Samsung S3F84A5 Uživatelský manuál

APPLICATION NOTE S3F84A5 An LED Lighting System January 2010 Revision 0.00 Confidential Proprietary of Samsung Electronics Co., Ltd Copyright © 2010

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVERVIEW OF HPLED LIGHTING CONTROL SYSTEM 1.3.3 CONSTANT CURRENT CONTROL Refer to the HKP-D1W1 datasheet t

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 2 HARDWARE IMPLEMENTATION 2 HARDWARE IMPLEMENTATION 2.1 SYSTEM DIAGRAM AND CIRCUIT Figure 2-1 Co

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 2 HARDWARE IMPLEMENTATION 2.2 COMPONENTS SELECTION Assume the following two conditions: ( 1 ) 3.5 0.35 3.85O

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 3 SOFTWARE IMPLEMENTATION 3 SOFTWARE IMPLEMENTATION Samsung Confidential 13 Figure 3-1 shows the software

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 3 SOFTWARE IMPLEMENTATION NYDecrease PWM duty cycleStartPWMEX>=100B?PWMEX = 0xFFPWMDATA - =1EndPWMEX - =1

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 4 SYSTEM VALIDATION 4 SYSTEM VALIDATION Figure 4-1 shows the current ripple and voltage ripple test waveform

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 4 SYSTEM VALIDATION Table 4-1 System validation of efficiency #1 #2 #3 #4 #5 BD1 BD2 BD1 BD2 BD1 B

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 5 APPENDIX Samsung Confidential 17 5 APPENDIX 5.1 BOM LIST OF KEY CIRCUIT Table 5-1 shows the BOM list o

Important Notice The information in this publication has been carefully checked and is believed to be entirely accurate at the time of publication. Sa

Revision History Revision No. Date Description Author(s) 0 Jan. 20, 2010 - Initial draft Wei Ningning

Table of Contents 1 Overview of HPLED Lighting Control System...7 1.1 Pin Assignment in S3F84P4 ...

List of Figures Figure Title Page Number Number Figure 1-1 S3F84P4 Pin Assignment...

List of Tables Table Title Page Number Number Table 4-1 System validation of efficiency...

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVERVIEW OF HPLED LIGHTING CONTROL SYSTEM 1 OVERVIEW OF HPLED LIGHTING CONTROL SYSTEM A light-emitting dio

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVERVIEW OF HPLED LIGHTING CONTROL SYSTEM 1.2 KEY FEATURES OF S3F84P4 The key features in S3F84P4 include:

S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVERVIEW OF HPLED LIGHTING CONTROL SYSTEM 1.3.1 BUCK CIRCUIT Figure 1-2 Simplified Buck Circuit