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UC2843A控制IC是UC2843的引腳兼容改進版本。提供控制電流模式開關模式電源的必要功能,該器件具有以下改進的功能。啟動電流指定為小于0.5 mA。振蕩器放電調整為8.3 mA。在欠壓鎖定期間,對于V CC 超過5 V,輸出級可在低于1.2 V時吸收至少10 mA。
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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 |
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UC2843A-Q1 | UC2842AQ | UC2843AQ | UC2845AQ |
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Boost Buck-Boost Flyback Forward ? ? | Boost ? ? | Boost Flyback Forward ? ? | Boost Flyback Forward ? ? |
Current ? ? | Current ? ? | Current ? ? | Current ? ? |
8.5 ? ? | 16 ? ? | 8.5 ? ? | 8.5 ? ? |
30 ? ? | 30 ? ? | 30 ? ? | 30 ? ? |
500 ? ? | 500 ? ? | 500 ? ? | 500 ? ? |
8.5/7.9 ? ? | 16/10 ? ? | 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 ? ? |
8SOIC ? ? | 14SOIC 8SOIC ? ? | 14SOIC 8SOIC ? ? | 14SOIC 8SOIC ? ? |