MTD6505

Features 180 Sinusoidal Drive for high efficiency and low

acoustic noise

Position Sensorless BLDC Drivers (No Hall effect sensor required)

Integrated Power Transistors

Supports 2V to 5.5V Power Supplies

Programming Resistor (RPROG) settings to fit motor constant (KM) range from 3.25 mV/Hz to 52 mV/Hz

Direction Control:

- Forward direction: connect DIR pin to GND or leave floating

- Reverse direction: connect DIR pin to VBIAS or 3V

Speed Control through Power Supply Modulation (PSM) and/or Pulse-Width Modulation (PWM)

Built-in Frequency Generator (FG Output Signal)

Built-in Lockup Protection and Automatic Recovery Circuit

Built-in Overcurrent Limitation

Built-in Thermal Shutdown Protection

Built-in Over Voltage Protection

No External Tuning Required

Available Package:10-Lead 3mm x 3mm UDFN

Applications Notebook CPU Cooling Fans

5V 3-Phase BLDC

DescriptionThe MTD6505 device is a 3-phase full-wavesensorless driver for brushless DC (BLDC) motors. Itfeatures 180 sinusoidal drive, high torque output andsilent drive. With the adaptive features, parameters andwide range of power supplies (2V to 5.5V), theMTD6505 is intended to cover a broad range of motorcharacteristics, while requiring minimum externalcomponents. Speed control can be achieved througheither PSM or PWM.

The compact packaging and the minimal bill-of-material make the MTD6505 device extremely cost-efficient in fan applications. For example, the CPUcooling fans in notebook computers require designsthat provide low acoustic noise, low mechanicalvibration, and are highly efficient. The frequencygenerator (FG) output enables precision speed controlin closed-loop applications.

The MTD6505 device includes Lockup Protectionmode to turn off the output current when the motor is ina lock condition, with an automatic recovery feature torestart the fan when the lock condition is removed.Motor overcurrent limitation and thermal shutdownprotection are included for safety enhanced operations.

The MTD6505 is available in a compact, thermallyenhanced, 3mm x 3mm 10-lead UDFN package.

Package Types

MTD65053x3 UDFN*

VBIAS

RPROG

OUT2

FG PWMDIRVDD

GND

123

5

10

98

6

OUT1 OUT34 7

EP11

Sinusoidal Sensorless 3-Phase Brushless DC (BLDC) Fan Motor Driver 2011-2013 Microchip Technology Inc. DS20002281B-page 1

*Includes Exposed Thermal Pad (EP); see Table 3-1.

MTD6505

Functional Block Diagram

Thermal protection

VBIAS

OUT1

OUT2CPU + peripherals

PWM

FG

OUT3

VDD

Short-circuitprotection

Out

put D

rive

Circ

uit

Motor PhaseDetection

Circuit

Overcurrentprotection

GNDDIR

Non-volatile memory

RPROG senseRPROG

VDD

Adjustable KmDS20002281B-page 2 2011-2013 Microchip Technology Inc.

MTD6505

Typical Application

MTD

6505

1

2

3

4

5

10

9

8

7

6

FG

VBIAS

OUT1

OUT2 GND

OUT3

VDD

DIR

PWMR2

C1

VDD

C2

VDD

R1

KM0 KM3KM1, 2

RPROG

VBIASVBIAS

Recommended External Components for Typical Application

Element Type/Value Comment

C1 >1 F Connect as close as possible to IC input pinsC2 >1 F Connect as close as possible to IC input pinsR1 >10 k Connect to Vlogic on microcontroller side (FG pull up)R2 3.9 k or 24 k Select appropriate programming resistor value, see

Table 4-2 2011-2013 Microchip Technology Inc. DS20002281B-page 3

MTD6505

NOTES:DS20002281B-page 4 2011-2013 Microchip Technology Inc.

