Automotive Tail Light Reference Design uses a step-up/step-down, switch-mode, DC/DC converter for LED driver applications. The board demonstrates several applications that simulate a tail light. It can be controlled either directly in stand-alone mode or from a phone, tablet or other mobile device by using an Android application. MCP1633 Automotive Tail Light Reference Design features Microchip's MCP1633 high-speed Pulse-Width Modulator (PWM). The MCP1633 comes in a small 16-pin QFN package and contains all the analog components necessary for a peak current mode control loop including specialized LED driver blocks. A 28-pin PIC16F15355 microcontroller is used to implement all the functions on the board.

FIGURE 1-1: MCP1633 Automotive Tail Light Reference Design - Top View.



1.3 MCP1633 AUTOMOTIVE TAIL LIGHT REFERENCE DESIGN FEATURES

• The MCP1633 Automotive Tail Light Reference Design has the following features:

• Can operate in Buck (step-down) or Boost (step-up) mode

• Factory-programmed source code provider

• Additional application functions can be implemented in the firmware

• Typical current of 200 mA; can be adjusted via hardware

• Sustain voltage stresses typically found in automotive products: 42V input for 180 ms

• High output power

1.4 DEVICE SUMMARY

The MCP1633 Automotive Tail Light Reference Design uses the following primary devices on the board:

• Four MCP1633 High-Speed PWM Controllers

When used in conjunction with the microcontroller, the MCP1633 devices will control the power system duty cycle to provide output current and/or voltage regulation.

• PIC16F15355 microcontroller (8-bit MCU)

Used to implement the dimming function, manage faults and protect the on-board load from overheating.

• MCP1790 Low-Dropout Regulator (LDO)

Used to supply regulated voltage (+5V) to the PIC16F15355 microcontroller, the four MCP1633 PWM Controllers and the four MCP9700 Temperature Sensors.

• Four MCP9700 Low-Power Voltage Output Temperature Sensor

Used to measure the temperature of the LED strings.

• MCP1703 Low-Dropout Regulator (LDO)

Used to supply regulated voltage (+3.3V) to the RN4871 Bluetooth Module.

• RN4871 Low-Energy Bluetooth Module


Product Overview

1.5 TECHNICAL SPECIFICATIONS

• Input voltage: +8V to +16V (surge voltage of 42V for max. 180 ms, 30 seconds repetition rate

• Configurable undervoltage lock-out circuit software (8V and 16V default thresholds)

• Overvoltage protection, hardware configurable for each block. The overvoltage threshold values are:

- 27V for the BRAKE/POS block

- 27V for the TURN block

- 16V for the FOG block

- 16V for the REVERSE block

• Typical output current set at 200 mA for all blocks (with hardware adjustments)

• Fully protected against Short-Circuit and No-Load conditions

Figure 1-2 shows a simplified block diagram of the application.

FIGURE 1-2: MCP1633 Automotive Tail Light Reference Design Simplified Block Diagram.

DC-DC converterTURN

DC-DC converterFOG

PIC Microcontroller

……

…

DC-DC converter REVERSE …

Bluetooth Module

DC-DC converterBRAKE/POS …



1.6 FUNCTIONAL DESCRIPTION

The MCP1633 Low-Side PWM Controller provides all the analog functions necessary to implement a stand-alone LED driver. When combined with an external microcontrol-ler, the MCP1633 can be used to implement various smart converters, such as those necessary for LED drivers.

The MCP1633 Automotive Tail Light Reference Design board uses four MCP1633, configured independently in each of the four blocks that describe the different functions served by an automotive tail light: "BRAKE/POS", "FOG", "REVERSE" and "TURN". The power trains use the Single-Ended Primary Inductor Converter (SEPIC) topology. The converters provide constant currents with limited voltage at the output, necessary for LED driver applications. The average current in the L1B inductor, which is also the output current of the converter, is sensed using a 0.1 shunt resistor (RS). As the volt-age across the shunt resistor is negative, the internal amplifier is set to -10x gain and the output is connected to the FB pin.

The conversion gain of this circuit is 1V/A.

The output current is set by RVREF.

Output current can be calculated with equation 1:

EQUATION 1-1:

The BRAKE/POS, FOG and REVERSE blocks use simple LED string and function in continuous mode.

The TURN block has a variable LED string and uses MOSFETs to control the turn-on and turn-off sequences from the PWM signal generated by the microcontroller. The TURN block also has an NMOS used for discharging from high voltage to low voltage when the light cycle starts and stops. This ensures that the LEDs are protected. The period for the dynamic light is 860 ms and the period for each step is 40 ms (see Figure 1-3). The resulting 1.16 Hz frequency is optimal for automotive specifications.

FIGURE 1-3: VOUT TURN Block Time Voltage.

IOUT

VREF

RS

R2

R1------

-------------------=

The resulting values for the application are:

VREF IOUT RS

R2

R1------ 200 mV= =

RVREF

VREF

50 A--------------- 4 k= =

40 m

s

40 m

s

40 m

s

40 m

sVOUT TURN

860 ms


Product Overview

1.7 WHAT THE MCP1633 AUTOMOTIVE TAIL LIGHT REFERENCE DESIGN KIT CONTAINS

The MCP1633 Automotive Tail Light Reference Design includes the following items:

• MCP1633 Automotive Tail Light Reference Design Board (ARD01038)

• Important Information Sheet

• Link to installing the Android application to connect from a phone or tablet.



NOTES:



REFERENCE DESIGN

Chapter 2. Installation and Operation

2.1 GETTING STARTED

The MCP1633 Automotive Tail Light Reference Design is fully assembled and tested. The board requires an external input voltage source (+8V to +16V).

2.1.1 Necessary Instruments and Tools

The following instruments and tools are necessary to install and operate the MCP1633 Automotive Tail Light Reference Design:

• Adjustable DC power supply with 0V-24V/3 ADC range output capability

• Digital oscilloscope with a minimum bandwidth of 50 MHz

• Signal generator

• Digital voltmeter/ammeter

• Wires for connections

2.1.2 Setup Procedure

Follow these steps prior to using the MCP1633 Automotive Tail Light Reference Design:

1. Connect a power supply to the input connector J, the “Positive” (+) and “Negative” (-) connector pins are marked on the board’s silk screen.

2. Connect the jumper on the Load Connectors to connect the LED's.

3. The DC voltage supplied by the Adjustable DC Power Supply must be between 6V and 16V.

4. Turn on the power supply.



2.1.3 Board Testing

The typical testing setup is depicted in Figure 2-1.

FIGURE 2-1: Typical Test Setup.


2.2 EVALUATING THE APPLICATION

The best way to evaluate the MCP1633 SEPIC LED Driver is to examine the circuit and measure voltages and currents with a digital voltage meter and probe the board with an oscilloscope.

Additional tools are necessary to evaluate some technical parameters of the board (temperature of power components, ability to withstand surge voltage pulse on input, EMI).

The firmware program in the PIC16F15355 can also be edited to modify the operation of the application.

2.3 FIRMWARE DESCRIPTION

The program starts with the initialization routine. Pins RC0, RC1 and RC2 are config-ured to output the PWM dimming for three of the four MCP1633 devices. Pin RC3 is set as the output pin for the fourth MCP1633. The LED intensity is adjusted by changing the duty cycle of the PWM. The frequency is 244 Hz (4.096 ms). The SYNC/EN clock signal is generated by pin RC5 with a frequency of 500 kHz.

The Capture/Compare/PWM (CCP) is configured for PWM mode operation and used for PWM dimming the LEDs. The PWM period can be calculated by writing to the PR2 register of the PIC16F15355. The PWM duty cycle is specified by writing to the CCPR1L register and to the CCP1CON[5:4] bits. Up to 10-bit resolution is available. The CCPR1L register contains the eight MSbs. The CCP1CON[5:4] bits contain the two LSbs. This 10-bit value is represented by CCPR1L:CCP1CON[5:4].

The analog inputs are used to measure the input voltage and the temperature of each of the LED strings. If the voltage is lower than 9V or higher than 16V the microcontroller will enter a voltage protection routine. If the temperature on one string is higher than +90°C the PWM for that string will be disabled and the DIMM pin will be set to zero and it will remain there until the temperature drops to +70°C.

The “No-Load condition” protection is provided by the FAULT pin of the MCP1633 and handled by the microcontroller. If the output voltage is too high and the overvoltage threshold is reached, the FAULT pin goes low and an interrupt occurs. The PWM is dis-abled and the DIMM pin is set “zero”. A timer starts and if no Fault conditions exists for a period of 1 s, the converter will resume normal operation.

For the turning light on the dimming pin no PWM is used. Four I/O pins control the LED segments using a timer to increment the number of segments lit. When the last segment is lit a MOSFET is used to discharge the output capacitor.



FIGURE 2-2: MCP1633 LED Driver Block Diagram.

Start

Initialization

Check UART

Check Voltage

Shut down light

OK voltage

Check Temperature

on every module

Shut down the hot module OK temperature

Set module on/off according to the UART

command



REFERENCE DESIGN

Chapter 3. Connectivity via Bluetooth

3.1 INTRODUCTION

This chapter contains information on how to take advantage of the Bluetooth connectivity capabilities of the MCP1633 Automotive Tail Light Reference Design and on the accompanying Android application.

3.2 INSTALLING THE ANDROID APPLICATION

The application can be found on the product page and is designed exclusively for the Android OS.

