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Description

The STR3A46xHL/HDL series are power ICs for

switching power supplies, incorporating a power

MOSFET and a current mode PWM controller IC.

To enhance efficiency in all load ranges, the IC

automatically shifts its operation to the green mode or

burst oscillation mode, depending on the load. The

product achieves high cost-performance power supply

systems with few external components.

Features

● Bare Lead Frame: Pb-free (RoHS compliant)

● Low Thermal Resistance Package

● 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)

● Noise Reduction

● Current Mode Type PWM Control

● Soft Start Function

● Automatic Standby Function

No Load Power Consumption < 15mW

● Operation Mode

Normal Operation ----------------------------PWM Mode

Light Load Operation----------------------- Green-Mode

Standby -------------------------- Burst Oscillation Mode

● Random Switching Function

● Slope Compensation Function

● Leading Edge Blanking Function

● Bias Assist Function

● Protections

Two Types of Overcurrent Protection (OCP): Pulseby-Pulse, built-in compensation circuit to minimize

OCP point variation on AC input voltage

Overload Protection (OLP): Auto-restart

Overvoltage Protection (OVP): Auto-restart / Latched

shutdowon

Thermal Shutdown (TSD): Auto-restart / Latched

shutdowon