Técnico Electrónico

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
■ General Descriptions
The STR-Y6400 seriesproducts 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 systemsacross 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 thedifferent package (SIP-10) versions.
TO-220F-7

■ Features

Multi-Mode Control
The operation mode switching with four steps according to load conditions achieves the optimal high efficiency and
lownoise 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-SkipQR)
・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 StartupCircuit, enabling low power consumption
Auto-Standby Function with Burst-Oscillation, enabling low standby power(Input power PIN < 100mW at no load)
Soft-ON Function, preventing the audible noisefrom transformer, during the standby operation (burst-oscillation)
and the dynamic load change.
Soft-Start Function
Step-Drive Function, reducing switching noise
Leading Edge Blanking FunctionExternal ON/OFF Function
Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET
Various Protections
Overcurrent Protection (OCP)-------- Pulse-by-Pulse with AC Input Compensation FunctionOverload Protection (OLP) ----------- Latch Shutdown or Auto-Restart Option by changing external components
Overvoltage Protection (OVP) ------- Latch Shutdown

■ Applications
Switching Power...