- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄365564 > Si9990ACS (Vishay Intertechnology,Inc.) 5-V VCM Driver/Spindle Motor Driver For 1.8- and 2.5-Hard Disk Drives(用于1.8V和2.5V的硬盤驅(qū)動的5V語音線圈電機驅(qū)動器/心軸電機驅(qū)動器) PDF資料下載
參數(shù)資料
| 型號： | Si9990ACS |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | 5-V VCM Driver/Spindle Motor Driver For 1.8- and 2.5-Hard Disk Drives(用于1.8V和2.5V的硬盤驅(qū)動的5V語音線圈電機驅(qū)動器/心軸電機驅(qū)動器) |
| 中文描述： | 5V的氯乙烯驅(qū)動器/主軸電機驅(qū)動器1.8和2.5硬盤驅(qū)動器（用于1.8伏和2.5伏的硬盤驅(qū)動的5V的語音線圈電機驅(qū)動器/心軸電機驅(qū)動器） |
| 文件頁數(shù)： | 8/11頁 |
| 文件大小： | 345K |
| 代理商： | SI9990ACS |
Si9990ACS
Vishay Siliconix
S-60752—Rev. C, 05-Apr-99
8
FaxBack 408-970-5600, request 70655
www.siliconix.com
PIN DESCRIPTION
POWER SUPPLIES
Function
Pin Number
Description
V
DD
V
MOT
61
+5-V supply for VCM and spindle controller logic.
7, 8, 57, 58
+5-V supply for VCM and spindle drivers.
V
CLAMP
53
Inductive flyback clamp and emergency head retract power supply. This pin is shorted to V
MOT
by
an on-chip switch during normal operation. The switch eliminates the need for an external
Schottky diode.
AGND
24
Low noise ground return for critical analog functions
GND
3, 4, 11, 12, 36, 37,
38, 39, 42, 43
Ground return for the entire chip. All ground pins are connected to each other through the die
substrate and lead frame. The large number of direct connections to the lead frame lowers
thermal impedance and improves power dissipation.
CHS
56
Output of the dc-todc converter, used to power VCM and spindle drive MOSFETs. The converter
is a 3X charge pump capable of sourcing 5 mA. An external >0.1 μF capacitor between Pin 56
and ground is necessary.
CP2H
59
Positive side of the external 3X charge pump capacitor.
CP1H
60
Positive side of the external 2X charge pump capacitor.
CP2
54
500-kHz oscillator output, used to drive the 3X charge pump.
CP1
55
Inverted output of the on-chip 500-kHz oscillator, used to drive the external 2X charge pump
capacitor.
V
ADIN
23
Low noise +5-V supply pin for the on-chip reference generator.
V
R
22
Output of the on-chip reference generator: V
R
= V
ADIN
/2. This is used as the dc reference level for
all analog signals.
VOICE COIL MOTOR DRIVER
Function
Pin Number
Description
GAIN
SELECT
2
Input pin used to select VCM transconductance. A high input sets the gain to the maximum and a
low input sets the gain to be
1
/
4
of the maximum.
Inverting input of servo PWM filter amplifier.
V
DAC
16
OA3
15
Output of servo PWM filter amplifier. Connect R
network from this pin to V
DAC
to set filter
bandwidth. A positive OA3 relative to V
R
will set V
CM
output current positive.
Inverting input of V
CM
loop compensation amplifier.
Output of V
loop compensation amplifier. Connect lead-lag network from this pin to IA4 to set
desired loop bandwidth.
IA4
14
OA4
13
I
SENSE
IN+
62
Positive input terminal for V
CM
current sense amplifier. This pin connects to external sense
resistor and V
CM
.
Negative input terminal for V
CM
current sense amplifier. This pin connects to the other side of
sense resistor and OUT+ pin.
I
SENSE
IN-
63
I
SENSE
OUT
OUT+
64
Output terminal of V
CM
current sense amplifier.
V
CM
power amplifier positive output terminal. Current from OUT+ is positive.
V
power amplifier negative output terminal. During head retract, V
CM
output current will be
negative, or flowing from this pin into the V
CM
load.
Control pin for head retract current (nominally 0.25 V). An external resistor is connected to this
pin. The current is amplified 200 times at the V
CM
driver.
An external capacitor is connected to this pin to set the maximum head retract time, t
= 514 k
x C
. At the end of the delay, the spindle motor is set to brake. A head retract may also be
forced, by asserting this pin low.
5, 6
OUT-
9, 10
I
RET
1
C
DLY
21
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SI9993CS | 12-V VCM/Spindle Motor Driver for Large Capacity HDD |
| Si9993CS | 12-V VCM/Spindle Motor Driver for Large Capacity HDD(用于大容量硬盤驅(qū)動的12V 語音線圈/心軸電機驅(qū)動器) |
| SID1003 | 5phi Round Infrared LED |
| SID1003BQ | 5phi Round Infrared LED |
| SID1G307C | 5phi Round Infrared LED |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9993CS | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:12-V VCM/Spindle Motor Driver for Large Capacity HDD |
| SI-A1125 | 制造商:DIOTEC 制造商全稱:Diotec Semiconductor 功能描述:High Voltage Si-Rectifier Modules Si-Hochspannungs-Gleichrichter Module |
| SI-A1125/500-6 | 制造商:DIOTEC 制造商全稱:Diotec Semiconductor 功能描述:High Voltage Si-Rectifier Modules Si-Hochspannungs-Gleichrichter Module |
| SI-A1125_09 | 制造商:DIOTEC 制造商全稱:Diotec Semiconductor 功能描述:High Voltage Silicon Rectifier Diodes |
| SI-A1125_13 | 制造商:DIOTEC 制造商全稱:Diotec Semiconductor 功能描述:High Voltage Silicon Rectifier Diodes |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。