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参数资料
| 型号： | 8936 |
| 厂商： | Allegro MicroSystems, Inc. |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | VOICE COIL MOTOR DRIVER |
| 中文描述： | 音圈电机驱动 |
| 文件页数： | 1/10页 |
| 文件大小： | 102K |
| 代理商： | 8936 |
8936
VOICE COIL MOTOR DRIVER
March 16, 1993
DSCONINUEDPRODUC
Fault conditions that produce excessive
junction temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated, but should be avoided.
Always order by complete part number:
—FORREERENCEONY
Output current rating may be restricted to a value
determined by system concerns and factors.
These include: system duty cycle and timing,
ambient temperature, and use of any heatsinking
and/or forced cooling. For reliable operation the
specified maximum junction temperature should
not be exceeded.
A8936CLW
TM
McroSystems, Inc.
A
8936
VOICE COIL MOTOR DRIVER
Providing control and drive of the voice coil motor used for head
positioning in 5 V disk drive applications, the A8936C— is a full-bridge
driver which can be configured so that its output current is a direct
function of an externally applied control voltage or current. This linear
protect the heads and the data disk during system failure or normal
system shutdown. An under- or over-velocity sense disables the
system in a controlled sequence if a fault condition occurs.
The two
±
500 mA MOS driver outputs provide very low saturation
voltage and minimal power dissipation. Additional headroom is
achieved by the sense-FET structure eliminating the need for an
external current-sense resistor. Thermal protection and under-voltage
lockout disables the system in a controlled sequence if a fault condi-
tion occurs.
FEATURES
Over-Velocity Fault Function
Lossless Current Sensing
Zero Deadband
High Transconductance Bandwidth
User-Adjustable Transconductance Gain
Digital Transconductance Gain Switch (4:1 Ratio)
5 Volt Monitor with Selectable UV Trip Point
Retract Circuitry Functional to 0 Volts
Chip Enable/Sleep Mode Function
1 V at 500 mA Output Saturation Voltage
Internal Thermal Shutdown Circuitry
D
2
A8936CLW
ABSOLUTE MAXIMUM RATINGS
Supply Voltages, V
CC
and V
DD
...........
6.0 V
Output Current, I
OUT
(peak) ..........
±
600 mA
(continuous) ...........................
±
500 mA
Analog Input Voltage Range,
V
...................................
-0.3 V to V
CC
Logic Input Voltage Range,
V
...............................
-0.3 V to +6.0 V
Package Power Dissipation,
........................................
See Graph
Operating Temperature Range,
T
A
.....................................
0
°
C to +70
°
Junction Temperature, T
J
..............
+150
°
Storage Temperature Range,
T
................................-
55
°
C to +150
°
Q
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
RET SET
LOAD
SUPPLY
ACT
REFERENCE
H GAIN
PWR OFF
RET REF
GROUND
EN VEL FLT
OUT
SIGNAL
SUPPLY
VEL
OUT P
UV
SET
V
BEMF
V
FLT
CC
V
V
SENS
VEL FLT
V
SENS FB
SGND
OUT
OUT
V
DD
SGND
ACT
FB
Dwg. PP-046A
RETRACT
FAULT
MP
RESET
WINDOW
COMP.
+
–
+
–
PROTECT
CIRCUIT
PROTECT
CIRCUIT
V
REF
V
REF
Part Number
Package
A8936CJT
64-Lead Thin Quad Flatpack
28-Lead SOIC
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相关代理商/技术参数 |
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|---|---|
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| 89361 | 制造商:FCI-CONNECTOR 制造商全称:FCI connector 功能描述:2.00mm IDC 0.2,UM Au |
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| 89361-050 | 制造商:FCI 功能描述: |
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