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UC1525A /1527A系列脈沖寬度調制器集成電路設計用于設計所有類型的開關電源時提高性能并減少外部元件數量。片內5.1V基準電壓調整為1%,誤差放大器的輸入共模范圍包括基準電壓,省去了外部電阻。振蕩器的同步輸出允許多個單元從屬或單個單元與外部系統時鐘同步。 C T 和放電終端之間的單個電阻提供大范圍的死區時間調整。這些器件還具有內置insoft-start電路,僅需外部定時電容。關斷端子控制軟啟動電路和輸出級,通過脈沖關斷的PWM鎖存器提供瞬時關斷,以及使用更長的關斷命令進行軟啟動再循環。
所有商標均為其各自所有者的財產。
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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 |
? |
UC3525A | UC3524 | UC3524A | UC3525B | UC3526A |
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Boost Buck Flyback Forward Full-Bridge Half-Bridge Push-Pull ? ? | Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull ? ? | Boost Buck Flyback Forward Full-Bridge Half-Bridge Push-Pull ? ? | Boost Buck Flyback Forward Full-Bridge Half-Bridge Push-Pull ? ? | Boost Buck Flyback Forward Full-Bridge Half-Bridge Push-Pull ? ? |
Voltage ? ? | Voltage ? ? | Voltage ? ? | Voltage ? ? | Voltage ? ? |
7 ? ? | 7.5 ? ? | 7.5 ? ? | 7 ? ? | 7 ? ? |
40 ? ? | 40 ? ? | 40 ? ? | 40 ? ? | 40 ? ? |
500 ? ? | 450 ? ? | 450 ? ? | 500 ? ? | 600 ? ? |
7.0/6.5 ? ? | 7.5/7 ? ? | 7.5/7 ? ? | 7.0/6.5 ? ? | 7/6.8 ? ? |
49 ? ? | 90 ? ? | 50 ? ? | 49 ? ? | 50 ? ? |
0.4 ? ? | 0.1 ? ? | 0.2 ? ? | 0.4 ? ? | 0.2 ? ? |
Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology Soft Start Synchronization Pin ? ? | Adjustable Switching Frequency Error Amplifier Multi-topology Soft Start Synchronization Pin ? ? | Adjustable Switching Frequency Error Amplifier Multi-topology Soft Start Synchronization Pin ? ? | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology Soft Start Synchronization Pin ? ? | Adjustable Switching Frequency Dead Time Control Error Amplifier Multi-topology Soft Start Synchronization Pin ? ? |
Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? | Catalog ? ? |
0 to 70 ? ? | 0 to 70 ? ? | 0 to 70 ? ? | 0 to 70 ? ? | 0 to 70 ? ? |
16PDIP 16SOIC ? ? | 16SOIC 16SOIC ? ? | 16PDIP 16SOIC ? ? | 16PDIP 16SOIC ? ? | 18PDIP 18SOIC ? ? |