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A3972SB-T PDF预览

A3972SB-T

更新时间: 2024-02-08 14:39:57
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
11页 282K
描述
Dual DMOS Full-Bridge Microstepping PWM Motor Driver

A3972SB-T 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:DIP
包装说明:DIP, DIP24,.3针数:24
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.81
其他特性:ALSO REQUIRES 15V TO 50V VBB SUPPLY模拟集成电路 - 其他类型:BRUSH DC MOTOR CONTROLLER
JESD-30 代码:R-PDIP-T24JESD-609代码:e3
长度:30.099 mm功能数量:2
端子数量:24最高工作温度:85 °C
最低工作温度:-20 °C最大输出电流:1.5 A
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装等效代码:DIP24,.3封装形状:RECTANGULAR
封装形式:IN-LINE峰值回流温度(摄氏度):NOT SPECIFIED
电源:5 V认证状态:Not Qualified
座面最大高度:5.33 mm子类别:Motion Control Electronics
最大供电电流 (Isup):12 mA最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):4.5 V标称供电电压 (Vsup):5 V
表面贴装:NO技术:MOS
温度等级:OTHER端子面层:Matte Tin (Sn)
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.62 mmBase Number Matches:1

A3972SB-T 数据手册

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A3972  
Dual DMOS Full-Bridge Microstepping PWM Motor Driver  
Features and Benefits  
Description  
±1.5 A, 50 V Continuous Output Rating  
Low RDS(on) DMOS Output Drivers  
Optimized Microstepping via 6-Bit Linear DACs  
Programmable Mixed, Fast, and Slow Current-Decay  
Modes  
Designed for pulse-width modulated (PWM) current control  
of bipolar microstepping stepper motors, theA3972 is capable  
of continuous output currents to ±1.5Aand operating voltages  
to 50 V. Internal fixed off-time PWM current-control timing  
circuitry can be programmed via a serial interface to operate  
in slow, fast, and mixed current-decay modes.  
4 MHz Internal Oscillator for Digital Timing  
Serial-Interface Controls Chip Functions  
Synchronous Rectification for Low Power Dissipation  
Internal UVLO and Thermal Shutdown Circuitry  
Crossover-Current Protection  
Precision 2 V Reference  
Inputs Compatible with 3.3 or 5 V Control Signals  
Sleep and Idle Modes  
The desired load-current level is set via the serial port with  
two 6-bit linear DACs in conjunction with a reference voltage.  
The six bits of control allow maximum flexibility in torque  
control for a variety of step methods, from microstepping to  
full-step drive. Load current is set in 1.56% increments of the  
maximum value.  
Synchronous rectification circuitry allows the load current  
to flow through the low RDS(on) of the DMOS output driver  
during the current decay. This feature will eliminate the  
need for external clamp diodes in most applications, saving  
cost and external component count, while minimizing power  
dissipation.  
Package: 24-pin DIP with 4 fused leads  
(suffix B)  
Internal circuit protection includes thermal shutdown with  
hysteresis,transient-suppressiondiodes,andcrossover-current  
protection. Special power-up sequencing is not required.  
The A3972SB is supplied in a 24-pin plastic DIP with two  
batwing power tabs (suffix ‘B’). The power tabs are at ground  
potential and need no electrical isolation. The device is lead  
(Pb) free with 100% matte tin leadframe plating.  
Not to scale  
Pin-out Diagram  
29319.33, Rev. D  

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