UC3845A
TI
德州仪器
电子元器件分类
电流模式 PWM 控制器
The UCx84xA family of control ICs is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
- .
- Optimized for Off-Line and DC-DC Converters
- .
- Low Start-Up Current < 0.5 mA
- .
- Trimmed Oscillator Discharge Current
- .
- Automatic Feedforward Compensation
- .
- Pulse-by-Pulse Current Limiting
- .
- Enhanced Load Response Characteristics
- .
- Undervoltage Lockout With Hysteresis
- .
- Double Pulse Suppression
- .
- High-Current Totem Pole Output
- .
- Internally-Trimmed Bandgap Reference
- .
- Up to 500-kHz Operation