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SANKEN ELECTRIC CO., LTD.

LC5560LD-DS

Single-Stage Power Factor Corrected

Off-Line Switching Regulator ICs

LC5560LD

Series

November 26, 2012

Functional Block Diagram

S/GND

TSD

LEB

D/ST

STARTUP

Reg

Bias

UVLO

VCC

OCP

OVP

OSC

OCP

Detection

Bottom

Reg

Control

Feedback

OLP

⑧

①

②

③

④

Drv

COMP

⑥ ISENSE

Q

S

R

OTA

⑤ VREF

Control Part

Pin List Table

Number

Name

Function

1

S/GND

MOSFET source and GND pin for the Control Part

2

VCC

Supply voltage input and Overvoltage Protection (OVP) signal input

3

OCP

Overcurrent Protection (OCP), quasi-resonant signal input, and

Overvoltage Protection (OVP) signal input

4

COMP

Feedback phase-compensation input

5

VREF

Dimming control signal input

6

ISENSE

Output current detecting voltage input and Overvoltage Protection (OVP)

signal input

7

–

Pin removed

8

D/ST

MOSFET drain pin and input of the startup current

1

2

3

4

8

6

5

D/ST

ISENSE

VREF

S/GND

VCC

OCP

COMP

Pin-out Diagram