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Manual Samsung S3F84A5

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Summary
  • Samsung S3F84A5 - page 1

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

  • Samsung S3F84A5 - page 2

    Important Notice The information in this publication has b een carefully checked and is believed to be entirely a ccurate at the time of publication. Samsung assumes no responsibility, however, for possible errors or omissions, or for any consequences resulting from the use of the information contained h erei n. Samsung reserves the right to make c ...

  • Samsung S3F84A5 - page 3

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

  • Samsung S3F84A5 - page 4

    Table of Contents 1 Overview of HPLED Light ing Control System ............................................ 7 1.1 Pin Assignment in S3F84P4 .................................................................................................. ......................7 1.2 Key Features of S3F84P4 ........................................................... ...

  • Samsung S3F84A5 - page 5

    List of Figures Figure Title Page Number Number Figure 1-1 S3F84P 4 Pin Assignment ............................................................................................ .........................7 Figure 1-2 Simplif ied Buck Circuit ........................................................................................... ................... ...

  • Samsung S3F84A5 - page 6

    List of Tables Table Title Page Number Number Table 4-1 System va lidation of efficiency .................................................................................... .........................16 Table 5-1 BOM lis t of Key Circuit ............................................................................................ .................... ...

  • Samsung S3F84A5 - page 7

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVER VIEW OF HPLED LIGHTING CONTROL SYSTEM 1 OVER VIEW OF HPLED LIGHTING CONTROL SYSTEM A light-emitting diode (LED) is a semiconductor light source that presents several advantages over traditional light (like incandescent) sou rces such as lower energy co nsumption , longer lifetime , improved robustness, s ...

  • Samsung S3F84A5 - page 8

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVER VIEW OF HPLED LIGHTING CONTROL SYSTEM 1.2 KEY FEATURES OF S3F84P4 The key features in S3F84P4 include:  4 kbyte Flash ROM or 208 Byte SRAM  6+6 PWM x 1  10-bit ADC x 4  8-bit Basic Timer (can b e use d as watchdog timer)  16-bit Timer0 (can be used as Time r A or B, the two 8-bit Timers ) ...

  • Samsung S3F84A5 - page 9

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVER VIEW OF HPLED LIGHTING CONTROL SYSTEM 1.3.1 BUCK CIRCUIT Figure 1-2 Simp lified Buck Circuit Buck circuit works when a switch si gnal turns on the transi stor (Q). The DC po we r then starts to charge the coil (L). When the current reaches a predefined level, change t he transistor state from On to Off u ...

  • Samsung S3F84A5 - page 10

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 1 OVER VIEW OF HPLED LIGHTING CONTROL SYSTEM 1.3.3 CONSTANT CURRENT C ONT ROL Refer to the HKP-D1W1 datasheet to see the relation ship of forward voltage, forward cu rrent, and relative luminous flux. Figure 1-4 HKP-D1W1 Forward Voltage, Forward Current, and Relativ e Luminous Flux As shown in Figure 1-4 , desc ...

  • Samsung S3F84A5 - page 11

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 2 HARDWARE IMPLEMENTATION 2 HARDW ARE IMPLEMENT A TION 2.1 SYSTEM DIAG RAM AND CIRCUIT Figure 2-1 Control Circuit As shown in Figure 2-1 , the Buck Circuit comprise of Q1, L1, D1, a nd C2. The o utput of PWM turns on/off the transistor (Q1). The cu rrent over HPLED is sensed by a 1ohm power re sistor. It then g ...

  • Samsung S3F84A5 - page 12

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 2 HARDWARE IMPLEMENTATION 2.2 COMPONENTS SELECTION Assume the following two conditions: ( 1 ) 3.5 0.35 3.85 OF W F W V V I ohm V      5 I VV  If non-divided system clock is selected as the cl ock so urce of the 6+6 PWM, its base frequency is 6 125 2 OSC f KHz  . 2.2.1 SELECT THE INDUCTAN ...

  • Samsung S3F84A5 - page 13

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 3 SOFTWARE IMPLEMENTATION 3 SOFTW ARE IMPLEMENT A TION S amsun g Con f idential 13 Figure 3-1 shows the software implementation. Initialization Value > max ? ADC sampling Vale < min ? Decrease PWM duty cy cle Increase PWM duty cy cle Figure 3-1 Softw are Implementation Diagram Since the PWM in S3F84P4 is ...

  • Samsung S3F84A5 - page 14

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 3 SOFTWARE IMPLEMENTATION N Y Decrease PWM duty cycle Start PWMEX>=100B? PWMEX = 0xFF PWMDATA - =1 End PWMEX - =1 N Y Increase PWM duty cycle Start PWMEX>= 11111100B? PWMEX + = 1 End PWMEX = 0 PWMDATA + =1 Figure 3-2 Wa y to change PWM duty cycle  Change rate of PWM duty cycle: If PWM in S3F84P4 is 6+6 ...

  • Samsung S3F84A5 - page 15

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 4 SYSTEM VALIDATION 4 SYSTEM V ALIDA TION Figure 4-1 shows the current ripple and voltage rippl e test wa veform. Red and blue colors sp ecify the cu rrent and voltage, respectively. Figure 4-1 Waveform for HPLED forward voltage and current () (I ) s fd s s ps MCU ps V VV R efficienc y I V    5 p ...

  • Samsung S3F84A5 - page 16

    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 BD2 BD1 BD 2 BD1 BD2 Ips (power supply) (mA) 300 288 306 285 300 288 309 290 308 304 Imcu (m A) (MCU 供 电 LED) 18 19 18 19 18 19 18 19 18 19 3.82 3.6 3.85 3.60 3.86 3.6 3.90 3.59 3.90 3.65 Vfd V ） 357 340 359 3 ...

  • Samsung S3F84A5 - page 17

    S3F84P4_AN_REV0.00 (PRELIMINARY SPEC) 5 APPENDIX S amsun g Con f idential 17 5 APPENDIX 5.1 BOM LIST OF KEY CIRCUIT Table 5-1 shows the BOM l ist of key circ uit . Table 5-1 BOM list of Key Circuit Reference Description Manufacturer Part number R1 1K ohms R2 10 ohms Rs Current sensi ng Re sistor VISHAY  WSR21R000FEA C1 104 C2 47uF Tantalu m Capa ...

Manufacturer Samsung Category Work Light

Documents that we receive from a manufacturer of a Samsung S3F84A5 can be divided into several groups. They are, among others:
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All of them are important, but the most important information from the point of view of use of the device are in the user manual Samsung S3F84A5.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Samsung S3F84A5, service manual, brief instructions and user manuals Samsung S3F84A5. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Samsung S3F84A5.

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A complete manual for the device Samsung S3F84A5, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Samsung S3F84A5 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Samsung S3F84A5.

A complete Samsung manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Samsung S3F84A5 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Samsung S3F84A5, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Samsung S3F84A5, that we can find in the current document
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4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Samsung S3F84A5
5. FAQ - Frequently Asked Questions
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