STR6251 데이터 시트보기 (PDF) - Sanken Electric co.,ltd.

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STR6251

PWM Off-Line Switching Regulator ICs

Sanken Electric co.,ltd. 

STR-W6251D,

STR-W6252D, and

STR-W6253D

Functional Block Diagram

PWM Off-Line Switching Regulator ICs

VCC

FM /ELP

FB

UVLO

15.5 V / 8.9 V

REG

VREG

PWM OSC

Dmax 75%

SQ

R

28.5 V OVP

7.1 V ELP

TSD

7.1 V

RESET

R

SQ

RQ

S

STARTUP

Istartup

=1.6 mA

DRV

Frequency

Modulation

7.8 V

160 μA

S2

Q

OLP

CK

tDLY = S1

tFM ×16 R

Slope

Compensation

OCP

Drain Peak Current

Compensation

Feedback

Control

LEB

D/ST

S/OCP

GND

Pin-out Diagram

1 D/ST

3 S/GND

4 VCC

5 GND

6 FB

7 FM/ELP

(LF2003)

Pin List Table

Number

Name

1

D/ST

2

–

3

S/OCP

4

VCC

5

GND

6

FB

7

FM/ELP

Function

MOSFET drain and input of the startup current

(Pin removed)

MOSFET source and input of Overcurrent Protection (OCP) signal

Power supply voltage input for Control Part and input of Overvoltage

Protection (OVP) signal

Ground

Input for constant voltage control signal

Capacitor connection pin for frequency modulation and input of

External Latch Protection

STR-W6200D-DS

SANKEN ELECTRIC CO., LTD.

9

November 12, 2012

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