MTD65051.0 ELECTRICAL CHARACTERISTICS

Absolute Maximum RatingsPower Supply Voltage (VDD_MAX) ...................... -0.7 to +7.0VMaximum Output Voltage (VOUT_MAX) ............... -0.7 to +7.0VMaximum Output Current(2) (IOUT_MAX) ....................1000 mAFG Maximum Output Voltage (VFG_MAX) ........... -0.7 to +7.0VFG Maximum Output Current (IFG_MAX) ......................5.0 mAVBIAS Maximum Voltage (VBIAS_MAX) ................ -0.7 to +4.0VPWM Maximum Voltage (VPWM_MAX) ................ -0.7 to +7.0VAllowable Power Dissipation(1)(PD_MAX).........................1.5WMax Junction Temperature (TJ)................................... +150CESD protection on all pins ...................................................2 kV

Notice: Stresses above those listed under MaximumRatings may cause permanent damage to the device.This is a stress rating only and functional operation ofthe device at those or any other conditions above thoseindicated in the operational listings of this specificationis not implied. Exposure to maximum rating conditionsfor extended periods may affect device reliability.

Note 1: Reference PCB, according to JEDECstandard EIA/JESD 51-9.

2: IOUT is also internally limited, according to thelimits defined in the Electrical Charac-teristics table.

ELECTRICAL CHARACTERISTICSElectrical Specifications: Unless otherwise specified, all limits are established for VDD = 2.0V to 5.5V, TA = +25C

Parameters Sym Min Typ Max Units Conditions

Power Supply Voltage VDD 2 5.5 V

Power Supply Current IVDD 5 10 mA VDD = 5V

Standby Current IVDD_STB 30 40 A PWM = 0V, VDD = 5V (Standby mode)

OUT1, 2, 3High Resistance

RON(H) 0.75 1.1 IOUT = 0.5A, VDD = 5VNote 3

OUT1, 2, 3Low Resistance

RON(L) 0.75 1.3 IOUT = 0.5A, VDD = 5VNote 3

OUT1, 2, 3Total Resistance

RON(H+L) 1.5 IOUT = 0.5A, VDD = 5V

VBIAS InternalSupply Voltage

VBIAS 3 V VDD = 3.2V to 5.5V

VDD 0.2 V VDD < 3.2V

PWM Input Frequency fPWM 1 100 kHz

PWM Input H Level VPWM_H 0.55*VDD VDD V VDD 4.5V

PWM Input L Level VPWM_L 0 0.2*VDD V VDD 4.5V

PWM Internal Pull-Up Resistor

RPWM_0 266 k PWM = 0V

PWM Internal Pull-Up Resistor

RPWM 133 k PWM duty-cycle > 0%

DIR Input H Level VDIR_H 0.55*VDD VDD V VDD 4.5V

DIR Input L Level VDIR_L 0 0.2*VDD V VDD 4.5V

DIR Internal Pull-Down Resistor

RDIR 100 200 k

FG Output Pin Low Level Voltage

VOL_FG 0.25 V IFG = -1 mA

Note 1: 750 mA is the standard option for MTD6505. Additional overcurrent protection levels are available upon request. Please contact factory for different overcurrent protection values.

2: Related to the internal oscillator frequency (see Figure 2-1).3: Minimum and maximum parameter is not production tested and is specified by design and validation. 2011-2013 Microchip Technology Inc. DS20002281B-page 5

MTD6505FG Output Pin Leakage Current

ILH_FG -10 10 A VFG = 5.5V

Lock Protection Operating Time

TRUN 0.5 s

Lock Protection Waiting Time

TWAIT 4.5 5 5.5 s Note 2

Overcurrent Protection IOC_MOT 750 mA

Overvoltage Protection VOV 7.2 V

Short Protection on High Side

IOC_SW_H 2.57 A

Short Protection on Low Side

IOC_SW_L -2.83 A

Thermal Shutdown TSD 170 C

Thermal Shutdown Hysteresis

TSD_HYS 25 C

TEMPERATURE SPECIFICATIONSElectrical Specifications: Unless otherwise specified, all limits are established for VDD = 5.5V to 2.0V, TA = +25C.

Parameters Sym Min Typ Max Units Conditions

Temperature RangesOperating Temperature TOPR -40 +125 CStorage Temperature Range TSTG -55 +150 CThermal Package ResistancesThermal Resistance, 10L-UDFN JA 96.6 C/W

JC 12 C/W

ELECTRICAL CHARACTERISTICS (CONTINUED)Electrical Specifications: Unless otherwise specified, all limits are established for VDD = 2.0V to 5.5V, TA = +25C

Parameters Sym Min Typ Max Units Conditions

Note 1: 750 mA is the standard option for MTD6505. Additional overcurrent protection levels are available upon request. Please contact factory for different overcurrent protection values.

