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Power Switches

New Product Update

January 2020


Power Switches new product update | Agenda

• Overview of Power Switches

• Solving Your Protection Needs With an eFuse

– Functions

• Overvoltage Protection

• Reverse current blocking

• Mis-wiring Protection

• Inrush current control

– Discrete vs. Integrated

– UL recognition

• TI.com resources – New product releases, www.ti.com/powerswitches

– 11 Ways to Protect Your Power Path e-Book

– Custom Quick Search Tool

http://www.ti.com/powerswitches


VIN VOUT

ON

Overview | What is a Power Switch?

5

A device that turns DC power OFF and ON to a load

Power

Supply Load

Power Switch +24V +24V

The two main functions that a Power Switch can provide to a system is power protection

and power distribution


Overview | Power Switch Use Cases

Common Design Challenges

Input Power Protection


• Current limiting

• Overvoltage protection


• Surge immunity

• Reverse Polarity Protection

Power Distribution

• Power Sequencing


• Power Muxing/Power Oring

Output Power Protection

• Current limiting

• Inductive load driving





– Functions






– UL recognition






eFuse | Basics

Typical eFuse topologies

Device Description

TPS2595 2.7-18V, 34mΩ, 0.5-4A eFuse with current monitoring

TPS2596 2.7-19V, 89mΩ, 0.15-2A eFuse with current monitoring

TPS25982 2.7-24V, 3mΩ, 1-15A eFuse with current monitoring

TPS2660 4.2-60V, 150mΩ, 0.1- 2.23A eFuse with back-to-back FETs for mis-wiring protection

TPS2662 4.5-60V, 500mΩ, 0.025-0.880A with back-to-back FETs for mis-wiring protection

TPS1663 4.5-60V, 31mΩ, 0.6-6A eFuse with current monitoring and power limiting

TPS2663 4.5-60V, 31mΩ, 0.6-6A eFuse with power limiting and external Blocking FET for

mis-wiring protection

Hero eFuses

Key Protection Functions of an eFuse

eFuse topologies

- Single FET

- NMOS FET based

- Does not block reverse current

- Back-to-back FET (B2B)

- NMOS FET based

- B2B FETs enables reverse

current blocking and power

muxing

- B2B FETs enables reverse

polarity protection

- Fast trip short-circuit protection

- Adjustable current limit

- Current Monitoring

- Inrush current control

- Reverse Current Blocking (RCB)

- Reverse Polarity Protection

- Adjustable Power Limiting

- Overvoltage Protection

- Surge & EFT Immunity

http://www.ti.com/product/TPS2595http://www.ti.com/product/TPS2596http://www.ti.com/product/TPS25982http://www.ti.com/product/TPS2660http://www.ti.com/product/TPS2662http://www.ti.com/product/TPS1663http://www.ti.com/product/TPS2663


eFuse | Applications & Functions

Overvoltage Protection Surge & EFT Immunity Reverse Current Blocking

Mis-wiring protection Inrush Current Control Short-circuit protection

eFuses can help to protect the interior of the

system from external overvoltage events that

can occur during hot-swap or other events.

eFuses are designed to provide up to criteria-

A surge and EFT immunity to prevent system

downtime

Some TI eFuses have back-to-back integrated

FETs to prevent holdup capacitors and super-

capacitors from discharging.

eFuses have integrated circuitry to prevent

damage from mis-wiring without sacrificing

power dissipation

eFuses provide inrush current control for

charging large output capacitances during

hot-swap events.

When there is a sudden short to ground, an

eFuse can be used to quickly turn power OFF

to protect the system.

+

-

+

-

+

-

+

-

Surge: 500V peak, 1.2/50us


eFuse | Overvoltage Protection

eFuse overvoltage responses

End equipment Application

Factory Automation &

Motor Drives

- Backplane power protection for hot-swap events and surge events

- Field power protection for surge events and where long cables are present

which can create large inductive spikes

Building Automation - Field power protection for surge events and where long cables are present

which can create large inductive spikes

Application Examples

Overvoltage cutoff Overvoltage clamping Two Options

- Overvoltage cutoff – Immediately turns off the

MOSFET to block the overvoltage event

- Overvoltage clamping – Clamps the output voltage

to a certain threshold

- Both options can be adjustable via external resistor

ladders










downtime






power dissipation



hot-swap events.




