SD4870 Overview
SD4870 is a current mode PWM controller IC for high performance, low standby power offline flyback converter application. In no load or light load condition, the IC operates in Light Load Mode to reduce switching loss and improve efficiency. Large value startup resistor could be used in the startup circuit to minimize the standby current because of low startup current.
SD4870 Key Features
- Frequency shuffling to improve EMI performance
- Light Load Mode for minimum standby power
- External programmable switching frequency
- 3uA low startup current
- Internal LEB circuit
- VDD over voltage and under voltage protection
- Gate output maximum voltage clamp
- Current limiting
- Over load protection
- SOT-23-6L/SOP8/DIP8 package