SIP-10

STR-L400

Series

Power IC for Quasi-Resonant Type Switching Power Supply

with High Efficiency, Low Noise

Low-Height, and Enough Creepage Isolation (>6mm)

between High and Low Voltage Terminals

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The STR-L400 series products are power ICs for quasi-resonant switching type power

supplies, incorporating a power MOSFET and a controller IC in the SIP-10 package.

The product achieves high efficiency and low noise power supply systems by the

quasi-resonant operation. The product is recommended for the systems requiring low-height

and enough clearance and creepage isolation between high and low voltage terminals.

Quasi-Resonant Operation

Current-Mode Control

Built-in Oscillator for Low Frequency Operation

The operation with low frequency of 50µs OFF time (around 22 kHz), until the quasi-resonant signal becomes

valid, reduces the stress on components at startup and load-shorted.

SIP-10 Package (Sanken designation: STA-10L), recommended for auxiliary power supplies of White Goods.

Straight lead pitch: 2.54mm, Height over PCB: < 12mm

Clearance and Creepage Isolation on PCB between high and low voltage terminals: 6.5mm (4 pins removed)

Input Compensation at Overcurrent

The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three

components.

Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET

Various Protections

Overcurrent Protection (OCP)---------------------------------- Pulse-by-Pulse

Overload Protection (OLP) ------------------------------------- Latch Shutdown

Thermal Shutdown Protection (TSD) ------------------------- Latch Shutdown

Switching Power Supplies for

Standby Power Supplies, Home Appliances (White Goods), Digital Consumer Equipment, OA Equipment,

Industry Machines, Communication Devices, Others

Product No

MOSFET

( )

STR-L451

650

3.95

STR-L472

900

7.7