Description
The STR-W605xS series are power ICs for switching power supplies, incorporating a power MOSFET and a current mode PWM controller IC. Including a startup circuit and a standby function in the controller, the product achieves low power consumption, low standby power, and high cost-effectiveness power supply systems with few external components.

Features and Benefits
▪ TO-220F power package with 30 to 90 W power output
▪ Current Mode PWM control
▪ Built-in Random Switching function, reducing EMI noise, and simplifying EMI filters, and therefore reducing cost
▪ Built-in Slope Compensation function, avoiding subharmonic oscillation
▪ Built-in Auto Standby function (Input Power, PIN < 30 mW at no load)
    ▫ Normal operation: PWM mode
    ▫ Light load operation: Standby mode (burst oscillation)
▪ Built-in Audible Noise Suppression function during Standby mode
▪ Built-in Startup Circuit, reducing power consumption in standby operation, and eliminating external components.
▪ Bias-Assist function, improving startup operation, suppressing VCC voltage drop in operation, and allowing use of smaller VCC capacitor
▪ Built-in Leading Edge Blanking function
▪ Two-chip structure, with a controller and a power MOSFET with guaranteed avalanche energy available to simplify surge absorber circuits
▪ Protection functions:
    ▫ Brown-In and Brown-Out Protection function: auto-restart, prevention of excess input current and heat rise at low input voltage
    ▫ Overcurrent Protection function (OCP): pulse-by-pulse built-in compensation circuit to minimize OCP point variation on AC input voltage
    ▫ Overload Protection function (OLP): auto-restart, built-in timer, reduces heat during overload condition, and no external components required
    ▫ Overvoltage Protection function (OVP): Auto-restart
    ▫ Thermal Shutdown Protection function (TSD): Auto-restart

Applications:
For switching power supplies used in:
• White goods
• Consumer electronics
• Office automation
• Industrial equipment
• Communication equipment