STR3W426MXD Datasheet | Sanken

Off-Line PWM Controllers with Integrated Power MOSFET STR3W400MXD Series Data Sheet Description The STR3W400MXD series is power IC for switching power supplies, incorporating a power MOSFET and a current mode PWM controller IC. The operating mode of the IC automatically changes to green-mode or burst oscillation mode according to load in order to improve the all load efficiency. The product achieves high cost-performance power supply systems with few external ponents. Features - Bare Lead Frame: Pb-free (Ro HS pliant) - Current Mode Type PWM Control - Improving circuit efficiency (Since the step drive control can keep VRM of secondary rectification diodes low, the circuit efficiency can be improved by low VF) - Automatically changed operation mode in response to load conditions Fixed switching frequency mode, 65 k Hz (typ.) Green mode, 30 k Hz (typ.) to 65 k Hz (typ.) Burst oscillation mode - No Load Power Consumption, PIN < 30 m W - Soft Start Function - Random Switching Function - Slope pensation Function (Subharmonic Oscillation Prevention) - Leading Edge Blanking Function - Bias Assist Function - Protections - Two Types of Overcurrent Protection (OCP): Pulseby-Pulse, built-in pensation circuit to minimize OCP point variation on AC input voltage - Overload Protection (OLP): Auto-restart - AC Input Voltage Detection Function Overvoltage Protection (HVP): Auto-restart Brown-In and Brown-Out Function: Auto-restart - Overvoltage Protection (OVP): Auto-restart - Thermal Shutdown (TSD): Auto-restart with hysteresis Typical Application BR1 C1 STR3W424MXD U1 D51 T1 L51...