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UCC28742离线反激式控制器是一款高度集成的6引脚次级侧稳压PWM控制器，适用于高效交流/直流电源。这是一种隔离式反激电源控制器，使用一个光耦合器来提供恒定电压（CV），从而改善对大型负载阶跃的瞬态响应。此器件处理来自光耦合反馈和辅助反激式绕组的信息，以此实现对输出电压和电流的高性能控制。
UCC28742采用先进的控制算法来实现高运行效率和性能。驱动输出接至一个MOSFET电源开关。带有谷值开关的断续传导模式（DCM）减少了开关损耗。开关频率的调制和初级电流峰值振幅（FM和AM）在整个负载和线路范围内保持较高的转换效率。
此控制器的最大运行开关频率为65kHz，并且一直保持对变压器中的峰值初级电流的控制.200Hz的最小开关频率有助于实现较低的空载输入功率。
所有商标均为其各自所有者的财产。
| Control Method |
| Duty Cycle (Max) (%) |
| Frequency (Max) (kHz) |
| UVLO Thresholds On/Off (V) |
| Features |
| Operating Temperature Range (C) |
| Package Group |
| Rating |
| Package Size: mm2:W x L (PKG) |
| UCC28742 | UCC28700 | UCC28704 | UCC28710 | UCC28720 | UCC28722 | UCC28740 |
|---|---|---|---|---|---|---|
| Current | Current | Current | Current | Current | Current | Current |
| 99 | 99 | 99 | 99 | 99 | 99 | 99 |
| 105 | 132 | 85 | 100 | 80 | 80 | 100 |
| 22/7.7 | 21/8.1 | 21/7.7 | 21/8 | 21/7.7 | 21/7.7 | 21/7.75 |
| SSR DCM Smart Meters Compatible IoT Compatible Power Delivery Compatible | PSR Adjustable CBC CV/CC Control DCM Power Delivery Compatible | PSR HV Start-up Configurable Fixed CBC NTC Configurable CV/CC Control DCM USB Type-C Compatible IoT Compatible Power Delivery Compatible | PSR HV Start-up Adjustable CBC CV/CC Control DCM Green Mode Input Line Monitor Leading Edge Blanking Light Load Efficiency Low Power Soft Start Smart Meters Compatible IoT Compatible Power Delivery Compatible | PSR HV Start-up BJT Switch Adjustable CBC CV/CC Control DCM Current Limiting Green Mode HV Start-up Input Line Monitor Leading Edge Blanking Light Load Efficiency Low Power Soft Start Smart Meters Compatible IoT Compatible Power Delivery Compatible | PSR BJT Switch Adjustable CBC CV/CC Control DCM Smart Meters Compatible IoT Compatible Power Delivery Compatible | SSR HV Start-up CV/CC Control DCM Smart Meters Compatible IoT Compatible USB Type-C Compatible Power Delivery Compatible |
| -40 to 125 | -20 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
| SOT-23 | SOT-23 | SOT-23 | SOIC | SOIC | SOT-23 | SOIC |
| Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 7SOIC: 29 mm2: 6 x 4.9(SOIC) | 7SOIC: 29 mm2: 6 x 4.9(SOIC) | 6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 7SOIC: 29 mm2: 6 x 4.9(SOIC) |
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