SANKEN ELECTRIC CO., LTD.

http://www.sanken-ele.co.jp/en/

Description

The STR-A6051M, STR-A6052M, STR-A6053M, and

STR-A6079M are power ICs for switching power supplies,

incorporating a power MOSFET and a current mode PWM

controller IC in one package.

To achieve low power consumption, these products include

a startup circuit and a standby function in the controller. The

switching modes are automatically changed according to load

conditions: in normal operation, PWM mode, and in light load

conditions, burst mode. The rich set of protection features

helps to realize low component counts, and high performance-

to-cost power supply.

Features and Benefits

▪ Current mode PWM control

▪ Brown-In and Brown-Out function: auto-restart, prevents

excess input current and heat rise at low input voltage

▪ Auto Standby function: improves efficiency by Burst

mode operation in light load

▫ Normal load operation: PWM mode

▫ Light load operation: Burst mode

▪ No load power consumption < 25 mW

▪ Random Switching function: reduces EMI noise, and

simplifies EMI filters

▪ Slope Compensation function: avoids subharmonic

oscillation

▪ Leading Edge Blanking function

PWM Off-Line Switching Regulator ICs

Typical Application Circuit

Not to scale

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STR-A6000M Series

STR-A6000HD-DS

January 8, 2013

Applications:

Switching power supplies for electronic devices such as:

• Battery charger

• Standby power supply

• Small switch-mode power supply (SMPS)

• Auxiliary power supply for controller

Package: DIP8

VAC

C1

C5

R1

D1

BR1

R2

C2

T1

D

P

PC1

C3

C9

CRD clamp snubber

C4

C

（CR）

Dumper snubber

123

4

D/ST D/ST

BR

NC

S/OCP

FB/OLP

GND

VCC

87

5

STR-A6000

U1

D2

C10

D51

C51

R51

R52

U51

R54

R56

C52

S

PC1

R53

R55

L51

C53

VOUT

GND