STRW6734
Overview
The STR-W6734 is power IC for quasi-resonant type switching power supply, incorporating a power MOSFET and a controller IC. The product achieves high efficiency and low noise power supply systems by the quasi-resonant operation and the bottom-skip quasi-resonant operation.
- Multi operation mode The operation mode switching according to load conditions achieves the optimal high efficiency and low noise power supply systems across the full load range.
- Current mode control
- Built-in PWM oscillator The PWM operates with the minimum frequency of around 22kHz, until the quasi-resonant signal becomes valid, reduces the stress on components at startup and load-shorted.
- Built-in soft start function
- Step-drive function, reducing switching noise
- Input compensation at overcurrent The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three components.
- Avalanche energy guaranteed by two chips structure (Simplification of surge absorbing circuit)
- Protection functions Overcurrent protection (OCP); Pulse-by-pulse Overload protection (OLP); latched shutdown Overvoltage protection (OVP); latched shutdown
