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It's a Fairchild KA3842B DIP-8 SMPS Controller. It's a fixed frequency current-mode PWM controller. It is designed for Off-Line and DC-to-DC converter applications. It features a trimmed oscillator for precise duty cycle control, a temperature-compensated reference, a high gain error amplifier, and current sensing comparator.
Features:
| Model | KA3842B |
| Type | SMPS Controller |
| Package | DIP-8 |
| Voltage | 30V |
| Output Current | 1A |
| Power Dissipation | 1200mW |
| Storage Temperature Range | -65 to 150 °C |
| Number of Pins | 8 |
| Mounting Type | Through Hole |