+

-

+

-

+

-

+

-



eFuse | Reverse Current Blocking

Reverse Current Blocking Example



Motor Drives

- IEC61000-4-29 Power Interruption Testing

- Blocking reverse current to ensure Motor Drive powers down in a safe state

Building Automation - Backup battery switchover for Fire Alarm Control Panels and Building Security Systems

- Blocking reverse current to ensure HVAC system powers down in a safe state

Grid Infrastructure - Last gasp transmission in eMeters and data concentrators


TPS2663 response to IEC61000-4-29 Power Interruption Test

There is an internal comparator in the device to

detect the reverse current and shutoff the

blocking FET to block reverse current

TPS2663 Simplified Diagram










downtime






power dissipation



hot-swap events.




+

-

+

-

+

-

+

-



Mis-wiring Example

eFuse | Mis-wiring protection


Factory Automation & Motor Drives

- Analog Input & Outputs

- Digital Outputs

- Field Power Supply Input

Building Automation

- Analog Input & Outputs

- Digital Outputs

- Supply Inputs

Automotive & Industrial Transport - Reverse battery


Power

Supply

+

-

System

eFuses offer integrated circuitry to handle reverse polarity at the input and for

some devices like TPS2662, they offer reverse polarity at the output










downtime






power dissipation



hot-swap events.




+

-

+

-

+

-

+

-



Inrush Current Control Example

eFuse | Inrush current control



Motor Drives

- Backplane power protection where hot-swap events can occur

- Systems with large holdup capacitances for power failures

Building Automation - Backplane power protection where hot-swap events can occur

- Systems with large holdup capacitances for power failures

Grid infrastructure - Charging up supercapacitors for last gasp transmission


eFuses offer a dv/dt pin which can be used to adjust the output

slew rate of the switch to control the amount of inrush current

needed to charge up the output capacitance










downtime



capacitors from discharging when power is lost.



power dissipation



hot-swap events.




+

-

+

-

+

-

+

-





Mis-wiring protection Inrush Current Control 4-20mA current loop

protection






downtime






power dissipation



hot-swap events.

A new eFuse, TPS2661, is coming soon to

protect your Analog I/Os from damage from

mis-wiring, surge, & overcurrent events.

+

-

+

-

+

-

+

-


Reach out to your local Field Applications Engineer for more

information on 4-20mA current protection





– Functions






– UL recognition






Reverse polarity protection

Current limiting

Inrush current control

Size Comparison | Discrete vs. Integrated How eFuses add features & decrease solution size


Current limiting




Current limiting



~166mm2 Power MOSFET

(TO-263-2L)

Diode

(SOD123)

BJT

(SOT23)

Diode

(SMB)



Current limiting


+ No damage from faults

+ Thermal shutdown

+ Rev. current protection

+ Overvoltage clamping


~166mm2

20mm2

Power MOSFET

(TO-263-2L)

Diode

(SOD123)

BJT

(SOT23)

Diode

(SMB)

eFuse Solution





– Functions






– UL recognition






• Tight current limit during overloads & startup – Prevents fires, overheating, bus droop, supply stress

• Significantly lower peak currents during short circuit – Often by 5x 20x

• Significantly faster short circuit shut off – Microseconds not 10s of milliseconds

• Most TI eFuses recognized by UL as Protection Devices – UL2367 “Solid State Overcurrent Protectors”

