參數(shù)資料
型號(hào)： SI9993CS
廠商： Vishay Intertechnology,Inc.
英文描述： 12-V VCM/Spindle Motor Driver for Large Capacity HDD
中文描述： 12 V的氯乙烯/主軸電機(jī)驅(qū)動(dòng)器的大容量硬盤
文件頁(yè)數(shù)： 8/16頁(yè)
文件大?。?/td> 419K
代理商： SI9993CS
Si9993CS
Vishay Siliconix
S-60752–Rev. A, 05-Apr-99
8
FaxBack 408-970-5600, request 70653
www.siliconix.com
18
PWMIN
Digital, Input
Digital input of stand-alone PWM driver
19
SRADJ
Analog, Input
Spindle Output drive slew rate control
20
DGND
Supply
Digital negative supply
21
VTEST
Analog, I/O
External charge storage node for spindle brake function. Also used as a
manufacturer’s test pin
22
VDD
Supply
+5 V digital power supply
23
SYSCLK
Digital, Input
System clock input (5Mhz) for onboard timers
24
FCOM
Digital, Output
Commutation clock output for external speed control
27
STEPCLK
Digital, Input
Clock input for spindle commutation state machine, used during spindle start-up
only
28
SENC
Analog, Input
Input to BEMF-sense circuitry; connect to 0-C
29
SENB
Analog, Input
Input to BEMF-sense circuitry, connect to 0-B
30
SENA
Analog, Input
Input to BEMF-sense circuitry, connect to 0-A
31
CT
Analog, Output
Center Tap
32
POR
Digital, Output
Power-on-reset pulse for entire drive electronics
33
ENCOM
Digital, Input
Enable input for onboard commutation clock generator
37
UVADJ
Analog, Output
External Undervoltage threshold adjust
38
IVCMS
Analog, Output
VCM current sense output; signal referred to V
REF/2
Negative input to spindle current sense amplifier
39
ISS-
Analog, Input
40
ISS+
Analog, Input
Positive input to spindle current sense amplifier
41
SPDACIN
Analog, Input
Spindle Input (from PWM DAC Out)
42
PWMREF
Analog I/O
Reference supply input for stand-alone PWM driver
43
VCC
Supply
+12 V analog power supply for the whole chip
44
PORCAP
Analog, Output
Connect to Power-on-reset timing capacitor
45
REFGND
Supply
Critical analog ground reference
46
AGND
Supply
Analog negative supply and ground reference
47
VREF(OUT)
Analog, Output
Reference supply output for stand-alone PWM DAC and VCM common
48
VREF/2
Analog, Output
Reference supply output for external VCM DAC
49
ISV+
Analog, Input
Positive input to VCM current sense amplifier
50
ISV-
Analog, Input
Negative input to VCM current sense amplifier
51
COMP1
Analog, Output
Connection for external VCM R/C compensation
52
COMP2
Analog, Input
Connection for external VCM R/C compensation
53
+VCMDACIN
Analog, Input
Positive VCM input (from +VCM DAC Out)
54
-VCMDACIN
Analog, Input
Negative VCM input (from -VCM DAC Out)
55, 56
VCLAMP
Supply
+12-V digital power supply for spindle PWM section; also, inductive flyback clamp
and emergency head retract power supply
57
PWRGND
Supply
Ground return referred to external VCM n-channel FETs; used to power VCM class
AB stage.
59
VCM+
Analog, I/O
Feedback from the positive output of VCM driver
60
VMOT
Supply
+12-V power supply referred to external VCM p-channel FETs; used to power VCM
class AB stage.
61
VCM-
Analog, I/O
Feedback from the negative output of VCM driver
62
HS+
Analog, Output
Connection to gate of positive VCM high-side driver
63
LS+
Analog, Output
Connection to gate of positive VCM low-side driver
PIN DESCRIPTION
Pin No.
Name
Type
Function
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