3.3 APPLICATION INTERFACE

3.3.1 Starting the Application

Figure 3-1 shows the Application’s interface at start-up. Notice the menu icon highlighted in red in the top-left corner of the interface.

FIGURE 3-1: Android Application – First Look.



3.3.2 Connecting to a Bluetooth Device

Access the menu for Bluetooth devices (see Figure 3-2). Tap the Refresh button at the bottom of the menu and then wait for the list of Bluetooth devices to populate. Tap on the list item that corresponds to the desired device and then wait for the Bluetooth device to sync with the board. The application will display a text message that says “Connection is successful” after the connection has been established, as shown in Figure 3-3.

FIGURE 3-2: Android Application – Connect to Board Bluetooth Module.

FIGURE 3-3: Android Application – Connection is Successful.


Connectivity via Bluetooth

3.3.3 Using the MCP1633 Automotive Tail Light Reference Design Android Application

Figure 3-4 shows the application’s control interface for the MCP1633 Automotive Tail Light Reference Design.

FIGURE 3-4: Android Application – Control Interface.

The control interface, depicted in Figure 3-4, features eight buttons that can be tapped to access the various functionalities provided by the MCP1633 Automotive Tail Light Reference Design:

1. Two buttons for the TURN function. Tap these buttons to activate the turning lights sequence on the board.

2. POSITION function – tap here to activate the position lights.

3. The FOG function button activates the board’s fog lights functionality.

4. REVERSE function: press this button to activate the REVERSE lights.

5. The BRAKE function can be activated via two buttons: one customized as a brake pedal in the bottom-left side of the interface and one ‘BRAKE’ button placed towards the middle-right side.

6. A START/STOP button. Must be pressed first to start the application.

7. The FOG block can be activated by the “PWM Fog Lights” slider. Move the slider to change the intensity of the fog lights.

11

2

3

4

5

6

7



NOTES:



REFERENCE DESIGN

Appendix A. Schematics and Layouts

A.1 INTRODUCTION

This Appendix contains the following schematics and layouts for the MCP1633 Automotive Tail Light Reference Design - ARD01038:

• Schematic – REVERSE Block

• Schematic – FOG Block

• Schematic – TURN Block

• Schematic – BRAKE/POS Block

• Schematic – MCU

• Schematic – Bluetooth Connectivity

• Board – Top Silk

• Board – Top Copper

• Board – Top Copper and Silk

• Board – Bottom Copper

• Board - Bottom Silk

• Board - Bottom Copper and Silk


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C6310 F50V1210

C64

0k603%

74

GND

0.1uF16V0603

C72

GNDGND

TP33

NVTFS5C478NLWFTAG4

1,2,3

5,6,7,8Q2

10R06031%

R85SDRV4

GND

LD1

LD2

LD3

LD4

A.2 SCHEMATIC – REVERSE BLOCK

VCC

10 F50V1210

C6010 F50V1210

C61

TP28ReverseGND GND10 H

13

L4A5V

5V

5V

10 F50V1210

C62

RBR2LAM60BTF

D31TP29

MCP1633MCP1633

Vcc

12

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COMP4

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IPO9

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Vext 11

SDRV 13

ISN- 8

ISN+ 7

IOUT6 OVP 15A

GN

D17

FAULT2

CS 10

EN16

U12

GND

4.7 F25V0805

C58

SI4850EY4

1,2,3

5,6,7,8Q12

100k06031%

R67

FAULT4

EN/SYNC

4.7R

R68TP31

5V

101

R10 H

24

L4B

DIMM4

1k06031%

R70

MCP9700A

GN

D3

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D1

VO

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2

U13

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100k06031%

R71

GND

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100k06031%

R7810000 pF50V0603

C65

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R7251k06031%

R731kR75

10000pF1kR76

TP32ISN4+

GNDGND GNDGND

33 pF50V0603

C670.680R12061%

R38

10000pF50V0603

C684.02k06031%

R79

GND GNDGND

5V

GND GND

in_temp4

OVP4ISN4-

220R06031%

R80

1kR81

1kR82

GND GND

47 pF50V0603

C69

100pFC73

GNDGND

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C7010000 pFC71

GND

20k06031%

R83

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1,2,3

5,6,7,8Q11

10R06031%

R66SDRV3

GND

3 SCHEMATIC – FOG BLOCK

VCC

TP19

10 F50V1210

C4310 F50V1210

C44

TP20

GNDFog

GND10 H

13

L3A5V

5V 5V

10 F50V1210

C46

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IOUT6 OVP 15

AG

ND

17

FAULT2

CS 10

EN16

U10

GND

4.7 F25V0805

C45

SI4850EY4

1,2,3

5,6,7,8Q10

100k06031%

R48

FAULT3

5V

EN/SYNC

4.7R

R49TP23

GN

D3

VD

D1

VO

UT

2

U11

105k06031%

R5010 H

24

L3B

DIMM3

1k06031%

R51OVP3

ISN3-

100k06031%

R52

GND

10 F50V1210

C47

0.1 F16V0603

C56

10k06031%

R55SDRV3

100k06031%

R5910000 pF50V0603

C49

ISN3+

C50

in_temp3

0.1R12061%

R5351k06031%

R541kR56

10000p kR57

TP25ISN3+

GNDGND GNDGND GND

33 pF50V0603

C510.680R12061%

R58

10000 pF50V0603

C524.02k06031%

R60

GNDGND GND GND GND

OVP3ISN3-

220R06031%

R61

1kR62

1kR63

GND

GNDGND

100pFC57

47 pF50V0603

C53

GNDGND

0.1 F16V0603

C5410000 pFC55

GND

20k06031%

R64

GND

20k06031%

R65

EN/SYNC

in_temp3

FAULT3DIMM3

5V

MC

P1633 A

uto

mo

tive Tail L

igh

t Referen

ce De

sign

DS

50

00

29

20

A-p

ag

e 2

6

2

02

0 M

icroch

ip T

ech

no

log

y Inc.

TP13

D16HDR-2.54 Male 1x2

J6

4.7uF50V1206

C31

TP16

D17

D18

SI2318DS-T1-GE3

Q4

10k08055%

R45

D19

Step1

Drain_MOS

D20SI2318DS-T1-GE3Q5

SI2318DS-T1-GE3

Q6_fade

D21Step2

Drain_MOS

D22

SI2318DS-T1-GE3

Q7

D23Step3

Drain_MOS

D24

SI2318DS-T1-GE3

Q8D25Step4

Drain_MOS

NVTFS5C478NLWFTAG

1,2,3

5,6,7,8 Q13

SDRV2

Step4

Step3

Step2

Step1

10R06031%

R77

A.4 SCHEMATIC – TURN BLOCK

10uF50V1210

C2710uF50V

1210

C28

TP124.7uF25V0805

C29

10uH

1

L2A

Turn 10uF50V

1210

C30

RBR2LAM60BTF

D15TP14

MCP163312

Fsw

SS/REF

COMP

FB

IPO

DIMM

11

13

8

7

IOUT 15

AG

ND

FAULT

10

EN

U8

SI4850EY1,2,3

5,6,7,8Q14

100k06031%

R28

FAULT2

EN/SYNC

4.7R

R29TP15

220k06031%

R3010uH

4

L2B

DIMM2

1k06031%

R31OVP2

ISN2-

100k06031%

R32

10k06031%

R35SDRV2

100k06031%

R3910000pF

50V0603

C33

ISN2+10000pFC34 0.1R

12061%

R3351k

06031%

R341k

R361k

R37

TP17ISN2+

33pF50V0603

C350.22R12061%

R41

10000pF50V0603

C364.02k06031%

R40

OVP2ISN2- Turn

1kR42

1kR43

2.7k06031%

R47

47pF50V

0603

C37

1uF50v0603

C2610000pF

C3920k06031%

R44

20k06031%

R46

MCP9700A

GN

D1

VO

UT

U9 0.1uF16V0603

C40

in_temp2

100pFC41

EN/SYNC

in_temp2

FAULT2DIMM2

Turn_fade

Sch

ematics an

d L

ayo

uts

2

02

0 M

icroch

ip T

ech

no

log

y Inc.

D

S5

00

02

92

0A

-pa

ge

27

A.