eFuse | Certification


= Input Reverse Polarity

= Output Reverse Polarity

= External Blocking FET

= Integrated B2B FET

= Active Low

= Current monitoring

TPS2420 VIN 3 - 20V, 33mΩ, 5A, ABS MAX 35V

Available Now

eFuse | Selection Tree

eFuse

< 30V eFuse

Key

TPS2594x VIN 4.5-18V, 42mΩ, 5A, ABS MAX 20V

Available Now

IRP

ORP

60V eFuse

TPS2662x VIN 4.2 – 57V, 500mΩ, 0.88A,

ABS MAX 60V

Available Now

TPS2660x VIN 4.2 – 55V, 150mΩ, 2A, ABS

MAX 60V

Available Now

Hig

he

r I O

UT

Ext

B2B

Hig

her

I OU

T, L

ow

er

RD

SO

N

B2B

TPS2596x VIN 2.7 -19V, 85mΩ, 2A, ABS MAX 21V

Available Now


Available Now

TPS25923/4 VIN 4.5-18V, 28mΩ, 5A, ABS MAX 20V

Available Now


Available Now

TPS25925/6 VIN 4.5-18V, 28mΩ, 5A, ABS MAX 30V

Available Now

Ext

Production New Sampling

B2B

IRP

ORP

B2B

IRP

< 20V eFuse

TPS2421-x VIN 3 - 20V, 33mΩ, 5A, ABS MAX 25V

Available Now

TPS25200 VIN 2.5- 6.5V, 60mΩ, 2.9A, ABS MAX 20V

Available Now

L

IMON L

IMON

IMON

L

TPS2590 VIN 3 - 20V, 30mΩ, 5.5A, ABS MAX 25V

Available Now

L

TPS25910 VIN 3 - 20V, 30mΩ, 6.5A, ABS MAX 22V

Available Now

L

IMON

IMON

IMON

IMON

TPS25982 2.7V -24V, 2.7mΩ, 15A, 3% IMON

Accuracy, Configurable retries and timer

Available Now

IMON

TPS2663x VIN 4.2 – 60V, 29mΩ, 6A

Available Now

TP1663x VIN 4.2 – 60V, 29mΩ, 6A

Available Now

IMON

IMON

Ext

IMON

B2B

40V eFuse

http://www.ti.com/product/TPS2420http://www.ti.com/product/TPS25942Ahttp://www.ti.com/product/TPS2662http://www.ti.com/product/TPS2660http://www.ti.com/product/TPS25921Ahttp://www.ti.com/product/TPS2595http://www.ti.com/product/TPS25924http://www.ti.com/product/TPS24750ti.com/product/TPS25925http://www.ti.com/product/TPS2421-1http://www.ti.com/product/TPS25200http://www.ti.com/product/TPS2590http://www.ti.com/product/TPS25910http://www.ti.com/product/TPS25982http://www.ti.com/product/TPS2660http://www.ti.com/product/TPS2660


• 4.5V - 60V DC operation

• Integrated 31mΩ MOSFET

• Input Reverse polarity protection and reverse current blocking support with

external N-channel FET

• Load protection with criteria-A system performance during Surge

(IEC61000-4-5), EFT (IEC61000-4-4), Voltage interruptions (IEC61000-4-

29)

• 0.6 to 6 A Accurate current limit (±8%)

• Programmable UVLO; OVP Cut-Off (TPS26630/31), OV clamp (35Vmax)

(TPS26632/33)

• Programmable Output Slew Rate using dVdT pin

• Output power limiting scheme (PLIM) – TPS26632/TPS26633

• PGOOD output with Programmable detection threshold (PGTH)

• Pulse current /power support with circuit breaker mode – TPS26331/33

• Analog current monitor output (IMON)

• QFN-24, 4mmx4mm Package with 0.5mm pin pitch

• HTSSOP-24, 6.5mmx4.4mm Package with 0.65mm pin pitch

• Tolerates VBUS transients

• Lower Power Dissipation

• Protects against mis-wiring in the field

• Support Reverse Current Protection

• Robust industrial protection

• Tight current limit accuracy reduces upstream power supply cost

• Flexible Design Options

• Inrush slew can be tuned to load

• Design flexibility with foldback current limit to pass IEC61010-1 (Limited Energy

ckt)

• Flexible Design Options

• QFN package for dense boards

• Standard leaded package

Applications • PLC (I/O Modules, CPU, HMI)

• AC and Servo Drives

• Electronic circuit Breakers

• Industrial Printer controls

• Sensors Hubs

Features Benefits

TPS2663x: 60V, 6A, Power Limiting, Surge Protection eFuse with class-A performance