2: Related to the internal oscillator frequency (see Figure 2-1).3: Minimum and maximum parameter is not production tested and is specified by design and validation.DS20002281B-page 6 2011-2013 Microchip Technology Inc.

MTD65052.0 TYPICAL PERFORMANCE CURVES

Note: Unless indicated, TA = +25C, VDD = 5.5V to 2.0V, OUT1, 2, 3 and PWM open.

FIGURE 2-1: Oscillator Frequency Deviation vs. Temperature.

FIGURE 2-2: Internal Regulated Voltage (VBIAS) vs Temperature.

FIGURE 2-3: Internal Regulated Voltage (VBIAS) vs Supply Voltage (VDD).

FIGURE 2-4: Inputs (PWM, DIR) VIL vs. Temperature.

FIGURE 2-5: Inputs (PWM, DIR) VIH vs. Temperature.

FIGURE 2-6: Outputs RON High Side Resistance vs. Temperature.

Note: The graphs and tables provided following this note are a statistical summary based on a limited number ofsamples and are provided for informational purposes only. The performance characteristics listed hereinare not tested or guaranteed. In some graphs or tables, the data presented may be outside the specifiedoperating range (e.g., outside specified power supply range) and therefore outside the warranted range.

-3-2.5

-2-1.5

-1-0.5

00.5

1

or F

requ

eny

Dev

iatio

n (%

)

VDD = 5.5V

VDD = 2V

-4.5-4

-3.5-3

-2.5-2

-1.5-1

-0.50

0.51

-40 -25 -10 5 20 35 50 65 80 95 110 125

Osc

illat

or F

requ

eny

Dev

iatio

n (%

)

Temperature (C)

VDD = 5.5V

VDD = 2V

3 04

3.06

3.08

3.1

3.12

3.14

V BIA

S(V

)

3

3.02

3.04

3.06

3.08

3.1

3.12

3.14

-40 -25 -10 5 20 35 50 65 80 95 110 125

V BIA

S(V

)

Temperature (C)

1

1.5

2

2.5

3

3.5

V BIA

S(V

)

0

0.5

1

1.5

2

2.5

3

3.5

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

V BIA

S(V

)

VDD(V)

1

1.5

2

2.5

PWM

VIL

(V)

VDD = 5.5VDD = 5.5VDD = 5.5V

VDD = 2V

0

0.5

1

1.5

2

2.5

-40 -25 -10 5 20 35 50 65 80 95 110 125

PWM

VIL

(V)

Temperature (C)

VDD = 5.5VDD = 5.5VDD = 5.5V

VDD = 2V

1

1.5

2

2.5

3PW

M V

IH(V

)

VDD = 5.5V

VDD = 2V

0

0.5

1

1.5

2

2.5

3

-40 -25 -10 5 20 35 50 65 80 95 110 125

PWM

VIH

(V)

Temperature (C)

VDD = 5.5V

VDD = 2V

1 52

2.53

3.54

4.55

5.56

RO

N H

igh

Side

() VDD = 2V

00.5

11.5

22.5

33.5

44.5

55.5

6

-40 -25 -10 5 20 35 50 65 80 95 110 125

RO

N H

igh

Side

()

Temperature (C)

VDD = 5.5V

VDD = 2V 2011-2013 Microchip Technology Inc. DS20002281B-page 7

MTD6505

Note: Unless indicated, TA = +25C, VDD = 5.5V to 2.0V, OUT1, 2, 3 and PWM open.

FIGURE 2-7: Outputs RON Low Side Resistance vs. Temperature.

FIGURE 2-8: Supply Current vs. Temperature.

FIGURE 2-9: Stand-By Current vs. Temperature.

FIGURE 2-10: PWM Pull-Up Current vs. Temperature.

FIGURE 2-11: Typical Output on Start-up.

FIGURE 2-12: Typical Outputs on Closed Loop.

