TDA5146T

Manufacturer Part NumberTDA5146T
DescriptionBrushless DC motor drive circuit
ManufacturerPhilips Semiconductors
TDA5146T datasheet
 


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INTEGRATED CIRCUITS
TDA5146T
Brushless DC motor drive circuit
Product specification
1994 May 18
hilips
Semiconductors

TDA5146T Summary of contents

  • Page 1

    ... TDA5146T Brushless DC motor drive circuit Product specification hilips Semiconductors INTEGRATED CIRCUITS 1994 May 18 ...

  • Page 2

    ... General purpose spindle driver (e.g., HDD, tape driver) GENERAL DESCRIPTION The TDA5146T is a bipolar integrated circuit used to drive brushless DC motors in full–wave mode. The device senses the rotor position using an EMF –sensing technique and is ideally suited as a drive circuit for a hard disk drive motor or tape drive. ...

  • Page 3

    ... Philips Semiconductors Brushless DC motor drive circuit VSUP PWMOUT 1994 May 18 BRAKE RESET VMOT GND2 VP GND1 Figure 1. Block diagram 3 Product specification TDA5146T ...

  • Page 4

    ... CAP– CAP–TI GND2 4 25 GND PWMOUT DIR BRAKE SUP 7 22 PWM_IN V MOT 8 21 RESET MOT2 9 20 MOT3 MOT0 13 16 TEST GND1 14 15 MOT1 Figure 2. Pin configuration 4 Product specification TDA5146T SL01520 ...

  • Page 5

    ... The TDA5146T offers a sensorless three phase motor drive function unique in its combination of sensorless motor drive and full–wave drive. The TDA5146T offers protected outputs capable of handling high currents and can be used with star or delta connected motors. It can easily be adapted for different motors and applications. The TDA5146T offers the following features: Sensorless commutation by using the motor EMF Built– ...

  • Page 6

    ... Philips Semiconductors Brushless DC motor drive circuit 1994 May 18 3.5 3.0 2.5 P tot 2.0 (H) 1.5 1.0 0 (o) amb Figure 3. Power derating curve (SOT136-1) 6 Product specification TDA5146T SL01519 ...

  • Page 7

    ... Fig 500 mA 0 note 5 – 4V< V <18V 2.0 P 4V<V <18V – P – – 4V< V <18V 2.0 P 4V<V <18V – 2.0 V – 0.8V – Product specification TDA5146T Typ Max Unit – 5.9 7.5 mA – 1.2 2.0 mA 140 150 C TSD–30 – C – VMOT mA – – – 3 ...

  • Page 8

    ... PWMOUT=1V 25 – Rs=51 – 100 C1=2nF 1.6 2.1 –2.6 –2.1 – 0.20 – 0.30 – 2.20 – 28 – –57 – –5 – 50 – 0.30 – 2.20 8 Product specification TDA5146T Max Unit – – mA – 0.4 V – – – – % – – – – ...

  • Page 9

    ... Output transition time measurement. See Figure 5. 12 1994 May 18 Conditions Min 10.6 –5.3 1.85 0.85 2.3 10.1 –20.9 0.9 0.85 2.3 and I = 0mA Hysteresis 75 V typ MOT 1 MOT 2 and MOT 3 Comparators threshold voltage Figure 4. 12 Figure 5. 9 Product specification TDA5146T Typ Max Unit 16 –8.1 –11 A 2.05 2.25 – 0.9 V 2.4 2.55 V 15.5 20.9 A –15.5 –10.1 A 1.025 1.15 A – 0.9 V 2.4 2 ...

  • Page 10

    ... Because of high inductive loading the output stages contain flyback diodes. The output stages are also protected by a current limiting circuit and by thermal protection of the six output transistors. The zero–crossings can be used to provide speed information such as the tacho signal FG. 1994 May 18 10 Product specification TDA5146T ...

  • Page 11

    ... TEST PROTECTION ROTATION micro– SPEED/ processor DETECTOR 4.7 OUTPUT k STAGE +5 V TDA5146T Figure 7. Typical Application diagram of the TDA5146T with use of the FET driver stage 1994 May 18 128 mH MOSFET SCHOTTKY 8.1 mF 100 mF BRAKE RESET PWMOUT FET DRIVER STAGE BRAKE RESET START-UP ...

  • Page 12

    ... If the movement of the motor generates enough EMF the TDA5146T will run the motor. If the amount of EMF generated is insufficient, then the motor will move one step only and will oscillate in its new position ...

  • Page 13

    ... Example: If after switching off, the voltage from a motor winding is reduced, in 3.5 ms, to within 20 mv (the offset of the EMF comparator), then the value of the required timing capacitor is given by 2.63 3.5 = 9.2 Typical voltage waveforms are illustrated by Figure 9. VMOT1 VOLTAGE ON CAP–TI Figure 9. Typical Cap–TI and VMOT1 voltage waveforms in normal running mode 1994 May 18 (choose 10 nF) 13 Product specification TDA5146T SL01522 SL01523 ...

  • Page 14

    ... Reliability FG Signal The FG signal is generated in the TDA5146T by using the zero–crossing of the motor EMF from the three motor windings. Every zero–crossing in a (star connected) motor winding is used to toggle the FG output signal. The FG frequency is therefore half the commutation frequency. All transitions indicate the detection of a zero–crossing (except for PG). The negative–going edges are called FG pulses because they generate an interrupt in a controlling microprocessor. The accuracy of the FG output signal (jitter) is very good. This accuracy depends on the symmetry of the motor’ ...

  • Page 15

    ... TEST RESET Product specification TDA5146T SL01524 FUNCTION Reset Normal direction mode sequence Reset Reverse direction mode sequence FUNCTION Normal Reset Test Test Brake Brake Brake Brake ...

  • Page 16

    ... The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified storage maximum. If the printed–circuit board has been pre–heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 1994 May 18 16 Product specification TDA5146T ...

  • Page 17

    ... Philips Semiconductors Brushless DC motor drive circuit SO28: plastic small outline package; 28 leads; body width 7.5 mm 1994 May 18 17 Product specification TDA5146T SOT136-1 ...

  • Page 18

    ... Contact information For additional information please visit http://www.semiconductors.philips.com. For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com. hilips Semiconductors 1994 May 18 Fax: + 24825 Document order number: 18 Product specification TDA5146T Koninklijke Philips Electronics N.V. 1994 All rights reserved. Printed in U.S.A. Date of release: 05-94 9397 750 08834 ...