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2015 Microchip Technology Inc.

DS50002363A-page 3

Object of Declaration: MCP1664 LED Driver Evaluation Board

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Summary of Contents for MCP1664

Page 1: ...2015 Microchip Technology Inc DS50002363A MCP1664 LED Driver Evaluation Board User s Guide...

Page 2: ...Microchip s code protection feature may be a violation of the Digital Millennium Copyright Act If such acts allow unauthorized access to your software or other copyrighted work you may have a right to...

Page 3: ...2015 Microchip Technology Inc DS50002363A page 3 Object of Declaration MCP1664 LED Driver Evaluation Board...

Page 4: ...MCP1664 LED Driver Evaluation Board User s Guide DS50002363A page 4 2015 Microchip Technology Inc NOTES...

Page 5: ...t Overview 1 1 Introduction 11 1 2 MCP1664 Short Overview 11 1 3 What is the MCP1664 LED Driver Evaluation Board 12 1 4 Contents of the MCP1664 LED Driver Evaluation Board 12 Chapter 2 Installation an...

Page 6: ...MCP1664 LED Driver Evaluation Board User s Guide DS50002363A page 6 2015 Microchip Technology Inc NOTES...

Page 7: ...e Appendix A Schematic and Layouts Shows the schematic and layout diagrams for the MCP1664 LED Driver Evaluation Board Appendix B Bill of Materials BOM Lists the parts used to build the MCP1664 LED Dr...

Page 8: ...ve Bold 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 ang...

Page 9: ...the following information Product Support Data sheets and errata application notes and sample programs design resources user s guides and hardware support documents latest software releases and archiv...

Page 10: ...MCP1664 LED Driver Evaluation Board User s Guide DS50002363A page 10 2015 Microchip Technology Inc NOTES...

Page 11: ...2 4V to 5 5V with an undervoltage of 2 3V to start and 1 85V to stop The reference voltage is only 300 mV in order to minimize the losses on the sense resistor and to increase the overall efficiency...

Page 12: ...usting the value of the sense resistor and by doing so modifying the DC current in the LED string Pulse width modulation PWM dimming achieves the same effect as analog dimming by varying the duty cycl...

Page 13: ...Driver Boost Converter 90 180 270 mA Constant Current Application 2 2 FEATURES The MCP1664 LED Driver Evaluation Board has the following features Input voltage range VIN 2 4V to 5 5V with VIN VOUT Un...

Page 14: ...Connect input supply as shown in Figure 2 2 2 Using the variable resistor the duty cycle applied on the EN pin is modified and PWM dimming is obtained When turning the variable resistor from one side...

Page 15: ...oltage For the MCP1664 LED Driver Evaluation Board if the current select switch is set to 90 mA the input voltage range varies from 2 4V to 5 5V when the current select switch is set to 180 mA the inp...

Page 16: ...he inverting and non inverting inputs allows a constant current through R1 equal to I VDD 2R1 which charges the capacitor C2 This way the U2B integrator output increases linearly with time When it rea...

Page 17: ...the triangular waves VTL the amplitude swing and the threshold voltages can be calculated by means of the following equation EQUATION 2 3 TRIANGULAR WAVE AMPLITUDE SWING For the MCP1664 LED Driver Ev...

Page 18: ...0002363A page 18 2015 Microchip Technology Inc FIGURE 2 6 Obtaining the Dimming Signal 27 FIGURE 2 7 Dimming Results VIN 4 5V ILED_SET 90 mA DUTY 27 REFERENCE VOLTAGE DIMMING SIGNAL TRIANGULAR WAVE LE...

Page 19: ...Installation and Operation 2015 Microchip Technology Inc DS50002363A page 19 FIGURE 2 8 DIMMING results VIN 4 5V ILED_SET 90 mA DUTY 71 LED CURRENT DIMMING SIGNAL SWITCH SIGNAL...

Page 20: ...MCP1664 LED Driver Evaluation Board DS50002363A page 20 2015 Microchip Technology Inc NOTES...

Page 21: ...EVALUATION BOARD USER S GUIDE Appendix A Schematic and Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP1664 LED Driver Evaluation Board Board Schematic...

Page 22: ...M2 TP7 1 4 2 3 DIP 2 SPST SW1 S VDD DIM1 DIM2 GND GND 10k 1 0603 1 R8 R GND 10k 1 0603 1 R9 R GND DIM1 DIM2 ANALOG DIMMING 3 2 1 A A OUTA A A VSS S 11 VDD D 4 4 U2A 5 6 7 B B OUTB B B VSS S 11 VDD D 4...

Page 23: ...Schematic and Layouts 2015 Microchip Technology Inc DS50002363A page 23 A 3 BOARD TOP SILK A 4 BOARD TOP COPPER AND SILK A 5 BOARD BOTTOM COPPER AND SILK...

Page 24: ...MCP1664 LED Driver Evaluation Board User s Guide DS50002363A page 24 2015 Microchip Technology Inc NOTES...

Page 25: ...FET N CH DMN2050L 7 20V 5 9A 1 4W SOT 23 3 Diodes Incorporated DMN2050L 7 1 PCB Printed Circuit Board MCP1664 LED Driver Evaluation Board 04 10371 1 R1 Res TKF 4 7k 5 1 10W SMD 0603 Panasonic ECG ERJ...

Page 26: ...ology Inc MCP6004 E ST 4 BUMPER CYLIN 0 312 DIA BLK 3M SJ61A11 1 Heat Sink for SMD 22 C W Fischer Elektronik CK SMD B 19 SA 1 Thermal tape Adhesive 0 85 W M K Amec Thermasol FCTS73 10N1 TABLE B 1 BILL...

Page 27: ...MCP1664 LED Driver Evaluation Board 2015 Microchip Technology Inc DS50002363A page 27 NOTES...

Page 28: ...86 24 2334 2829 Fax 86 24 2334 2393 China Shenzhen Tel 86 755 8864 2200 Fax 86 755 8203 1760 China Wuhan Tel 86 27 5980 5300 Fax 86 27 5980 5118 China Xian Tel 86 29 8833 7252 Fax 86 29 8833 7256 ASIA...

Page 29: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Microchip ADM00641...

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