L6254 データシートの表示（PDF） - STMicroelectronics

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L6254

12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL “COMBO”

STMicroelectronics 

L6254

BLOCK DIAGRAM

CS

SW1

SDATA

SCLK

SDEN

TR_12V

TR_5V

CHARGE

PUMP

FREQUENCY

LOCK LOOP

SPINDLE SEQUENCER

ISO

DRIVER

SERIAL

INTERFACE

START-UP

REGISTERS

BEMF

PROCESSING

RE_SYNC

DYNAMIC/

REVERSE

BRAKE

VCM CURRENT

CONTROL PSM/LIN

ZERO CROSS

DETECTION

SPINDLE

CURRENT

CONTROL

PWM/LIN

PARKING

VCM

CALIBRATION

BEMF

RECTIFICATION

SUPPLY

FAULT

MONITORS

THERMAL

SUPPLY

14 BIT

VCM DAC

REFERENCE

VOLTAGE

GENERATOR

+

-

A

OUT_A

CTAP

B

OUT_B

RSENSE

C

OUT_C

ISENSE

A+

A-

-

A=4

+

VCM_A+

VCC

VCM_A-

VCM_GND

SENSE_IN-

SENSE_IN+

D99IN1042

PIN CONNECTION

2/17

FCOM

CTAP

PWM/SLEW

OUT_C

I_SENSE

R_SENSE

OUT_B

GND

R_SENSE

OUT_A

INDEX

44 43 42 41 40 39 38 37 36 35 34

1

33

2

32

3

31

4

30

5

29

6

28

7

27

8

26

9

25

10

24

11

23

12 13 14 15 16 17 18 19 20 21 22

SW1

FLL_RES

VCC

VCM_A+

SENSE_IN-

VCM_GND

SENSE_IN+

VCM_A-

VCC

CS

CP

D98IN847

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