SSC2102S

SSC2102S-DS Rev.1.2

SANKEN ELECTRIC CO.,LTD.

2

Dec. 08, 2014

CONTENTS

General Descriptions ----------------------------------------------------------------------- 1

1.

Absolute Maximum Ratings--------------------------------------------------------- 3

2.

Electrical Characteristics ------------------------------------------------------------ 3

3.

Functional Block Diagram----------------------------------------------------------- 6

4.

Pin Configuration Definitions------------------------------------------------------- 6

5.

Typical Application Circuit --------------------------------------------------------- 7

6.

Package Outline ------------------------------------------------------------------------ 8

7.

Marking Diagram --------------------------------------------------------------------- 8

8.

Operational Description-------------------------------------------------------------- 9

8.1

Operational Description of Interleaved DCM-------------------------- 9

8.2

Startup Operation ------------------------------------------------------------ 9

8.3

Voltage Control Operation ------------------------------------------------ 10

8.4

High Speed Response Function (HSR)---------------------------------- 11

8.5

Gate Drive--------------------------------------------------------------------- 12

8.6

Overcurrent Protection (OCP) ------------------------------------------- 12

8.7

Overvoltage Protection (OVP)-------------------------------------------- 13

8.8

Open Loop Detection (OLD) ---------------------------------------------- 14

8.9

Open Pin Protection (OPP)------------------------------------------------ 14

8.10

Input Undervoltage Protection (UVP) ---------------------------------- 14

8.11

Thermal Shutdown (TSD) ------------------------------------------------- 14

9.

Parameters Design-------------------------------------------------------------------- 15

9.1

Inductor Design -------------------------------------------------------------- 15

9.2

Overcurrent Detection Resistor, RCS ------------------------------------ 17

10. Design Notes --------------------------------------------------------------------------- 18

10.1

External Components------------------------------------------------------- 18

10.2

PCB Trace Layout and Component Placement ----------------------- 18

OPERATING PRECAUTIONS -------------------------------------------------------- 20

IMPORTANT NOTES ------------------------------------------------------------------- 21