SANKEN ELECTRIC CO., LTD.

Description

The STR2W152D and STR2W153D are power ICs for

switching power supplies, incorporating a power MOSFET

and a current mode PWM controller IC in one package.

Including a startup circuit and a standby function in the

controller, the products achieve low power consumption, low

standby power, and high cost-effectiveness in power supply

systems, while reducing external components.

The products are provided in fully molded TO-220 package

types. Pin 2 is deleted for greater isolation.

Features and Benefits

• Current mode PWM control

• Built-in Random Switching function: reduces EMI noise,

simplifies EMI filters, and cuts cost by external part

reduction

• Built-in Slope Compensation function: avoids

subharmonic oscillation

• Built-in Leading Edge Blanking (LEB) function

• Auto Standby function:

▫ Normal load operation: PWM switching

▫ Light load operation: Standby mode (Burst oscillation)

• Soft Start function: reduces stress on internal power

MOSFET and output rectifier diode

Current Mode Control PWM Regulator ICs

For Switching Power Supplies

Typical Application

Package: TO-220F-6L

Not to scale

STR2W152D and STR2W153D

Continued on the next page…

STR2W100D-DS

VAC

C1

C5

R3

D3

D2

R2

C2

T1

D4

C6

R4

R5

U2

R9

R7

C7

D

P

S

PC1

PC1

C3

C9

CRD Clamp Snubber Circuit

D1

R6

R8

L2

C8

C4

C, RC

Damper

Snubber

Circuit

VOUT

GND

1

7

6

5

34

STR

2W100D

U1

Applications

Switching power supplies for electronic devices such as:

• Home appliances

• Digital appliances

• Office automation (OA) equipment

• Industrial apparatus

• Communication facilities

May 14, 2012