The SA57 is a new intelligent power switch from STMicroelectronics, designed for motor driver applications. It uses an innovative low-loss technique and advanced semiconductor devices, which makes it cost-effective, reliable and suitable for a wide range of applications.
The SA57 is a fully integrated switching amplifier designed primarily to drive DC brush motors and other high‑current loads. It offers a wide supply voltage range, high peak and continuous output currents, and built‑in protection features such as over‑current, over‑temperature, and cycle‑by‑cycle current limiting.
Key specifications include an 8.5 V to 60 V supply range, over 15 A peak output per phase, 5 A continuous output (8 A for the A‑Grade version), and a thermal warning at 135 °C. The device is packaged in a 64‑pin QFP and includes detailed pin‑out information, timing diagrams, and guidelines for power dissipation and heat‑sink design.
| Supply Voltage Range | 8.5 V to 60 V |
|---|---|
| Peak Output Current per Phase | Over 15 A |
| Continuous Output Current per Phase | 5 A (8 A for A‑Grade) |
| Maximum Junction Temperature | 150 °C |
| Thermal Warning Temperature | 135 °C |
| Current‑Limit Threshold (Vth) | 3.95 V |
The SA57 operates from 8.5 V up to 60 V.
The device can deliver over 15 A peak current per phase.
The thermal warning signal goes high at approximately 135 °C.
The SA57 is offered in a 64‑pin QFP package.