UCC28951 控制器是 UCC28950 的增强版本。它是 UCC28950 完全兼容的快插替代器件。 UCC28951 采用全桥高级控制,并对同步整流器 (SR) 输出级进行主动控制。
可编程的延迟确保了 ZVS 可在广泛的工作条件下运行,而负载电流可合理调节次级侧同步整流器 (SR) 的开关延迟。此功能最大程度地提高总体系统效率。
24 引脚 TSSOP 封装符合 RoHS 要求。
| Topology | Phase-shifted full bridge |
| Control mode | Current, Peak current mode, Voltage |
| Duty cycle (max) (%) | 97 |
| Switching frequency (max) (kHz) | 1000 |
| Features | Adjustable switching frequency, Current limiting, Enable/Shutdown, Error amplifier, Green mode, Light-load efficiency, Programmable slope compensation, Soft start, Soft switching, Synchronization pin, Thermal shutdown |
| UVLO thresholds on/off (V) | 7.3/6.7 |
| Operating temperature range (°C) | -40 to 125 |
| Rating | Catalog |
| Gate drive (typ) (A) | 0.2 |
| Vin (max) (V) | 17 |
| TSSOP (PW) | 24 | 49.92 mm² 7.8 x 6.4 |