The UC1584/UC2584/UC3584 is a low voltage, secondary side synchronous post regulator, intended for use in single secondary winding, multiple output power supplies. The UC3584 is most suited for systems where the main output is regulated between 5V and 14V. Output voltages regulated by the UC3584 can range from virtually 0V up to the output voltage of the main output. Auxiliary output voltage regulation with the UC3584 uses leading edge modulation making it compatible to primary side peak current or voltage mode control. The UC3584 clock circuit is synchronized to the switching frequency utilizing the falling edge of the transformer's secondary winding waveform.
The UC1584, UC2584, and UC3584 are low voltage, secondary side synchronous post regulators designed for auxiliary output voltage regulation in single secondary winding, multiple output power supplies. They are most suited for systems where the main output is regulated between 5V and 14V, with output voltages ranging from virtually 0V up to the main output voltage. The devices feature practical operation at switching frequencies up to 1MHz and utilize leading edge modulation for compatibility with primary side peak current or voltage mode control.
| Switching Frequency | up to 1MHz |
|---|---|
| Error Amplifier Gain | 60 to 80 dB |
| Maximum Operating Frequency | 1MHz |
| Soft Start Delay | 50 ms |
| UVLO Threshold | 10.5 V |
| Regulated Voltage | 4.8 to 5.2 V |
The device features practical operation at switching frequencies up to 1MHz.
The UVLO circuit enables operation when VCC reaches 10.5V.
The internal regulated voltage is typically 5V, ranging from 4.8V to 5.2V.