TP3

D4HDR-2.54 Male 1x2

12

J5

10 F50V1210

C910 F50V1210

C10

TP6

D5

GND GND

D7

D8

GN D9

D10

D11

D12

D13

D14

NVTFS5C478NLWFTAG4

1,2,3

5,6,7,8Q9

10R06031%

R27SDRV1

GND

5 SCHEMATIC – BRAKE/POS BLOCK

VCC

5V

10 F50V1210

C510 F50V1210

C6

TP2

GNDGND GND

4.7 F25V0805

C7

10 H

13

L1A

Br k /Pos

5V

5V

5V

10uF50V1210

C8

RBR2LAM60BTF

D3TP4

Vcc

12

Fsw1

SS/REF3

COMP4

FB5

IPO9

DIMM14

Vext 11

SDRV 13

ISN- 8

ISN+ 7

IOUT6 OVP 15

AG

ND

17

FAULT2

CS 10

EN16

U3

SI4850EY4

1,2,3

5,6,7,8Q1

100k06031%

R5

FAULT1

100k06031%

R6

EN/SYNC

4.7R

R7TP5

210k06031%

R810 H

24

L1B

DIMM1

1k06031%

R9

5V

OVP1ISN1-

100k06031%

R11

GND

10k06031%

R14

GN

D3

VD

D1

VO

UT

2

U6

SDRV1

100k06031%

R8610000 pF50V0603

C14

ISN1+

C15 0.1R12061%

R1251k06031%

R131kR15

10000pF kR16

TP7ISN1+

GNDGND GND GND

33 pF50V0603

C160.22R12061%

R17

10000pF50V0603

C174.02k06031%

R19

GND GNDGND

5V

D GND

OVP1ISN1-

220R06031%

R20

1kR21

1kR22

5V

in_temp1

47 pF50V0603

C18

GNDGND

0.1 F16V0603

C1910000 pFC20

GNDGND

GND

GND

0.1 F16V0603

C21

100pFC22

20k06031%

R23

GND

20k06031%

R24

in_temp1

FAULT1

DIMM1

EN/SYNC

MC

P1633 A

uto

mo

tive Tail L

igh

t Referen

ce De

sign

DS

50

00

29

20

A-p

ag

e 2

8

2

02

0 M

icroch

ip T

ech

no

log

y Inc.

GND

VCC5V

GND GND

1 F25V0805

C21 F50V0805

C3

MCLR

GND

PICKIT HEADER

ICSPCLKICSPDAT

HDR-2.54 Male 1x6

123456

J1

5V

/5VVOUT 3VIN1

GND2

VOUTVINGND

U1

2N7002,215

3

12

Q15

2N7002,215

3

12

Q16

10k06031%

R8710k06031%

R88

RX

TX

5V

A.6 SCHEMATIC – MCU

4.7k06031%

R2

24k06031%

R1

GND

VCC

DATEN/SYNC

DAT

RA027

RA128

RA21

RA32

RA43

RA54

RA67

RA76

RB018

RB119

RB220

RB321

RB422

RB523

RB6/ICSPCLK24

RB7/ICSPDAT25

RC0 8

RC1 9

RC2 10

RC3 11

RC4 12

RC5 13

RC6 14

RC7 15

RE3/MCLR/VPP 26

VDD17

VSS5

VSS16

EP29

U25V

GND

5V

GND

0.1 F50V0805

C1

MCLR

ICSPDATICSPCLK

RXTX

12k0603

R3

GreenD1

GND

4.7k0603

R26

1 F16V0603

C23

GND

147873-1SW1

GND

5V

1 F25V0805

C75

GND

10k06031%

R9010k06031%

R89

3V3

RX_Bluetooth

TX_Bluetooth

DIMM1

DIMM2DIMM3DIMM4

in_temp1

Step1Step2Step3Step4

in_temp2in_temp3in_temp4

FAULT1FAULT2FAULT3

FAULT4

Turn_fadeEN/SYNC

Schematics and Layouts

A.7 SCHEMATIC – BLUETOOTH CONNECTIVITY

A.8 BOARD – TOP SILK

GND GND GND

3V3.3V

GND1

VIN3 VOUT 2

U7

1 F16V0603

C241 F16V0603

C25

RN4871

P0_0 11RST10

P2_7 15

GND13GND2

P1_2 3

UART_TX 8

P1_6 6

P2_0 16

UART_RX 7

P1_7 5

P1_3 4

P3_6 9

BT_RF1

VBAT14

P0_2 12

U4

BLUE

D6

12k0603

R10

GND

GND

10 F10V0805

C11

4.7k0603

R4

GND

1 F16V0603

C74

RST_N

147873-1SW2

AD14

TP9TP8

CONNECTOR

GND GNDJ3 RESET

BLUETOOTH MODULE AND CONFIGURATION CIRCUITS

3V3 LDO FROM DN2470

PWM0

0.1 F16V0603

C12

GND

4.7k0603

R25

TX

RX_BluetoothTX_Bluetooth

P2_0

RX

RST_N

U5/1.9V

VDD3 VOUT 1

VSS2

0.1 F16V0603

C13

GND GND

RST_N

Bluetooth Module Reset Circuit

3V33V3

3V3

3V3

3V3

5V

5V

HDR-2.54 Male 1x6

123456

J3



A.9 BOARD – TOP COPPER

A.10 BOARD – TOP COPPER AND SILK


Schematics and Layouts

A.11 BOARD – BOTTOM COPPER

A.12 BOARD - BOTTOM SILK



A.13 BOARD - BOTTOM COPPER AND SILK



REFERENCE DESIGN

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty. Reference Description Manufacturer Manufacturer Part Number

1 C1 Capacitor, ceramic, 0.1 µF, 50V, 10%, X7R, surface mount, 0805

KEMET C0805C104K5RACTU

2 C2, C75 Capacitor, ceramic, 1 µF, 25V, 10%, X7R, surface mount, 0805

AVX Corporation 08053C105K4Z2A

1 C3 Capacitor, ceramic, 1 µF, 50V, 20%, Y5V, surface mount, 0805

SamsungElectro-Mechanics America, Inc.

