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