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A3973SB PDF预览

A3973SB

更新时间: 2024-01-31 03:09:08
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
12页 201K
描述
DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER

A3973SB 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:SOP,
针数:24Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.86模拟集成电路 - 其他类型:STEPPER MOTOR CONTROLLER
JESD-30 代码:R-PDSO-G24JESD-609代码:e0
长度:15.4 mm功能数量:1
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 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):245认证状态:Not Qualified
座面最大高度:2.65 mm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:YES温度等级:OTHER
端子面层:TIN LEAD端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:7.5 mm
Base Number Matches:1

A3973SB 数据手册

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3973  
DUAL DMOS FULL-BRIDGE MICRO-  
STEPPING PWM MOTOR DRIVER  
PRELIMINARY INFORMATION  
(Subject to change without notice)  
December 1, 2000  
Designed for pulse-width modulated (PWM) current control of  
bipolar microstepping stepper motors, the A3973SB and A3973SLB are  
capable of continuous output currents to 1 A and operating voltages to  
35 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. The A3973SB (DIP) and the A3973SLB (SOIC)  
are electrically identical and differ only in package style.  
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.  
Internal circuit protection includes thermal shutdown with hyster-  
esis, transient-suppression diodes, and crossover-current protection.  
Special power-up sequencing is not required.  
VCP  
CP1  
CP2  
OSC  
23 SLEEP  
24  
1
2
3
4
VREG  
22  
OUT1B  
LOAD  
21 OUT2B  
LOAD  
SUPPLY  
20  
5
6
7
8
SUPPLY  
1
V
BB1  
V
BB2  
2
19  
18  
GROUND  
GROUND  
GROUND  
GROUND  
SENSE  
1
SENSE  
2
17  
16  
9
OUT2A  
LOGIC  
OUT1A  
STROBE  
VDD  
15  
14  
13  
10  
11  
SUPPLY  
MUX  
CLOCK  
REF  
DATA 12  
Dwg. PP-069-3  
ABSOLUTE MAXIMUM RATINGS  
The A3973SB is supplied in a 24-lead plastic DIP with a copper  
batwing power tab; the A3973SLB is supplied in a 24-lead plastic SOIC  
with a copper batwing power tab for surface-mount applications. The  
power tabs are at ground potential and need no electrical isolation.  
at TA = +25°C  
Load Supply Voltage, VBB ................ 35 V  
Output Current, IOUT ...................... 1.0 A  
Logic Supply Voltage, VDD .............. 7.0 V  
Logic Input Voltage Range,  
FEATURES  
VIN ................ -0.3 V to VDD + 0.3 V  
I
1 A, 35 V Continuous Output Rating  
Reference Voltage, VREF ..................... 3 V  
Sense Voltage (dc), VS ................ 500 mV  
Package Power Dissipation, PD  
A3973SB ............................... 3.1 W  
A3973SLB ............................ 2.2 W  
Operating Temperature Range,  
TA .......................... -20°C to +85°C  
Junction Temperature, TJ ............. +150°C  
Storage Temperature Range,  
I Low rDS(on) DMOS Output Drivers  
I Optimized Microstepping via 6-Bit Linear DACs  
I Programmable Mixed, Fast, and Slow Current-Decay Modes  
I 4 MHz Internal Oscillator for Digital Timing  
I Serial-Interface Controls Chip Functions  
I Synchronous Rectification for Low Power Dissipation  
I Internal UVLO and Thermal Shutdown Circuitry  
I Crossover-Current Protection  
TS ......................... -55°C to +150°C  
Output current rating may be limited by duty  
cycle, ambient temperature, and heat sinking.  
Under any set of conditions, do not exceed the  
specified current rating or a junction tempera-  
ture of 150°C.  
I Precision 2 V Reference  
I Inputs Compatible with 3.3 V or 5 V Control Signals  
I Sleep and Idle Modes  
Always order by complete part number, e.g., A3973SB .  

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