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A8932CJTA PDF预览

A8932CJTA

更新时间: 2024-02-14 02:38:29
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器运动控制电子器件信号电路光电二极管电动机控制电机
页数 文件大小 规格书
8页 165K
描述
Voice Coil Motor Controller, 0.6A, PQFP64, PLASTIC, TQFP-64

A8932CJTA 技术参数

生命周期:Obsolete包装说明:,
Reach Compliance Code:unknown风险等级:5.84
Is Samacsys:NBase Number Matches:1

A8932CJTA 数据手册

 浏览型号A8932CJTA的Datasheet PDF文件第2页浏览型号A8932CJTA的Datasheet PDF文件第3页浏览型号A8932CJTA的Datasheet PDF文件第4页浏览型号A8932CJTA的Datasheet PDF文件第5页浏览型号A8932CJTA的Datasheet PDF文件第6页浏览型号A8932CJTA的Datasheet PDF文件第7页 
8932-A  
VOICE-COIL MOTOR DRIVER  
Providing control and drive of the voice-coil motor used for head  
positioning in 5 V disk drive applications, the second-generation  
A8932CLWA is a full-bridge driver that can be configured so that its  
output current is a direct function of an externally applied control  
voltage or current. This linear current control function is supplemented  
by additional circuitry to protect the heads and the data disk during  
system failure or normal system shutdown.  
1
RET REF  
28  
RET SET  
V
2
3
27  
26  
V
FLT  
SENS  
PROTECT  
CIRCUIT  
V
V
LOAD  
BEMF  
+
V
4
25  
24  
GROUND  
SENS FB  
5
6
UV  
SGND  
N
SET  
23  
22  
21  
OUT  
P
R
OUT P  
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 exter-  
nal current-sense resistor. Internal circuitry can be configured to  
provide closed-loop velocity control of the actuator by utilizing the  
generated back-EMF of the voice-coil motor. Thermal protection and  
under-voltage lockout disables the system in a controlled sequence if a  
fault condition occurs.  
LOAD  
SUPPLY  
7
8
V
OUT  
DD  
SWITCH  
OUT  
N
+
V
SGND  
ACT  
9
10  
11  
20  
P
IN  
N
+
REF  
OUT  
SW  
19  
18  
2 V  
FB  
PWR OFF  
H GAIN  
RETRACT  
FAULT  
12  
13  
17  
16  
PROTECT  
CIRCUIT  
MP  
REFERENCE  
ACT  
RESET  
+
SIGNAL  
SUPPLY  
14  
15  
V
CC  
FEATURES  
Dwg. PP-042B  
I Class-B, 2 rDS(on) at 500 mA Output  
I Lossless Current Sensing  
ABSOLUTE MAXIMUM RATINGS  
Supply Voltages, VCC and VDD ............ 6.0 V  
Output Current, IOUT (peak) ........... 600 mA  
(continuous) ........................... 500 mA  
Analog Input Voltage Range,  
VIN .................................... -0.3 V to VCC  
Logic Input Voltage Range,  
I Zero Current-Loop Deadband  
I High Transconductance Bandwidth  
I User-Adjustable Transconductance Gain  
I Digital Transconductance Gain Switch (4:1 Ratio)  
I 5 Volt Monitor with Selectable UV Trip Point  
I Retract Circuitry Functional to 0 Volts  
I Sleep Mode Function  
VIN ............................... -0.3 V to +6.0 V  
Package Power Dissipation,  
PD ......................................... See Graph  
I Internal Back-EMF Velocity Loop Option  
I Internal Thermal Shutdown Circuitry  
Operating Temperature Range,  
TA ..................................... 0°C to +70°C  
Junction Temperature, TJ ............... +150°C†  
Storage Temperature Range,  
TS ................................ -55°C to +150°C  
† Fault conditions that produce excessive junction  
temperature will activate device thermal shutdown  
circuitry. These conditions can be tolerated, but  
should be avoided.  
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.  
Always order by complete part number, e.g., A8932CLWA .  

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