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UCC3806系列BiCMOS PWM控制器采用熟悉的架构,性能得到极大改善。 UCC3806系列采用与流行的UC3846系列相同的框图和引脚排列,具有更高的开关频率能力,同时大大降低了器件内部的偏置电流。这些器件的典型启动电流为50μA,并具有明确的开启电压阈值,因此适用于从离线电源到电池供电的便携式设备等应用。双高电流,MOSFET驱动输出和快速电流检测环路进一步增强了器件的多功能性。
电流模式控制的所有优点包括更简单的环路闭合,电压前馈,与电流共享的并联性,脉冲输出UCC3806系列可以很容易地实现脉冲电流限制和推挽对称校正。
这些器件提供多种封装选择,适用于通孔和表面贴装应用;在商业,工业和军用温度范围内。
UCC3806的工作温度范围为-55°C至+ 125°C,UCC2806的工作温度范围为-40°C至+ 40°C +温度为85°C,UCC3806的额定工作温度范围为0°C至+ 70°C。
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 |
UCC2806 | UC2846 | UC2856 | UCC28089 |
---|---|---|---|
Push-Pull | Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull | Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull | Full-Bridge Half-Bridge Push-Pull |
Current | Current | Current | Current |
7.5 | 6.95 | 7.7 | 8 |
15 | 40 | 40 | 15 |
1000 | 500 | 1000 | 1000 |
7.5/6.75 | 7.7/6.95 | 7.7/7 | 10.5/8.0 |
49 | 50 | 50 | 50 |
0.5 | 0.5 | 1.5 | 1 |
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 | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology Soft Start Synchronization Pin | Dead Time Control Soft Start Synchronization Pin |
Catalog | Catalog | Catalog | Catalog |
-40 to 85 | -40 to 85 | -40 to 85 | -40 to 105 |
16PDIP 16SOIC 16SOIC 16SSOP 16TSSOP | 16PDIP 16SOIC | 16PDIP 16SOIC | 8SOIC |