22.5

33.5

44.5

55.5

6

ON

Low

Sid

e (

)

VDD = 2V

00.5

11.5

22.5

33.5

44.5

55.5

6

-40 -25 -10 5 20 35 50 65 80 95 110 125

RO

N L

ow S

ide

()

Temperature (C)

VDD = 5.5V

VDD = 2V

2

3

4

5

6

7

VDD

Cur

rent

(mA

)

VDD = 2V

VDD = 5.5V

0

1

2

3

4

5

6

7

-40 -25 -10 5 20 35 50 65 80 95 110 125

I VD

DC

urre

nt (m

A)

Temperature (C)

VDD = 2V

VDD = 5.5V

20

30

40

50

60

D_S

TBC

urre

nt (

A)

VDD = 5.5V

0

10

20

30

40

50

60

-40 -25 -10 5 20 35 50 65 80 95 110 125

I VD

D_S

TBC

urre

nt (

A)

Temperature (C)

VDD = 5.5V

VDD = 2V

-30

-25

-20

-15

-10

-5

0

Pull-

Up

Cur

rent

(A

)

VDD = 2V

-40

-35

-30

-25

-20

-15

-10

-5

0

-40 -25 -10 5 20 35 50 65 80 95 110 125

PWM

Pul

l-Up

Cur

rent

(A

)

Temperature (C)

VDD = 2V

VDD = 5.5VDS20002281B-page 8 2011-2013 Microchip Technology Inc.

MTD65053.0 PIN DESCRIPTIONSThe descriptions of the pins are listed in Table 3-1.

TABLE 3-1: MTD6505 PIN FUNCTION TABLEPin

Number Type Name Function

1 O FG Motor speed indication output2 I RPROG Km parameter setting with external resistors, see Table 4-2 for values3 VBIAS Internal regulator output (for decoupling only)4 O OUT1 Single phase coil output pin5 O OUT2 Single phase coil output pin6 GND Negative voltage supply (ground)7 O OUT3 Single phase coil output pin8 VDD Positive voltage supply for motor driver9 I DIR Motor Rotation Direction

- Forward direction: connect pin to GND or leave floating- Reverse direction: connect pin to VBIAS

10 I PWM PWM input signal for speed control11 EP Exposed pad (Connect to the ground plan for better thermal dissipation)

Legend: I = Input; O = Output 2011-2013 Microchip Technology Inc. DS20002281B-page 9

MTD6505

NOTES:DS20002281B-page 10 2011-2013 Microchip Technology Inc.

MTD65054.0 FUNCTIONAL DESCRIPTIONThe MTD6505 generates a full-wave signal to drive a3-phase BLDC motor. High efficiency and low-powerconsumption are achieved due to CMOS transistorsand synchronous rectification drive type.

4.1 Speed ControlThe rotational speed of the motor can be controlledeither through the PWM digital input signal or by actingdirectly on the power supply (VDD). When the PWMsignal is High (or left open), the motor rotates at fullspeed. When the PWM signal is low, the IC outputs areset to high-impedance and the motor is stopped.

By changing the PWM duty cycle, the speed can beadjusted. Thus, the user has freedom to choose thePWM system frequency within a wide range (from1 kHz to 100 kHz).

Since the PWM pin has an internal pull-up resistorconnected to VDD, it is recommended to drive itbetween 0V and High-Z. The PWM driver must be ableto support the pull-up resistor current, to drive the pin.See PWM Internal Pull-Up Resistor in Section 1.0,Electrical Characteristics.The output transistor activation always occurs at a fixedrate of 30 kHz, which is outside the range of audiblefrequencies.

4.2 Motor Rotation DirectionThe current-carrying order of the outputs depends onthe DIR pin state (Rotation Direction) and is describedin Table 4-1. The DIR pin is not designed for dynamicdirection change during operation.

4.3 Frequency Generator FunctionThe Frequency Generator output (FG) is a Hall effectsensor equivalent digital output, giving information toan external controller about the speed and phase of themotor. The FG pin is an open drain output, connectingto a logical voltage level through an external pull-upresistor. When a lock or an out-of-sync situation isdetected by the driver, this output is set to high-impedance until the motor is restarted. Leave the pinopen when it is not used.

4.4 Lockup Protection and Automatic Restart

If the motor is blocked and cannot rotate freely, a lock-up protection circuit detects it and disables the driver bysetting its outputs to high-impedance to prevent themotor coil from burnout. After a waiting time (TWAIT),the lock-up protection is released and normal operationresumes for a given time (TRUN). If the motor is stillblocked, a new period of waiting time is started. TWAITand TRUN timings are fixed internally, so that noexternal capacitor is required.

4.5 Overcurrent ProtectionThe motor peak current is limited by the driver to750 mA (standard value), thus limiting the maximumpower dissipation in the coils.

