The UC2842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC2842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
- Extended Temperature Performance of –40°C to 125°C
- Optimized for Off-line and DC to DC Converters
- Low Start Up Current (<0.5 mA)
- Trimmed Oscillator Discharge Current
- Automatic Feed Forward Compensation
- Pulse-by-Pulse Current Limiting
- Enhanced Load Response Characteristics
- Under-Voltage Lockout With Hysteresis
- Double Pulse Suppression
- High Current Totem Pole Output
- Internally Trimmed Bandgap Reference
- 500 kHz Operation
- Low RO Error Amp
Technical Specifications
| Physical | |
| Case/Package | SOIC |
| Number of Pins | 8 |
| Technical | |
| Duty Cycle | 50 % |
| Fall Time | 50 ns |
| Frequency | 500 kHz |
| Max Duty Cycle | 50 % |
| Max Frequency | 500 kHz |
| Max Operating Temperature | 125 °C |
| Max Supply Voltage | 30 V |
| Min Operating Temperature | -40 °C |
| Number of Outputs | 1 |
| Output Current | 1 A |
| Output Voltage | 15 V |
| Packaging | Tape & Reel |
| Quiescent Current | 11 mA |
| Rise Time | 50 ns |
| Switching Frequency | 500 kHz |
| Topology | Boost, Flyback |
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