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LM25037 PWM控制器包含实现平衡双端功率转换器拓扑所需的所有功能,例如推挽式,半桥式和全桥式。与常见的单端拓扑结构(如反激式和前向式)相比,这些双端拓扑结构可实现更高的效率和更高的功率密度。 LM25037可配置为电压模式或电流模式控制,并且外部元件最少。提供两个交替的栅极驱动输出,每个输出都具有1.2A的峰值输出电流。 LM25037可配置为在5.5 V至75 V的超宽范围内直接通过输入电压轨工作。其他功能包括可编程最大占空比限制,线路欠压锁定,逐周期电流限制和打嗝模式具有可调超时延迟,软启动和具有同步功能,精密基准和热关断功能的2 MHz振荡器的故障保护。
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 |
LM25037-Q1 | UC2856-Q1 | UCC2808A-1Q1 | UCC2808A-2Q1 | UCC28220-Q1 |
---|---|---|---|---|
Full-Bridge Half-Bridge Push-Pull | Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull | Push-Pull | Push-Pull | Flyback Forward |
Current Feedforward Voltage | Current | Current | Current | Current |
5.5 | 8 | 8.3 | 4.1 | 10.5 |
75 | 40 | 15 | 15 | 14 |
2000 | 1000 | 1000 | 1000 | 2000 |
Programmable/1.25V | 7.7/7 | 12.5/8.3 | 4.3/4.1 | 10.5/8.4 |
96 | 50 | 50 | 50 | 90 |
1.2 | 1.5 | 1 | 1 | 0.01 |
Adjustable Switching Frequency Current Limiting HV Start-up Multi-topology Programmable Max Duty Cycle Programmable Soft Start Synchronization Pin | Error Amplifier Multi-topology Soft Start Synchronization Pin | Soft Start | Soft Start | Adjustable Switching Frequency Current Limiting Input Line Monitor Multi-topology Programmable Max Duty Cycle Programmable Slope Compensation Soft Start |
Automotive | Automotive | Automotive | Automotive | Automotive |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
16TSSOP | 16SOIC | 8SOIC | 8SOIC | 16SOIC 16TSSOP |