STR-X6759B SANKEN [Sanken electric], STR-X6759B Datasheet

STR-X6759B

Manufacturer Part Number

STR-X6759B

Description

Power IC for Quasi-Resonant Type Switching Power Supply with High Efficiency

Manufacturer

SANKEN [Sanken electric]

Datasheet

1.STR-X6759B.pdf (2 pages)

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■ ■ ■ ■

The STR-X6700 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-W6700 series products are the different package (TO-220F) 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-X6729

STR-X6737

STR-X6737M

STR-X6756

STR-X6757

STR-X6757N

STR-X6750B

Power IC for Quasi-Resonant Type Switching Power Supply

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

Soft-Start Function

Step-Drive Function, reducing switching noise

Built-in Maximum ON Time Limitation Circuit

Input Compensation at Overcurrent

Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET

Various Protections

Product No.

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.

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

power ON/OFF.

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

components.

・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

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

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

－UVLO Intermittent Oscillation by low 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-X6700 Series

N: Excluding the function

0.189

0.36

0.73

0.62

MAX

( )

(

)

Oscillation

Burst-

Bottom-

Skip QR

STR-X6750F

STR-X6759N

STR-X6759F

STR-X6759B

STR-X6768N

STR-X6769

STR-X6769B

Product No.

MOSFET

DSS

650

800

(V)

0.62

0.385

1.0

0.66

MAX

( )

(

)

Oscillation

Burst-

TO-3PF-7

Bottom-

Skip QR

Related parts for STR-X6759B

STR-X6759B Summary of contents

Page 1

... STR-X6750B 650 0.62 Y: Including the function N: Excluding the function Burst- Bottom Product No. Oscillation Skip STR-X6750F Y Y STR-X6759N N Y STR-X6759F Y Y STR-X6759B Y Y STR-X6768N N Y STR-X6769 N Y STR-X6769B TO-3PF-7 MOSFET R Burst- Bottom Oscillation Skip QR IN MAX DSS ( ...

Page 2

... Make sure that this is the latest version of the document before use. The operation and circuit examples in this document are provided for reference purposes only. Sanken assumes no liability for violation of industrial property, intellectual property, or other rights of Sanken or third parties, that stem from these examples. ...

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