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UCx84xA系列控制器件是引腳兼容的UCx84x系列改進(jìn)版本。該系列器件具有控制電流模式或開關(guān)模式電源的必要功能,具有許多改進(jìn)的特性:啟動電流小于0.5 mA,振蕩器放電調(diào)整為8.3 mA,在UVLO期間,輸出級可以下降對于V CC 超過5 V,小于1.2 V時至少10 mA。
所有商標(biāo)均為他們各自的所有者。
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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 |
? |
UC3844A | UC3842A | UC3843A | UC3845A |
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Boost Buck Buck-Boost Flyback Forward ? ? | Boost Buck Buck-Boost Flyback Forward ? ? | Boost Buck Flyback Forward ? ? | Boost Buck Buck-Boost Flyback Forward ? ? |
Peak Current Mode ? ? | Peak Current Mode ? ? | Current ? ? | Peak Current Mode ? ? |
16 ? ? | 16 ? ? | 7.6 ? ? | 8.4 ? ? |
30 ? ? | 30 ? ? | 30 ? ? | 30 ? ? |
500 ? ? | 500 ? ? | 500 ? ? | 500 ? ? |
16/10 ? ? | 16/10 ? ? | 8.4/7.6 ? ? | 8.4/7.6 ? ? |
50 ? ? | 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 ? ? | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology ? ? | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology ? ? |
Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? |
0 to 70 ? ? | 0 to 70 ? ? | 0 to 70 ? ? | 0 to 70 ? ? |
14SOIC 8PDIP 8SOIC ? ? | 14SOIC 16SOIC 8PDIP 8SOIC ? ? | 14SOIC 8PDIP 8SOIC ? ? | 14SOIC 8PDIP 8SOIC ? ? |