4.6 Thermal ShutdownThe MTD6505 device has a thermal protection functionwhich detects when the die temperature exceedsTJ = +170C. When this temperature is reached, thecircuit enters the Thermal Shutdown mode, and theoutputs OUT1, OUT2 and OUT3 are disabled (high-impedance), avoiding the IC destruction and allowingthe circuit to cool down. When the junction temperature(TJ) drops below +145C, normal operation resumes.

The thermal detection circuit has +25C hysteresis.

FIGURE 4-1: Thermal Protection Hysteresis.

Note 1: The PWM frequency has no direct effecton the motor speed and is asynchronouswith the activation of the outputtransistors.

Note 2: The standard output frequency is 30 kHz.A 20 kHz output frequency option isavailable upon request.

TABLE 4-1: MOTOR ROTATION DIRECTION OPTIONS (DIR PIN)

DIR Pin State RotationDirectionOutputs Activation

Sequence

Connected to GND or Floating

Forward OUT1 OUT2 OUT3

Connected to VBIAS

Reverse OUT3 OUT2 OUT1

TJ+145

Thermal shutdown

+170

Normal operation 2011-2013 Microchip Technology Inc. DS20002281B-page 11

MTD6505

4.7 Internal Voltage RegulatorVBIAS voltage is generated internally and is used tosupply internal logical blocks. The VBIAS pin is used toconnect an external decoupling capacitor (1 F orhigher). Notice that this pin is for IC internal use, and isnot designed to supply DC current to external blocks.

4.8 Back Electromotive Force (BEMF) Coefficient Setting

KM is the electro-mechanical coupling coefficient of themotor (also referred to as motor constant or BEMFconstant). Depending on the conventions in use, theexact definition of KM and its measurement criteria canvary among motor manufacturers. To accommodatevarious motor applications, the MTD6505 providesoptions to facilitate diverse BEMF coefficients.

The MTD6505 defines BEMF coefficient (KM) as thepeak value of the phase-to-phase BEMF voltage,normalized to the electrical speed of the motor. Thefollowing table offers methods to set the KM value forthe MTD6505 device.

The RPROG sensing is actually a sequence that iscontrolled by the firmware. For any given RPROG, theinternal control block will output the corresponding KMrange.

4.9 Defining the Correct RPROG Value

This section explains how to define the correct KMvalue for a specific fan. The KM is linked to the RPROG(see Table 4-2). An incorrect KM selection can createissues, or reduce the efficiency.

4.9.1 OPERATION

Follow the next steps to define the right RPROG value:

1. Apply a constant stream of air to a fan that is notconnected.

2. Using an oscilloscope, measure the waveformbetween two phases, when the fan is rotating.

3. Measure the generated peak-to-peak voltage(Vp-p) value and the frequency (f).

4. Compute KM based on the measured Vp-p andf (in mV/Hz):

EQUATION 4-1: KM COMPUTE

KM should be constant for all fan rotation speeds; but,for the KM measurement, the fan rotation speed (due tothe air stream) should be close to the nominal.

TABLE 4-2: Km SETTINGS

KM Option

KM (mV/Hz) RangePhase-to-Phase RPROG

Min Max

KM0 3.25 6.5 GNDKM1 6.5 13 24 kKM2 13 26 3.9 kKM3 26 52 VBIAS

Note: This is a theoretical procedure that doesnot take care of the harmonics generatedby the BEMF. This information has to betaken for indication only.

KMVp p2f-------------=DS20002281B-page 12 2011-2013 Microchip Technology Inc.

MTD65055.0 PACKAGING INFORMATION

5.1 Package Marking Information

Device Code

MTD6505T-E/NA AAAD

10-Lead UDFN (3x3x0.5 mm) Example

AAAD1315256

Legend: XX...X Customer-specific informationY Year code (last digit of calendar year)YY Year code (last 2 digits of calendar year)WW Week code (week of January 1 is week 01)NNN Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn)* This package is Pb-free. The Pb-free JEDEC designator ( )

can be found on the outer packaging for this package.

Note: In the event the full Microchip part number cannot be marked on one line, it will be carried overto the next line, thus limiting the number of available characters for customer-specificinformation.

3e

3e 2011-2013 Microchip Technology Inc. DS20002281B-page 13

MTD6505DS20002281B-page 14 2011-2013 Microchip Technology Inc.

MTD6505 2011-2013 Microchip Technology Inc. DS20002281B-page 15

MTD6505DS20002281B-page 16 2011-2013 Microchip Technology Inc.