CL21F105ZBFNNNE

18 C5, C6, C8, C9, C10, C27, C28, C30, C43, C44, C46, C47, C48, C60, C61, C62, C63, C64

Capacitor, ceramic, 10 µF, 50V, 20%, X7S, surface mount, 1210

TDK Corporation C3225X7S1H106M250AB

4 C7, C29, C45, C58 Capacitor, ceramic, 4.7 µF, 25V, 10%, X7R, surface mount, 0805

TDK Corporation C2012X7R1E475K125AB

1 C11 Capacitor, ceramic, 10 µF, 10V, 10%, X5R, surface mount, 0805

Taiyo Yuden Co., Ltd. LMK212BJ106KG-T

9 C12, C13, C19, C21, C40, C54, C56, C70, C72

Capacitor, ceramic, 0.1 µF, 16V, 10%, X7R, surface mount, 0603

Taiyo Yuden Co., Ltd. EMK107B7104KA-T

16 C14, C15, C17, C20, C33, C34, C36, C39, C49, C50, C52, C55, C65, C66, C68, C71

Capacitor, ceramic, 10000 pF, 50V, 20%, X7R, surface mount, 0603

AVX Corporation 06035C103KAT2A

4 C16, C35, C51, C67 Capacitor, ceramic, 33 pF, 50V, 5%, C0G, surface mount, 0603

Murata Electronics North America, Inc.

GRM1885C1H330JA01D

4 C18, C37, C53, C69 Capacitor, ceramic, 47 pF, 50V, 5%, NP0, surface mount, 0603

KEMET C0603C470J5GACTU

4 C22, C41, C57, C73 Capacitor, ceramic, 100 pF, 50V, 5%, NP0, surface mount, 0603

Cal-Chip Electronics Inc. GMC10CG101J50NTLF

4 C23, C24, C25, C74 Capacitor, ceramic, 1 µF, 16V, 20%, Y5V, surface mount, 0603

TDK Corporation C1608Y5V1C105Z

1 C26 Capacitor, Ceramic, 1 µF, 50V, 10%, X7R, surface mount, 0603

Taiyo Yuden Co., Ltd. UMK107AB7105KA-T

Note: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.



1 C31 Capacitor, ceramic, 4.7 µF, 50V, 10%, X7R, surface mount, 1206

TDK Corporation C3216X7R1H475K160AC

1 D1 Diode, LED, green, 2.05V, 10 mA, clear, surface mount, 0603

Panasonic® - ECG LNJ326W83RA

4 D3, D15, D26, D31 Diode, Schottky, 60V, 2A, surface mount, SOD-128, AEC-Q101

ROHM Semiconductor RBR2LAM60BTFTR

14 D4, D5, D7, D8, D9, D10, D11, D12, D13, D14, D27, D28, D29, D30

Diode, LED, red, 2.32V, 350 mA, 621 nm, clear, surface mount, 1108

OSRAM OptoSemiconductors GmbH.

KRDM-LQ31.23-HYKY-26-J3T3-Z

1 D6 Diode, LED, blue, 2.8V 20 mA, 15 mcd, clear, surface mount, 0603

Lite-On®, Inc. LTST-C193TBKT-5A

10 D16, D17, D18, D19, D20, D21, D22, D23, D24, D25

Diode, LED, yellow, 2.37V, 350 mA, 590 nm, clear, surface mount, 1108


KYDM-LQ31.23-HYKX-46-J3T3-Z

1 J1 Connector, HDR-2.54, male, 1x6, gold, 5.84MH, through hole, right angle

Amphenol Commercial 68016-106HLF

1 J2 Connector, power, 2 mm × 5.5 mm, switch, through hole, right angle

CUI Inc. PJ-002A

1 J3 Connector, HDR-2.54, male, 1x6, tin, 5.84 MH, through hole, vertical

Sullins ConnectorSolutions

PEC06SAAN

4 J5, J6, J7, J8 Connector, HDR-2.54, male, 1x2, gold, 5.84 MH, through hole, vertical

Amphenol Commercial 77311-118-02LF

4 L1, L2, L3, L4 Inductor, 10 µH, 2.45A, 20%, surface mount, L12.3W12.3H6

Coilcraft MSD1260-103MLB

4 LD1, LD2, LD3, LD4 Diode, LED, white, 2.95V, 350 mA, 70 lm, clear, surface mount, 1108


KW DMLQ33.SG-Z8KF7-EBVFFCBB46-8E8G

1 PCB1 Printed Circuit Board - MCP1633 Automotive Tail Light Reference Design

Microchip Technology Inc.