UVLO

COUT

R1

R2

31mΩ

IN OUT

DRV

dVdT

TPS26630/31

ILIM

IN_SYS

RILIM

FLT

GND

SHDN

R3

UVLO

OVP CdVdT

MODE

IMON

RIMON

R4

R5PGTH

PGOOD

Protected supplyTo Load

4.5V-60V

B_GATE

Optional components for RCB and RPP

UVLO

COUT

R1

R2

31mΩ

IN OUT

DRV

dVdT

TPS26632

ILIM

IN_SYS

RILIM

FLT

GND

SHDN

R3

UVLO

PLIM CdVdT

MODE

IMON

RIMON

R4

R5PGTH

PGOOD

VIN_sys(24V fromExternal field supply)

B_GATE2N7002

SMCJ36CA

DC-DC

VIN

Rpu

EN

I_OUT I_LOAD

CSD19537Q3

Production


Power Switches | Featured Products

• Input Power Protection

– eFuse

• TPS2595

– 3.3V/5V/12V rail protection

• TPS2663 / 1663

– 24VDC Industrial

– 24VAC DC rectified

voltage

– Ideal Diode

• LM66100

– 3.3V/5V reverse current

blocking

– 1.8V/3.3V/5V Power Oring

• Power Distribution

– Load Switch

• TPS22919

– Cost and space optimized

solution

• TPS22916/7

– Low leakage for battery

powered applications

– Power Mux

• TPS2121

– Power muxing between

main supply and backup

supply

• Output Power Protection

– High-Side Switch

• TPS27S100

– Single channel

– Inductive load driving

(relays, actuactors, etc…)

– Board-to-board current

limiting

• TPS4H160

– Quad channel

– Inductive load driving

(relays, actuactors, etc…)

– Board-to-board current

limiting

Functions • Current limiting

• Overvoltage protection



• Surge & EFT immunity

• Mis-wiring protection

Functions • Power sequencing



• Power Muxing

• Power ORing

Functions • Current limiting

• Inductive de-magnetization

• Surge immunity (IEC61000-4-5)

• EFT immunity (IEC61000-4-4)

• Mis-wiring protection


LM66100 ±6V, Low-IQ Ideal Diode with Reverse Polarity Protection

29

• Industrial: eMeters, Water/Gas Meters, Building

Automation, GPS, Tracking

Applications

• LM66100: Samples 1Q19

• Online Support & E2E Community

Device Features System Benefits

• Input Operating Voltage (+): 1.5 – 5.5V • Wide Input Voltage Range Suitable for Many Applications

• Reverse Standoff Voltage (-): -6V • Protects System from Reverse Battery Hookup

• Output Current (IMAX): 1.5A • SOT Package Option Supports up to 1.5A (X2SON ≤ 1A)

• Low Forward Voltage Drop: 100mΩ • Reduces Power Loss and Extends Battery Lifetime

• Comparator Chip Enable (CE): • Integrated comparator supports Simple ORing Circuits

• Status Output Indication (ST): • Provides ORing Flexibility and System Monitoring

• Reverse Leakage: 10nA • Low Reverse Leakage to Prevent Battery Backcharging

• IIN Current: 0nA • No Current Drawn from Input to maximize standby time

• IOUT Current (ON): 500nA • Minimal Current Drawn from Output when Enabled

Product Folder, Tools, & Resources

SC-70 (5)

2.0x1.3mm

0.65mm pitch

+-

VIN

RL

CEVIN

CL

VOUT

RST

ST

ON

OFF ON

OFF

Logic

VIN

Production

http://www.ti.com/lsds/ti/power-management/integrated-load-switches-overview.pagehttp://www.ti.com/lsds/ti/power-management/integrated-load-switches-overview.pagehttp://www.ti.com/lsds/ti/power-management/integrated-load-switches-overview.pagehttps://e2e.ti.com/support/power_management/switches/f/949


TPS22919 Small Plastic Load Switches with Adjustable Timing

30

• HD TV

• STB

• Wearables

Applications

Device Features System Benefits

• Input Voltage (VIN): 1.6 – 5.5V • Wide Input Voltage Range Suitable for Many Applications