MTD6505APPENDIX A: REVISION HISTORY

Revision B (October 2013)The following is the list of modifications:

1. Updated the Absolute Maximum Ratingssection with the correct VBIAS parameter.

2. Updated the Thermal Resistance values in theTemperature Specifications table.

3. Added Figure 2-11 and Figure 2-12.4. Added Section 4.9 Defining the Correct

RPROG Value.5. Minor grammatical and editorial corrections.

Revision A (November 2011)This is the original release of this document. 2011-2013 Microchip Technology Inc. DS20002281B-page 17

MTD6505

NOTES:DS20002281B-page 18 2011-2013 Microchip Technology Inc.

MTD6505PRODUCT IDENTIFICATION SYSTEMTo order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Device: MTD6505T: 3-Phase Brushless DC, Sinusoidal Sensorless

Fan Motor Driver (Tape and Reel)

Temperature Range: E = Extended -40C to +125C

Package: NA = Plastic Dual Flat, thermally-enhanced, 3x3x0.5 mm Body (UDFN)

Examples:a) MTD6505T-E/NA Tape and Reel,

Extended Temperature10LD UDFN Package

PART NO. T -X /XX

PackageTemperatureTape & ReelDevice 2011-2013 Microchip Technology Inc. DS20002281B-page 19

MTD6505

NOTES:DS20002281B-page 20 2011-2013 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices: Microchip products meet the specification contained in their particular Microchip Data Sheet.

Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

There are dishonest and possibly illegal methods used to breachknowledge, require using the Microchip products in a manner ouSheets. Most likely, the person doing so is engaged in theft of in

Microchip is willing to work with the customer who is concerned

er canle.

mitteay b

workInformation contained in this publication regarding deviceapplications and the like is provided only for your convenienceand may be superseded by updates. It is your responsibility toensure that your application meets with your specifications.MICROCHIP MAKES NO REPRESENTATIONS ORWARRANTIES OF ANY KIND WHETHER EXPRESS ORIMPLIED, WRITTEN OR ORAL, STATUTORY OROTHERWISE, RELATED TO THE INFORMATION,INCLUDING BUT NOT LIMITED TO ITS CONDITION,QUALITY, PERFORMANCE, MERCHANTABILITY ORFITNESS FOR PURPOSE. Microchip disclaims all liabilityarising from this information and its use. Use of Microchipdevices in life support and/or safety applications is entirely atthe buyers risk, and the buyer agrees to defend, indemnify andhold harmless Microchip from any and all damages, claims,suits, or expenses resulting from such use. No licenses areconveyed, implicitly or otherwise, under any Microchipintellectual property rights.

Neither Microchip nor any other semiconductor manufacturmean that we are guaranteeing the product as unbreakab

Code protection is constantly evolving. We at Microchip are comproducts. Attempts to break Microchips code protection feature mallow unauthorized access to your software or other copyrighted 2011-2013 Microchip Technology Inc.

QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV

== ISO/TS 16949 == Trademarks

The Microchip name and logo, the Microchip logo, dsPIC, FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MTP, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.

Analog-for-the-Digital Age, Application Maestro, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O, Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA and Z-Scale are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

the code protection feature. All of these methods, to our tside the operating specifications contained in Microchips Data tellectual property.

about the integrity of their code.

guarantee the security of their code. Code protection does not

d to continuously improving the code protection features of oure a violation of the Digital Millennium Copyright Act. If such acts, you may have a right to sue for relief under that Act.DS20002281B-page 21

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

GestIC and ULPP are registered trademarks of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries.

All other trademarks mentioned herein are property of their respective companies.

2011-2013, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

Printed on recycled paper.

ISBN: 978-1-62077-533-2

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Companys quality system processes and procedures are for its PIC MCUs and dsPIC DSCs, KEELOQ code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchips quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

DS20002281B-page 22 2011-2013 Microchip Technology Inc.

