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LM5025 PWM控制器包含使用有源钳位和复位技术实现电源转换器所需的所有功能。该器件可配置为控制P沟道钳位开关或N沟道钳位开关。采用有源钳位技术,与传统的钳位绕组或RDC钳位和复位技术相比,可以实现更高的效率和更高的功率密度。
提供两个控制输出,主电源开关控制(OUT_A)和有源钳位开关控制(OUT_B)。有源钳位输出可配置为指定的重叠时间(对于P通道开关应用)或指定的死区时间(对于N_channel应用)。两个内部复合栅极驱动器与MOS和双极器件并联,提供卓越的栅极驱动特性。该控制器专为高速运行而设计,包括振荡器频率范围高达1 MHz,总PWM和电流检测传播延迟小于100 ns。
LM5025包括一个高压启动稳压器,工作在13 V至90 V的宽输入范围。其他功能包括:线路欠压锁定(UVLO),软启动,振荡器UP和DOWN同步功能,精密基准和热关断。
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 |
LM5025 | LM5025A | LM5025B | LM5025C |
---|---|---|---|
Active-Clamp Forward Forward | Active-Clamp Forward Forward | Active-Clamp Forward Forward | Active-Clamp Forward Forward |
Feedforward Voltage | Feedforward Voltage | Feedforward Voltage | Feedforward Voltage |
13 | 13 | 13 | 13 |
90 | 90 | 100 | 90 |
1000 | 1000 | 1000 | 1000 |
Programmable/2.5V | Programmable/2.5V | Programmable/2.5V | Programmable/2.5V |
80 | 80 | 73 | 91 |
3 | 3 | 3 | 3 |
Current Limiting HV Start-up Leading Edge Blanking Soft Start Thermal Shutdown | Current Limiting HV Start-up Leading Edge Blanking Soft Start Thermal Shutdown | Current Limiting HV Start-up Leading Edge Blanking Soft Start Thermal Shutdown | Current Limiting HV Start-up Leading Edge Blanking Soft Start Thermal Shutdown |
Catalog | Catalog | Catalog | Catalog |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
16TSSOP 16WSON | 16TSSOP 16WSON | 16TSSOP 16WSON | 16TSSOP |