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A8958CLB PDF预览

A8958CLB

更新时间: 2024-01-11 19:47:57
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 115K
描述
VOICE COIL MOTOR DRIVER

A8958CLB 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QLCC包装说明:QCCJ, LDCC28,.5SQ
针数:28Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.92模拟集成电路 - 其他类型:VOICE COIL MOTOR CONTROLLER
JESD-30 代码:S-PQCC-J28JESD-609代码:e0
长度:11.43 mm功能数量:1
端子数量:28最高工作温度:85 °C
最低工作温度:-20 °C最大输出电流:1 A
封装主体材料:PLASTIC/EPOXY封装代码:QCCJ
封装等效代码:LDCC28,.5SQ封装形状:SQUARE
封装形式:CHIP CARRIER峰值回流温度(摄氏度):NOT SPECIFIED
电源:12 V认证状态:Not Qualified
座面最大高度:4.44 mm子类别:Motion Control Electronics
最大供电电压 (Vsup):16 V最小供电电压 (Vsup):3 V
标称供电电压 (Vsup):12 V表面贴装:YES
技术:BIPOLAR温度等级:OTHER
端子面层:Tin/Lead (Sn/Pb)端子形式:J BEND
端子节距:1.27 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:11.43 mm
Base Number Matches:1

A8958CLB 数据手册

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8958  
VOICE COIL MOTOR DRIVER  
Providing control and drive of the voice coil motor used for head  
positioning in disk drive applications, the A8958CLB 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  
current control function is supplemented by additional circuitry to  
protect the heads and the data disk during system failure or normal  
system shutdown.  
LOGIC  
SUPPLY  
1
2
3
4
V
24  
23  
22  
21  
20  
SENSE  
OUT  
CC  
PARK  
DRIVE  
INHIBIT  
1.5 V  
+
PARK  
UV  
1
-
UV  
GROUND  
PWR OK  
GROUND  
2
5
6
LIMIT  
The two ±800 mA driver outputs provide very-low saturation voltage  
drops and precise current control utilizing a single current-sensing  
resistor connected in series with the load. Under-voltage lockout  
disables the system in a controlled sequence if a fault condition occurs.  
19  
18  
GROUND  
AB  
AB  
AB  
GROUND  
SENSE  
GROUND  
7
8
AB  
PARK  
VOLTAGE  
17  
16  
15  
IN+  
When activated by the under-voltage comparator, or a park com-  
mand, the output power drivers change from a controlled current to a  
user-determined constant park voltage. Other features include a power  
ok flag, a limit input to force the outputs to their maximum level in either  
polarity, an over-riding output disable to shut down both power amplifi-  
ers and reduce quiescent supply current, and internal thermal shutdown  
which disables the load (but still allowing the head to be parked) in the  
event of excessive junction temperatures. The load is re-enabled when  
the junction temperature returns to a safe level.  
9
SENSE  
IN–  
IN  
IN  
B+  
B–  
+
-
B
IN  
A+  
10  
+
A
-
LOAD  
SUPPLY  
14  
13  
V
11  
12  
IN  
A–  
BB  
OUT  
B
OUT  
A
Dwg. PP-054  
ABSOLUTE MAXIMUM RATINGS  
The A8958CLB is supplied in a 24-lead power SOIC for surface-  
mount applications. The copper batwing construction provides for  
maximum package power dissipation in a minimum package size. It is  
rated for continuous operation over the temperature range of 0°C to  
+70°C.  
at TA = 25°C  
Supply Voltages, VBB and VCC ............... 16 V  
Output Current, IOUT ............................±1.0 A  
Park Drive Output Current, IPARK  
Continuous................................ 250 mA  
Peak.............................................. 1.0 A  
Amplifier Input Voltage Range,  
FEATURES  
VIN ..................................... -2.0 V to VCC  
Sense Input Voltage Range,  
Controlled-Velocity Head Parking  
VSENSE IN ............................ -0.3 V to VCC  
Comparator and Digital Inputs,  
Zero Deadband  
High Transconductance Bandwidth  
User-Adjustable Transconductance Gain  
±800 mA Load Current  
VIN ....................................-0.3 V to 10 V  
IIN .............................................. ±10 mA  
Power OK Output, VCEX ......................... 20 V  
IC ................................................. 30 mA  
Output Clamp Diode Current,  
IF (pulsed) ..................................... 1.0 A  
Package Power Dissipation, PD .. See Graph  
Operating Temperature Range,  
TA ......................................0°C to +70°C  
Junction Temperature, TJ ...................150°C*  
Storage Temperature Range,  
Dual Under-Voltage Monitors  
with Flag and User-Selectable Trip Points  
Internal Thermal Shutdown Circuitry  
Replaces UC3175  
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.  
Always order by complete part number, e.g., A8958CLB .  

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