04-01038

4 Q1, Q10, Q12, Q14 Transistor, FET, N-Channel, 60V, 6A, 1.7W, SOIC-8

Vishay Siliconix SI4850EY-T1-E3

4 Q2, Q9, Q11, Q13 Transistor, FET, N-Channel, 40V, 26A, 20W, WDFN-8

ON Semiconductor® NVTFS5C478NLWFTAG

5 Q4, Q5, Q6, Q7, Q8 Transistor, FET, N-Channel, 40V, 3A, 750 mW, SOT-23-3

Vishay Siliconix SI2318DS-T1-GE3

2 Q15, Q16 Transistor, FET, N-Channel, 60V, 300 mA, 830 mW, SOT-23-3

NXP Semiconductors 2N7002,215

TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED)




Bill of Materials (BOM)

1 R1 Resistor, thick film, 24 k 1%, 1/10W, surface mount, 0603

Panasonic - ECG ERJ-3EKF2402V

1 R2 Resistor, thick fIlm, 4.7 k, 1%, 1/16W, surface mount, 0603

Multicomp Inc. MC0063W060314K7

2 R3, R10 Resistor, thick film, 12 k, 1%, 1/10W, surface mount, 0603

Yageo Corporation RC0603FR-0712KL

3 R4, R25, R26 Resistor, thick film, 4.7 k, 5%, 1/10W, surface mount, 0603

Panasonic - ECG ERJ-3GEYJ472V

13 R5, R6, R11, R28, R32, R39, R48, R52, R59, R67, R71, R78, R86

Resistor, thin film, 100 k, 1%, 1/8W, surface mount, 0603

Vishay Beyschlag MCT06030C1003FP500

4 R7, R29, R49, R68 Resistor, thick film, 4.7R, 1%, 1/10W, surface mount, 0603

Panasonic - ECG ERJ-3RQF4R7V

1 R8 Resistor, thick film, 210 k, 1%, 1/10W, surface mount, 0603


20 R9, R15, R16, R21, R22, R31, R36, R37, R42, R43, R51, R56, R57, R62, R63, R70, R75, R76, R81, R82

Resistor, thick film, 1 k, 1%, 1/10W, surface mount, 0603

Panasonic - ECG ERJ3EKF1001V

4 R12, R33, R53, R72 Resistor, thick film, 0.1R, 1%, 1W, surface mount, 1206

Panasonic - ECG ERJ-8BWFR100V

4 R13, R34, R54, R73 Resistor, thick film, 51 k, 1%, 1/10W, surface mount, 0603


8 R14, R35, R55, R74, R87, R88, R89, R90


TE Connectivity, Ltd. CPF0603F10KC1

2 R17, R41 Resistor, thick film, 0.22R, 1%, 1/2W, surface mount, 1206

Vishay/Dale RCWE1206R220FKEA

4 R19, R40, R60, R79 Resistor, thick film, 4.02 k, 1%, 1/10W, surface mount, 0603

Stackpole Electronics, Inc.

RMCF0603FT4K02

3 R20, R61, R80 Resistor, thick film, 220R, 1%, 1/10W, surface mount, 0603

Yageo Corporation RC0603FR-07220RL

8 R23, R24, R44, R46, R64, R65, R83, R84


Panasonic - ECG ERJ3EKF2002V

4 R27, R66, R77, R85 Resistor, thick film, 10R, 1%, 1/10W, surface mount, 0603

Panasonic - ECG ERJ3EKF10R0V



2 R38, R58 Resistor, thick film, 0.680R, 1%, 1/4W, surface mount, 1206

TE Connectivity, Ltd. 1-1622824-3







Panasonic - ECG ERJ-P06J103V

1 R47 Resistor, thick film, 2.7 k, 1%, 1/10W, surface mount, 0603






2 SW1, SW2 Switch, tactile, SPST, 24V, 50 mA, surface mount

TE Connectivity Alcoswitch

147873-1

13 TP2, TP3, TP6, TP12, TP13, TP16, TP19, TP20, TP21, TP24, TP28, TP30, TP33

Misc., test point multi-purpose mini black

Keystone® Electronics Corp.

