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UC1846 /7系列控制设备提供了实现固定频率,电流模式控制方案所需的所有功能,同时保持最少的外部元件数量。该技术的卓越性能可以通过改进的线性调节,增强的负载响应特性以及更简单,更易于设计的控制回路来测量。拓扑优势包括固有的逐脉冲电流限制能力,推挽式转换器的自动对称校正,以及在保持相等电流共享的同时进行并联的能力。 \
除了软启动功能外,保护电路还包括内置欠压锁定和可编程电流限制。还可以使用关闭功能,可以通过自动重启启动完全关闭或关闭电源。
其他功能包括完全锁存操作,双脉冲抑制,截止期限调整功能和± 1%修整带隙参考。
UC1846在OFF状态下具有低输出,而UCx847在OFF状态下具有高输出。
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 |
UC2846 | UC2847 | UC2856 | UCC2806 |
---|---|---|---|
Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull | Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull | Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull | Push-Pull |
Current | Current | Current | Current |
6.95 | 7.7 | 7.7 | 7.5 |
40 | 40 | 40 | 15 |
500 | 500 | 1000 | 1000 |
7.7/6.95 | 7.7/6.95 | 7.7/7 | 7.5/6.75 |
50 | 50 | 50 | 49 |
0.5 | 0.5 | 1.5 | 0.5 |
Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology Soft Start Synchronization Pin | 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 Current Limiting Dead Time Control Error Amplifier Multi-topology Soft Start Synchronization Pin |
Catalog | Catalog | Catalog | Catalog |
-40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
16PDIP 16SOIC | 16SOIC | 16PDIP 16SOIC | 16PDIP 16SOIC 16SOIC 16SSOP 16TSSOP |
无样片 |