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.comAtlantaDuluth, GA Tel: 678-957-9614 Fax: 678-957-1455BostonWestborough, MA Tel: 774-760-0087 Fax: 774-760-0088ChicagoItasca, IL Tel: 630-285-0071 Fax: 630-285-0075ClevelandIndependence, OH Tel: 216-447-0464 Fax: 216-447-0643DallasAddison, TX Tel: 972-818-7423 Fax: 972-818-2924DetroitFarmington Hills, MI Tel: 248-538-2250Fax: 248-538-2260IndianapolisNoblesville, IN Tel: 317-773-8323Fax: 317-773-5453Los AngelesMission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608Santa ClaraSanta Clara, CA Tel: 408-961-6444Fax: 408-961-6445TorontoMississauga, Ontario, CanadaTel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFICAsia Pacific OfficeSuites 3707-14, 37th FloorTower 6, The GatewayHarbour City, KowloonHong KongTel: 852-2401-1200Fax: 852-2401-3431Australia - SydneyTel: 61-2-9868-6733Fax: 61-2-9868-6755China - BeijingTel: 86-10-8569-7000 Fax: 86-10-8528-2104China - ChengduTel: 86-28-8665-5511Fax: 86-28-8665-7889China - ChongqingTel: 86-23-8980-9588Fax: 86-23-8980-9500China - HangzhouTel: 86-571-2819-3187 Fax: 86-571-2819-3189China - Hong Kong SARTel: 852-2943-5100 Fax: 852-2401-3431China - NanjingTel: 86-25-8473-2460Fax: 86-25-8473-2470China - QingdaoTel: 86-532-8502-7355Fax: 86-532-8502-7205China - ShanghaiTel: 86-21-5407-5533 Fax: 86-21-5407-5066China - ShenyangTel: 86-24-2334-2829Fax: 86-24-2334-2393China - ShenzhenTel: 86-755-8864-2200 Fax: 86-755-8203-1760China - WuhanTel: 86-27-5980-5300Fax: 86-27-5980-5118China - XianTel: 86-29-8833-7252Fax: 86-29-8833-7256China - XiamenTel: 86-592-2388138 Fax: 86-592-2388130China - ZhuhaiTel: 86-756-3210040 Fax: 86-756-3210049

ASIA/PACIFICIndia - BangaloreTel: 91-80-3090-4444 Fax: 91-80-3090-4123India - New DelhiTel: 91-11-4160-8631Fax: 91-11-4160-8632India - PuneTel: 91-20-3019-1500Japan - OsakaTel: 81-6-6152-7160 Fax: 81-6-6152-9310Japan - TokyoTel: 81-3-6880- 3770 Fax: 81-3-6880-3771Korea - DaeguTel: 82-53-744-4301Fax: 82-53-744-4302Korea - SeoulTel: 82-2-554-7200Fax: 82-2-558-5932 or 82-2-558-5934Malaysia - Kuala LumpurTel: 60-3-6201-9857Fax: 60-3-6201-9859Malaysia - PenangTel: 60-4-227-8870Fax: 60-4-227-4068Philippines - ManilaTel: 63-2-634-9065Fax: 63-2-634-9069SingaporeTel: 65-6334-8870Fax: 65-6334-8850Taiwan - Hsin ChuTel: 886-3-5778-366Fax: 886-3-5770-955Taiwan - KaohsiungTel: 886-7-213-7828Fax: 886-7-330-9305Taiwan - TaipeiTel: 886-2-2508-8600 Fax: 886-2-2508-0102Thailand - BangkokTel: 66-2-694-1351Fax: 66-2-694-1350

EUROPEAustria - WelsTel: 43-7242-2244-39Fax: 43-7242-2244-393Denmark - CopenhagenTel: 45-4450-2828 Fax: 45-4485-2829France - ParisTel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79Germany - MunichTel: 49-89-627-144-0 Fax: 49-89-627-144-44Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781Netherlands - DrunenTel: 31-416-690399 Fax: 31-416-690340Spain - MadridTel: 34-91-708-08-90Fax: 34-91-708-08-91UK - WokinghamTel: 44-118-921-5869Fax: 44-118-921-5820

Worldwide Sales and Service

08/20/13

Sinusoidal Sensorless 3-Phase Brushless DC (BLDC) Fan Motor Driver1.0 Electrical Characteristics2.0 Typical Performance Curves3.0 Pin Descriptions4.0 Functional Description4.1 Speed Control4.2 Motor Rotation Direction4.3 Frequency Generator Function4.4 Lockup Protection and Automatic Restart4.5 Overcurrent Protection4.6 Thermal Shutdown4.7 Internal Voltage Regulator4.8 Back Electromotive Force (BEMF) Coefficient Setting4.9 Defining the Correct RPROG Value

5.0 Packaging Information5.1 Package Marking Information

Appendix A: Revision HistoryWorldwide Sales and Service