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
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Thermal Shutdown (TSD): Auto-restart / Latched
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