• ON-Resistance (RON): 90mΩ • Multiple RON Options for Optimal Power Dissipation

• Max Current (IMAX): 1.5A • Support up to 1.5A Continuous Load Current

• Short Circuit Protection (ISC): 3A • Automatic Protection and Recovery from Short Circuits

• Thermal Shutdown (TSD): >125°C • Thermal Shutdown to Protect Against Overheating

• IQ Current (ON): 5uA • Low Current Consumption Maximizes Lifetime

• ISD Current (OFF): 0.5uA in Battery Powered Applications

• Controlled Turn ON: 1ms • 1ms Turn On Time Limits Capacitor Inrush Current

• Output Discharge: ≥ 20Ω • Quickly Discharges Output to Ground when Disabled

Product Folder, Tools, & Resources

SOT (6)

2.0x2.1mm

0.65mm pitch

• TPS22919: Released

• Online Support & E2E Community

Production

http://www.ti.com/lsds/ti/power-management/integrated-load-switches-overview.pagehttp://www.ti.com/lsds/ti/power-management/integrated-load-switches-overview.pagehttp://www.ti.com/lsds/ti/power-management/integrated-load-switches-overview.pagehttps://e2e.ti.com/support/power_management/switches/f/949


Operating Voltage: 3.5 ~ 40V,

RDSON: 80mΩ typical, 166mΩ max

Operating Junction Temperature: -40 to 150C

Very low standby current: < 2uA

uC Input 3.3V and 5V logic compatible

Accurate current sense: ±30mA @ 1A, ±2.5mA @ 25mA

Adjustable, accurate current limit: 0.5A – 4A, ±20% when > 500mA

A Version: Open drain status output

B Version: Current sense analog output

Protection

Short to GND protection by current limit (internal or external)

Thermal Shutdown and Thermal Swing

Integrated VDS clamp for inductive load driving (50 – 70V)

Diagnostic

Overcurrent and short to ground detection

Open load / Short to supply detection during on and off state

DIAG_EN allow multiplexing for Current Sense / Status Output

Package: HTSSOP-14 (5mm x 6.4mm), 32mm2

QFN-16 (3.5mm x 4mm), 14mm2

TPS27S100 Single Channel Smart High Side Switch

Applications

PLC – Digital Output Module

Building Automation

Telecom/Networks

Features Benefits

Open load detection provides an interrupt to the system when there is a

fault (wire break, short-circuit, etc…) reduces switch status pinging

Accurate, adjustable current limit reduces the external power supply

requirements and increases device flexibility (capacitive, inductive,

and resistive loads)

Accurate current sense enables predictive maintenance (wire break,

sensor aging, etc…)

Integrated VDS clamp enables inductive load driving

QFN package reduces the solution size

Production

QFN-16

3.5mm x 4mm

14mm2

HTSSOP-14

5mm x 6.4mm

32mm2


Ti.com | 11 Ways to Protect Your Power Path

Purpose

• Cookbook for solving power design challenges on system’s power path

Location

• Bottom of Power Switches Portal page

• In each power switch product folder under the ‘technical documents’ tab

How to get there:

• Through Product Tree:

– Products Power Management Power Switches

• Quick link:

– ti.com/powerswitch

http://www.ti.com/powerswitchhttp://www.ti.com/powerswitch


Ti.com | New Custom Quick Search

• www.ti.com/powerswitch

http://www.ti.com/powerswitch


Ti.com | E2E support forums

• e2e.ti.com

https://e2e.ti.com/


New Product Updates now on our website!

35

https://training.ti.com/npu

https://training.ti.com/npuhttps://training.ti.com/npuhttps://training.ti.com/npu


Upcoming Broadcasts

36

Date Topic

2/6/2020 Isolation

2/13/2020 Standard Logic

2/20/2020 Low voltage buck switching regulators

2/27/2020 Temp and Humidity Sensors

3/5/2020 Tbd

3/12/2020 High Voltage Controllers

welcome to the texas instruments new product update · overvoltage protection surge & eft immunity...

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