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UCC2897A PWM控制器简化了各种有源钳位或同步整流器开关电源拓扑的实现。
UCC2897A是峰值电流 - 模式固定频率高性能脉冲宽度调制器。控制器包括P通道辅助开关的逻辑和驱动能力,以及对正确有源钳位操作的关键延迟进行编程的简单方法。
功能包括内部可编程斜率补偿电路,精确D MAX 限制,以及带有内部定时电容的可同步振荡器。精确的线路监控功能还可以根据体输入电压VIN对转换器的ON和OFF转换进行编程。
UCC2897A增加了二级打嗝模式电流检测阈值,双向同步和输入过压保护功能。 UCC2897A采用20引脚TSSOP(PW)和20引脚QFN(RGP)封装。
所有商标均为其各自所有者的财产。
Topology |
Control Method |
Vin (Min) (V) |
Vin (Max) (V) |
Frequency (Max) (kHz) |
UVLO Thresholds On/Off (V) |
Duty Cycle (Max) (%) |
Gate Drive (Typ) (A) |
Features |
Rating |
Operating Temperature Range (C) |
Pin/Package |
UCC2897A | LM5026 | LM5034 |
---|---|---|
Active-Clamp Forward Forward | Active-Clamp Forward Forward | Active-Clamp Forward Flyback Forward |
Current | Current | Current |
18 | 13 | 13 |
110 | 100 | 100 |
1000 | 1000 | 2000 |
12.7/~8 | Programmable/1.25V | Programmable/1.25V |
74 | 80 | 76 |
2 | 3 | 2.5 |
HV Start-up Input Line Monitor Programmable Slope Compensation Soft Start Soft Switching | Current Limiting Dead Time Control HV Start-up Leading Edge Blanking Programmable Max Duty Cycle Programmable Soft Start Synchronization Pin | Current Limiting HV Start-up Soft Start Synchronization Pin |
Catalog | Catalog | Catalog |
-40 to 125 | -40 to 125 | -40 to 125 |
20QFN 20TSSOP | 16TSSOP 16WSON | 20TSSOP |