5001

1 U1 Microchip Analog LDO, 5V MCP1790, SOT-223-3


MCP1790T-5002E/DB

1 U2 Microchip MCU 8-BIT, 32 MHz, 14K, 1K, PIC16F15355, 6 mm × 6 mm UQFN-28


PIC16F15355-E/MX

4 U3, U8, U10, U12 Microchip Analog PWM Controller, 2.2 MHz, MCP1633, QFN-16


MCP1633-E/MG

1 U4 Microchip RF Bluetooth, RN4871, Module-16


RN4871-V/RM118

1 U5 Microchip Analog voltage detector, 1.9V, MCP112, SOT-23-3


MCP112T-195I/TT

4 U6, U9, U11, U13 Microchip Analog temperature sensor, -40°C to +150°C, MCP9700, SOT-23-3


MCP9700AT-E/TT

1 U7 Microchip Analog LDO, 3.3V, MCP1703, SOT-23A-3


MCP1703AT-3302E/CB

TABLE B-2: BILL OF MATERIALS (BOM) - MECHANICAL PARTS

Qty.1 Reference Description Manufacturer Manufacturer Part Number

4 PAD1, PAD2, PAD3, PAD4

Mechanical H.W. rubber pad, cylindrical, D7.9, H5.3, black

3M 70006431483







REFERENCE DESIGN

Appendix C. Typical Performance Data, Curvesand Waveforms

C.1 INTRODUCTION

This chapter shows some of the typical performance parameters and curves of the MCP1633 Automotive Tail Light Reference Design.

C.2 BRAKE IOUT DIMMING

C.3 BRAKE IOUT RIPPLE

IOUT50 mA/div1 m20 MHz

4 ms/div

IOUT20 mA/div1 M20 MHz

2 µs/div



C.4 FOG - MINIMUM LEVEL OF DIMMING

C.5 FOG IOUT RIPPLE



2 µs/div


C.6 POSITION IOUT RIPPLE

C.7 TURN IOUT RIPPLE


2 µs/div


2 µs/div



C.8 TURN VOUT AND IOUT

C.9 TURN ALL STEPS PERIOD OF TIME


200 ms/div

VOUT10V/div20 MHz


100 ms/div

VOUT10V/div20 MHz

t: 162.473 ms, 1/t: 6.15 Hzi: 203.248 mA, i/t: 1.25A/s

t: -67.757 µsi: -2.020 mA t: 162.405 ms

i: 201.228 mA



AMERICASCorporate Office2355 West Chandler Blvd.Chandler, AZ 85224-6199Tel: 480-792-7200 Fax: 480-792-7277Technical Support: http://www.microchip.com/supportWeb Address: www.microchip.com

AtlantaDuluth, GA Tel: 678-957-9614 Fax: 678-957-1455

Austin, TXTel: 512-257-3370

BostonWestborough, MA Tel: 774-760-0087 Fax: 774-760-0088

ChicagoItasca, IL Tel: 630-285-0071 Fax: 630-285-0075

DallasAddison, TX Tel: 972-818-7423 Fax: 972-818-2924

DetroitNovi, MI Tel: 248-848-4000

Houston, TX Tel: 281-894-5983

IndianapolisNoblesville, IN Tel: 317-773-8323Fax: 317-773-5453Tel: 317-536-2380

Los AngelesMission Viejo, CA Tel: 949-462-9523Fax: 949-462-9608Tel: 951-273-7800

Raleigh, NC Tel: 919-844-7510

New York, NY Tel: 631-435-6000

San Jose, CA Tel: 408-735-9110Tel: 408-436-4270

Canada - TorontoTel: 905-695-1980 Fax: 905-695-2078

ASIA/PACIFICAustralia - SydneyTel: 61-2-9868-6733

China - BeijingTel: 86-10-8569-7000

China - ChengduTel: 86-28-8665-5511

China - ChongqingTel: 86-23-8980-9588

China - DongguanTel: 86-769-8702-9880

China - GuangzhouTel: 86-20-8755-8029

China - HangzhouTel: 86-571-8792-8115

China - Hong Kong SARTel: 852-2943-5100

China - NanjingTel: 86-25-8473-2460

China - QingdaoTel: 86-532-8502-7355

China - ShanghaiTel: 86-21-3326-8000

China - ShenyangTel: 86-24-2334-2829

China - ShenzhenTel: 86-755-8864-2200

China - SuzhouTel: 86-186-6233-1526

China - WuhanTel: 86-27-5980-5300

China - XianTel: 86-29-8833-7252

China - XiamenTel: 86-592-2388138

China - ZhuhaiTel: 86-756-3210040

ASIA/PACIFICIndia - BangaloreTel: 91-80-3090-4444

India - New DelhiTel: 91-11-4160-8631

India - PuneTel: 91-20-4121-0141

Japan - OsakaTel: 81-6-6152-7160

Japan - TokyoTel: 81-3-6880- 3770

Korea - DaeguTel: 82-53-744-4301

Korea - SeoulTel: 82-2-554-7200

Malaysia - Kuala LumpurTel: 60-3-7651-7906

Malaysia - PenangTel: 60-4-227-8870

Philippines - ManilaTel: 63-2-634-9065

SingaporeTel: 65-6334-8870

Taiwan - Hsin ChuTel: 886-3-577-8366

Taiwan - KaohsiungTel: 886-7-213-7830

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Worldwide Sales and Service

02/28/20

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