str-w6700 Sanken Electric Co., Ltd., str-w6700 Datasheet

str-w6700

Manufacturer Part Number

str-w6700

Description

Power Ic For Quasi-resonant Type Switching Power Supply With High Efficiency And Low Noise In Full Load Range

Manufacturer

Sanken Electric Co., Ltd.

Datasheet

1.STR-W6700.pdf (2 pages)

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■ ■ ■ ■

The STR-W6700 series products are power ICs for quasi-resonant type switching power

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

efficiency and low noise power supply systems by the quasi-resonant operation and the

bottom-skip quasi-resonant operation.

The STR-X6700 series products are the different package (TO-3PF) versions.

General Descriptions

Features

Applications

Switching Power Supplies for

Product Lineup

Y: Including the function

Digital Consumer Equipment; LCD-TVs, PDP-TVs, CRT-TVs, etc., Home Appliances, OA Equipments,

Industry Machines, Communication Devices, Others

STR-W6723N

STR-W6734

STR-W6735

STR-W6735N

STR-W6753

STR-W6754

Multi-Mode Control

The operation mode switching with three steps according to load conditions achieves the

optimal high efficiency and low noise power supply systems across the full load range.

(The confirmation of product number is necessary because some functions are different

in each product.)

Current-Mode Control

Built-in PWM Oscillator

The PWM operates with the minimum frequency of around 22 kHz, until the quasi-resonant signal becomes

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

Soft-Start Function

Step-Drive Function, reducing switching noise

Built-in Maximum ON Time Limitation Circuit

The function limits the maximum ON time of power MOSFET, during the transitions at low input voltage,

power ON/OFF.

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

Product No.

Power IC for Quasi-Resonant Type Switching Power Supply

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

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

・In Standby (Under Standby Load Conditions):

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

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

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

－UVLO Intermittent Oscillation by lowering output voltage --- Switched by Standby Signal, or

－Auto Burst-Oscillation --- Switched Automatically

with High Efficiency and Low Noise in Full Load Range

MOSFET

DSS

450

500

650

(V)

STR-W6700 Series

N: Excluding the function

MAX

( )

1.4

1.0

0.57

1.7

0.96

(

)

Oscillation

Burst-

Bottom-

Skip QR

STR-W6750F

STR-W6756

STR-W6756N

STR-W6765

STR-W6765N

Product No.

MOSFET

DSS

650

800

(V)

0.73

1.8

MAX

( )

(

)

Oscillation

Burst-

TO-220F-7

Bottom-

Skip QR

Related parts for str-w6700

str-w6700 Summary of contents

Page 1

... High Efficiency and Low Noise in Full Load Range ■ ■ ■ ■ General Descriptions The STR-W6700 series products are power ICs for quasi-resonant type switching power supplies, incorporating a power MOSFET and a controller IC, The product achieves high efficiency and low noise power supply systems by the quasi-resonant operation and the bottom-skip quasi-resonant operation ...

Page 2

... The user must take responsibility for designing and checking to secure the device and system so that a part failure may not lead to human injury, fire, damages, or other losses. The contents in this document must not be transcribed or copied without Sanken’s written consent. SANKEN ELECTRIC CO.,LTD STR-W6700 Input Power - Frequency Heavy 140 140 120 120 ...

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