A3957SA中文资料PDF规格书
A3957SA规格书详情
The A3957SA and A3957SLB are designed for driving one winding of a bipolar stepper motor in a microstepping mode. The outputs are rated for continuous output currents to ±1.5 A and operating voltages to 50 V. Internal pulse-width modulated (PWM) current control combined with an internal four-bit nonlinear digital-to-analog converter allows the motor current to be controlled in full-, half-, quarter-, eighth-, or sixteenth-step (microstepping) modes. Nonlinear increments minimize the number of control lines necessary for microstepping. Microstepping provides for increased step resolution, and reduces torque variations and resonance problems at low speed.
Internal circuitry determines whether the PWM current-control circuitry operates in a slow (recirculating) current-decay mode, fast (regenerative) current-decay mode, or in a mixed current-decay mode in which the off time is divided into a period of fast current decay with the remainder of the fixed off time spent in slow current decay. The combination of user-selectable current-sensing resistor and reference voltage, digitally selected output current ratio; and slow, fast, or mixed current-decay modes provides users with a broad, variable range of motor control.
Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover current protection. Special power-up sequencing is not required.
The A3957S— is supplied in a choice of two power packages; a 16-pin dual-in-line plastic package (suffix ‘A’), and a 24-lead plastic SOIC with copper heat-sink tabs (suffix ‘LB’). The power tab is at ground potential and needs no electrical isolation.
FEATURES
■ ±1.5 A Continuous Output Current
■ 50 V Output Voltage Rating
■ Internal PWM Current Control
■ 4-Bit Non-Linear DAC for 16-Bit Microstepping
■ Satlington™ Sink Drivers
■ Fast, Mixed Fast/Slow, and Slow Current-Decay Modes
■ Internal Transient-Suppression Diodes
■ Internal Thermal-Shutdown Circuitry
■ Crossover-Current and UVLO Protection
产品属性
- 型号:
A3957SA
- 制造商:
ALLEGRO
- 制造商全称:
Allegro MicroSystems
- 功能描述:
FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ALLEGRO |
2016+ |
SOP24 |
9000 |
只做原装,假一罚十,公司可开17%增值税发票! |
询价 | ||
ALLEGRO |
2020+ |
SOP8 |
80000 |
只做自己库存,全新原装进口正品假一赔百,可开13%增 |
询价 | ||
A |
23+ |
SOP |
20000 |
原厂原装正品现货 |
询价 | ||
ALLEGRO |
DIP-16 |
25 |
询价 | ||||
ALLEGRO |
2022 |
SOP |
1540 |
原厂原装正品,价格超越代理 |
询价 | ||
ALLEGRO |
2020+ |
SOP-24 |
16800 |
绝对原装进口现货,假一赔十,价格优势!? |
询价 | ||
ALLEGRO/雅丽高 |
23+ |
TO-59 |
8510 |
原装正品代理渠道价格优势 |
询价 | ||
ALLEGRO |
23+ |
SOP |
9800 |
现货库存,全新原装,特价销售 |
询价 | ||
ALLEGRO |
23+ |
SOP24 |
8000 |
原装正品,假一罚十 |
询价 | ||
ALLEGRO |
23+ |
SOP24 |
2000 |
全新进口原装现货热卖! |
询价 |