SI9993CS データシートの表示（PDF） - Vishay Semiconductors

部品番号

コンポーネント説明

メーカー

SI9993CS

12-V VCM/Spindle Motor Driver for Large Capacity HDD

Vishay Semiconductors 

Si9993CS

Vishay Siliconix

PIN DESCRIPTION

Pin No.

18

19

20

Name

PWMIN

SRADJ

DGND

21

VTEST

22

VDD

23

SYSCLK

24

FCOM

27

STEPCLK

28

SENC

29

SENB

30

SENA

31

CT

32

POR

33

ENCOM

37

UVADJ

38

IVCMS

39

ISS-

40

ISS+

41

SPDACIN

42

PWMREF

43

VCC

44

PORCAP

45

REFGND

46

AGND

47

VREF(OUT)

48

VREF/2

49

ISV+

50

ISV-

51

COMP1

52

COMP2

53

+VCMDACIN

54

-VCMDACIN

55, 56

VCLAMP

57

PWRGND

59

VCM+

60

VMOT

61

VCM-

62

HS+

63

LS+

Type

Digital, Input

Analog, Input

Supply

Analog, I/O

Supply

Digital, Input

Digital, Output

Digital, Input

Analog, Input

Analog, Input

Analog, Input

Analog, Output

Digital, Output

Digital, Input

Analog, Output

Analog, Output

Analog, Input

Analog, Input

Analog, Input

Analog I/O

Supply

Analog, Output

Supply

Supply

Analog, Output

Analog, Output

Analog, Input

Analog, Input

Analog, Output

Analog, Input

Analog, Input

Analog, Input

Supply

Supply

Analog, I/O

Supply

Analog, I/O

Analog, Output

Analog, Output

Function

Digital input of stand-alone PWM driver

Spindle Output drive slew rate control

Digital negative supply

External charge storage node for spindle brake function. Also used as a

manufacturer’s test pin

+5 V digital power supply

System clock input (5Mhz) for onboard timers

Commutation clock output for external speed control

Clock input for spindle commutation state machine, used during spindle start-up

only

Input to BEMF-sense circuitry; connect to 0-C

Input to BEMF-sense circuitry, connect to 0-B

Input to BEMF-sense circuitry, connect to 0-A

Center Tap

Power-on-reset pulse for entire drive electronics

Enable input for onboard commutation clock generator

External Undervoltage threshold adjust

VCM current sense output; signal referred to VREF/2

Negative input to spindle current sense amplifier

Positive input to spindle current sense amplifier

Spindle Input (from PWM DAC Out)

Reference supply input for stand-alone PWM driver

+12 V analog power supply for the whole chip

Connect to Power-on-reset timing capacitor

Critical analog ground reference

Analog negative supply and ground reference

Reference supply output for stand-alone PWM DAC and VCM common

Reference supply output for external VCM DAC

Positive input to VCM current sense amplifier

Negative input to VCM current sense amplifier

Connection for external VCM R/C compensation

Connection for external VCM R/C compensation

Positive VCM input (from +VCM DAC Out)

Negative VCM input (from -VCM DAC Out)

+12-V digital power supply for spindle PWM section; also, inductive flyback clamp

and emergency head retract power supply

Ground return referred to external VCM n-channel FETs; used to power VCM class

AB stage.

Feedback from the positive output of VCM driver

+12-V power supply referred to external VCM p-channel FETs; used to power VCM

class AB stage.

Feedback from the negative output of VCM driver

Connection to gate of positive VCM high-side driver

Connection to gate of positive VCM low-side driver

S-60752–Rev. A, 05-Apr-99

8

FaxBack 408-970-5600, request 70653

www.siliconix.com

Share Link: