TO-220F-7

STR-Y6400

Series

Power IC for Quasi-Resonant Type Switching Power Supply

with High Efficiency, Low Noise and Low Standby Power

in Full Load Range

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The STR-Y6400 series products are power ICs for quasi-resonant switching type power

supplies, incorporating a power MOSFET and a controller IC. The product achieves high

efficiency and low noise power supply systems across the full load range, by the low standby

power, the quasi-resonant operation, the bottom-skip quasi-resonant operation, and the

burst-oscillation.

The STR-L6400 series products are the different package (SIP-10) versions.

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Multi-Mode Control

The operation mode switching with four steps according to load conditions achieves the optimal high efficiency and

low noise power supply systems across the full load range.

・In Standby: Auto Standby (Auto Burst-Oscillation)

・Under Low to Middle Load Conditions: 1 or 2 Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR)

・Under Middle to Rating (or Heavy) Load Conditions: Quasi-Resonant Operation (QR)

Current-Mode Control

Bottom-Skip Function with Delay Time Setting, enabling stable switching

Built-in Startup Circuit, enabling low power consumption

Soft-ON Function, preventing the audible noise from transformer, during the standby operation (burst-oscillation)

and the dynamic load change.

Soft-Start Function

Step-Drive Function, reducing switching noise

Leading Edge Blanking Function

External ON/OFF Function

Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET

Various Protections

Overcurrent Protection (OCP)-------- Pulse-by-Pulse with AC Input Compensation Function

Overload Protection (OLP) ----------- Latch Shutdown or Auto-Restart Option by changing external components

Overvoltage Protection (OVP) ------- Latch Shutdown

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Switching Power Supplies for

Digital Consumer Equipment; LCD-TVs, BD/DVD Players/Recorders, etc., Home Appliance (White Goods),

OA Equipments, Industry Machines, Communication Devices, Others

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Product No.

MOSFET

( )

STR-Y6453

1.8

STR-Y6456

650

0.73

STR-Y6473

3.6

STR-Y6476

850

1.3