UC3770B是TI公司的一款运动/电机控制产品，UC3770B是高性能步进电机驱动电路，本页介绍了UC3770B的产品说明、应用、特性等，并给出了与UC3770B相关的TI元器件型号供参考。
UC3770B - 高性能步进电机驱动电路 - 运动/电机控制 - 电源管理特殊功能 - TI公司（Texas Instruments，德州仪器）
The UC3770A and UC3770B are high-performance full bridge drivers that offer higher current and lower saturation voltage than the UC3717 and the UC3770. Included in these devices are LS-TTL compatible logic inputs, current sense, monostable, thermal shutdown, and a power H-bridge output stage. Two UC3770As or UC3770Bs and a few external components form a complete micro-processor-controllable stepper motor power system.
Unlike the UC3717, the UC3770A and the UC3770B require external high-side clamp diodes. The UC3770A and UC3770B are identical in all regards except for the current sense thresholds. Thresholds for the UC3770A are identical to those of the older UC3717 permitting drop-in replacement in applications where high-side diodes are not required. Thresholds for the UC3770B are tailored for half stepping applications where 50%, 71%, and 100% current levels are desirable.
The UC3770A and UC3770B are specified for operation from 0°C to 70°C ambient.
- Full-Step, Half-Step and Micro-Step Capability
- Bipolar Output Current up to 2A
- Wide Range of Motor Supply Voltage: 10\x9650V
- Low Saturation Voltage
- Wide Range of Current Control: 5mA\x962A
- Current Levels Selected in Steps or Varied Continuously
- Thermal Protection and Soft Intervention
