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2018 Microchip Technology Inc.

DS-50002780A

MIC4802

Evaluation Board

User’s Guide

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Summary of Contents for MIC4802

Page 1: ...2018 Microchip Technology Inc DS 50002780A MIC4802 Evaluation Board User s Guide...

Page 2: ...eceived ISO TS 16949 2009 certification for its worldwide headquarters design and wafer fabrication facilities in Chandler and Tempe Arizona Gresham Oregon and design centers in California and India T...

Page 3: ...ard Description 10 1 4 MIC4802 Evaluation Board Kit Contents 10 Chapter 2 Installation and Operation 2 1 Introduction 11 2 2 Evaluation Board Description 12 2 2 1 Current Set Resistor R4 12 2 2 2 Enab...

Page 4: ...2018 Microchip Technology Inc DS 50002780A page 4...

Page 5: ...valuation Board Appendix A Schematic and Layouts Shows the schematic and PCB layout diagrams for the MIC4802 Evaluation Board Appendix B Bill of Materials BOM Lists the parts used to build the MIC4802...

Page 6: ...ld characters A dialog button Click OK A tab Click the Power tab N Rnnnn A number in verilog format where N is the total number of digits R is the radix and n is a digit 4 b0010 2 hF1 Text in angle br...

Page 7: ...ess of Microchip Product selector and ordering guides latest Microchip press releases listing of seminars and events listings of Microchip sales offices distributors and factory representatives PRODUC...

Page 8: ...MIC4802 Evaluation Board User s Guide DS 50002780A page 8 2018 Microchip Technology Inc NOTES...

Page 9: ...1 2 2 MIC4802 Device Overview The MIC4802 is a high efficiency White LED WLED linear driver designed to drive a single LED up to 800 mA The MIC4802 provides the highest possible efficiency as this arc...

Page 10: ...JP1 header Since it s not recommended to leave the EN pin floating the MIC4802 Evaluation Board features a 10 k pull up resistor to VIN so the default value when the board is powered is ON The EN pin...

Page 11: ...ith cathode terminals in order to evaluate the MIC4802 at maximum performance 800 mA To do so it is necessary to remove the Evaluation Board LED and modify the R4 from 8 2 k 600 mA to 6 19 k 800 mA To...

Page 12: ...quivalent to the enable pin for the linear drivers on the MI4802 It can also be used for dimming by applying a PWM signal as shown in the following scope shots Pulling the EN low for more than 40 ms p...

Page 13: ...50002780A page 13 FIGURE 2 3 MIC4802 at 50 Duty Cycle FIGURE 2 4 MIC4802 at 80 Duty Cycle EN 5V div 20 MHz D1 2V div 20 MHz BW ILED 500 mA div 20 MHz BW VIN 5V Time 5 ms div ILED 500mA div 20 MHz BW D...

Page 14: ...ip Technology Inc FIGURE 2 5 MIC4802 at 1 Duty Cycle FIGURE 2 6 MIC4802 Stand by to ON Transition EN 5V div 20 MHz BW D1 2V div 20 MHz BW ILED 500mA div 20 MHz BW VIN 5V Time 5 ms div EN 5V div 20 MHz...

Page 15: ...er ring in tip measurement is required Standard oscilloscope probes come with a grounding clip or a long wire with an alligator clip Unfortunately for high frequency measurements this ground clip can...

Page 16: ...MIC4802 Evaluation Board User s Guide DS 50002780A page 16 2018 Microchip Technology Inc NOTES...

Page 17: ...matic and Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the MIC4802 Evaluation Board Board Schematic Board Top Silk Layer Board Top Copper and Silk Layer Boa...

Page 18: ...2 BOARD SCHEMATIC VIN 1 EN 2 RSET 3 GND 4 D1 5 D1 6 D1 7 D1 8 EPAD 9 MIC4802 U1 2 2uF 16V 0805 C1 2 2uF 16V 0805 DNP C2 0R 0603 R1 10k 0603 1 R3 6 19k 0603 1 R4 J1 VBAT 1 2 JP1 J2 VIN J3 GND J4 RSET...

Page 19: ...Schematic and Layouts 2018 Microchip Technology Inc DS 50002780A page 19 A 3 BOARD TOP SILK LAYER...

Page 20: ...MIC4802 Evaluation Board User s Guide DS 50002780A page 20 2018 Microchip Technology Inc A 4 BOARD TOP COPPER AND SILK LAYER...

Page 21: ...Schematic and Layouts 2018 Microchip Technology Inc DS 50002780A page 21 A 5 BOARD TOP COPPER LAYER...

Page 22: ...MIC4802 Evaluation Board User s Guide DS 50002780A page 22 2018 Microchip Technology Inc A 6 BOARD BOTTOM COPPER LAYER...

Page 23: ...Schematic and Layouts 2018 Microchip Technology Inc DS 50002780A page 23 A 7 BOARD BOTTOM COPPER AND SILK LAYER...

Page 24: ...MIC4802 Evaluation Board User s Guide DS 50002780A page 24 2018 Microchip Technology Inc A 8 BOARD BOTTOM SILK LAYER...

Page 25: ...SY0R00V 1 R2 RES TKF 100k 1 1 10W SMD 0603 Panasonic ECG ERJ 3EKF1003V 1 R3 RES TKF 10k 1 1 10W SMD 0603 Panasonic ECG ERJ 3EKF1002V 1 R4 RES TKF 8 2k 1 1 10W SMD 0603 Panasonic ECG ERJ 3EKF8201V 1 U1...

Page 26: ...MIC4802 Evaluation Board User s Guide DS 50002780A page 26 2018 Microchip Technology Inc NOTES...

Page 27: ...00 China Xian Tel 86 29 8833 7252 China Xiamen Tel 86 592 2388138 China Zhuhai Tel 86 756 3210040 ASIA PACIFIC India Bangalore Tel 91 80 3090 4444 India New Delhi Tel 91 11 4160 8631 India Pune Tel 91...

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