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UC2842A /3A /4A /5A系列控制IC是针脚兼容改进型UC2842 /3/4/5系列的引脚。该系列提供控制电流模式开关模式电源的必要功能,具有以下改进功能。启动电流保证小于0.5 mA。振荡器放电调整为8.3 mA。在欠压锁定期间,对于V CC 超过5 V,输出级可以在小于1.2 V时下沉至少10 mA。
此系列的成员之间的差异显示在下表。
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 |
UC2842AQ | UC2843A-Q1 | UC2843AQ | UC2845AQ |
---|---|---|---|
Boost | Boost Buck-Boost Flyback Forward | Boost Flyback Forward | Boost Flyback Forward |
Current | Current | Current | Current |
16 | 8.5 | 8.5 | 8.5 |
30 | 30 | 30 | 30 |
500 | 500 | 500 | 500 |
16/10 | 8.5/7.9 | 8.5/7.9 | 8.5/7.9 |
100 | 100 | 100 | 50 |
1 | 1 | 1 | 1 |
Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology |
Automotive | Automotive | Automotive | Automotive |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
14SOIC 8SOIC | 8SOIC | 14SOIC 8SOIC | 14SOIC 8SOIC |