STR5A100D Series

STR5A100D-DS Rev.1.3

SANKEN ELECTRIC CO.,LTD.

2

Aug. 08, 2014

CONTENTS

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

1.

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

2.

Recommended Operating Conditions --------------------------------------------- 3

3.

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

4.

Performance Curves ------------------------------------------------------------------ 5

5.

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

6.

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

7.

Typical Application Circuit --------------------------------------------------------- 6

8.

Package Outline ------------------------------------------------------------------------ 7

9.

Marking Diagram --------------------------------------------------------------------- 7

10. Operational Description-------------------------------------------------------------- 8

10.1

Startup Operation ------------------------------------------------------------ 8

10.2

Undervoltage Lockout (UVLO) ------------------------------------------- 8

10.3

Auxiliary Winding------------------------------------------------------------ 8

10.4

Soft Start Function ----------------------------------------------------------- 9

10.5

Primary Side Regulation (PSR) ------------------------------------------- 9

10.6

Constant Voltage (CV) Control ------------------------------------------ 10

10.7

Constant Current (CC) Control ------------------------------------------ 10

10.8

Leading Edge Blanking Function ---------------------------------------- 11

10.9

Random Switching Function ---------------------------------------------- 11

10.10 Auto Standby Function----------------------------------------------------- 11

10.11 Overcurrent Protection Function (OCP) ------------------------------- 11

10.12 Overvoltage Protection (OVP)-------------------------------------------- 12

10.13 Thermal Shutdown Protection (TSD) ----------------------------------- 12

11. Design Notes --------------------------------------------------------------------------- 13

11.1

External Components------------------------------------------------------- 13

11.2

PCB Trace Layout and Component Placement ----------------------- 15

12. Pattern Layout Example ------------------------------------------------------------ 17

13. Reference Design of Power Supply ----------------------------------------------- 18

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

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