Microchip Technology MCP1643 User Manual Download Page 22

DS20005196A-page 22

 2013 Microchip Technology Inc.

AMERICAS

Corporate Office

2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200 
Fax: 480-792-7277
Technical Support: 

http://www.microchip.com/
support

Web Address: 

www.microchip.com

Atlanta

Duluth, GA 
Tel: 678-957-9614 
Fax: 678-957-1455

Boston

Westborough, MA 
Tel: 774-760-0087 
Fax: 774-760-0088

Chicago

Itasca, IL 
Tel: 630-285-0071 
Fax: 630-285-0075

Cleveland

Independence, OH 
Tel: 216-447-0464 
Fax: 216-447-0643

Dallas

Addison, TX 
Tel: 972-818-7423 
Fax: 972-818-2924

Detroit

Farmington Hills, MI 
Tel: 248-538-2250
Fax: 248-538-2260

Indianapolis

Noblesville, IN 
Tel: 317-773-8323
Fax: 317-773-5453

Los Angeles

Mission Viejo, CA 
Tel: 949-462-9523 
Fax: 949-462-9608

Santa Clara

Santa Clara, CA 
Tel: 408-961-6444
Fax: 408-961-6445

Toronto

Mississauga, Ontario, 
Canada
Tel: 905-673-0699 
Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733
Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8569-7000 
Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511
Fax: 86-28-8665-7889

China - Chongqing

Tel: 86-23-8980-9588
Fax: 86-23-8980-9500

China - Hangzhou

Tel: 86-571-2819-3187 
Fax: 86-571-2819-3189

China - Hong Kong SAR

Tel: 852-2943-5100 
Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460
Fax: 86-25-8473-2470

China - Qingdao

Tel: 86-532-8502-7355
Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533 
Fax: 86-21-5407-5066

China - Shenyang

Tel: 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

China - Xiamen

Tel: 86-592-2388138 
Fax: 86-592-2388130

China - Zhuhai

Tel: 86-756-3210040 
Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444 
Fax: 91-80-3090-4123

India - New Delhi

Tel: 91-11-4160-8631
Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-3019-1500

Japan - Osaka

Tel: 81-6-6152-7160 
Fax: 81-6-6152-9310

Japan - Tokyo

Tel: 81-3-6880- 3770 
Fax: 81-3-6880-3771

Korea - Daegu

Tel: 82-53-744-4301
Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200
Fax: 82-2-558-5932 or 
82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857
Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870
Fax: 60-4-227-4068

Philippines - Manila

Tel: 63-2-634-9065
Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870
Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-5778-366
Fax: 886-3-5770-955

Taiwan - Kaohsiung

Tel: 886-7-213-7828
Fax: 886-7-330-9305

Taiwan - Taipei

Tel: 886-2-2508-8600 
Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351
Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39
Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 
Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 
Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 
Fax: 49-89-627-144-44

Italy - Milan 

Tel: 39-0331-742611 
Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 
Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90
Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869
Fax: 44-118-921-5820

Worldwide Sales and Service

08/20/13

Summary of Contents for MCP1643

Page 1: ...2013 Microchip Technology Inc DS20005196A MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide...

Page 2: ...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 sue for relief u...

Page 3: ...2013 Microchip Technology Inc DS20005196A page 3 Object of Declaration MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide...

Page 4: ...MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide DS20005196A page 4 2013 Microchip Technology Inc NOTES...

Page 5: ...erview 1 1 Introduction 11 1 2 MCP1643 Short Overview 11 1 3 What is the MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board 12 1 4 MCP1643 Synchronous Boost LED Constant Current...

Page 6: ...MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide DS20005196A page 6 2013 Microchip Technology Inc NOTES...

Page 7: ...egulator Evaluation Board and a description of the user s guide Appendix A Schematic and Layouts Shows the schematic and layout diagrams for the MCP1643 Synchronous Boost LED Constant Current Regulato...

Page 8: ...A menu path File Save 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 b001...

Page 9: ...gn resources user s guides and hardware support documents latest software releases and archived software General Technical Support Frequently Asked Questions FAQs technical support requests online dis...

Page 10: ...MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide DS20005196A page 10 2013 Microchip Technology Inc NOTES...

Page 11: ...ith a minimum number of external components for applications powered by one cell two cell Alkaline NiCd or NiMH batteries The MCP1643 is a PWM only device that operates at a fixed 1 MHz switching freq...

Page 12: ...reduce the product design cycle time Four output currents can be selected 25 50 75 and 100mA The output current can be changed with a dual switch that changes the external LED current sense equivalent...

Page 13: ...mponents When disabled using the EN switch the true disconnect option removes the normal boost topology path from input to output FIGURE 2 1 Synchronous Boost 25 50 75 100 mA Constant Current Applicat...

Page 14: ...the device The package selected for the MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board is the MSOP 8 SW1 is the Enable switch which gives the state of the converter ON or OF...

Page 15: ...typical By varying the duty cycle of the PWM signal applied on EN input the LED current is changing linearly and the light intensity changes as well A 0 R1 resistor is used for bench testing By remov...

Page 16: ...MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide DS20005196A page 16 2013 Microchip Technology Inc NOTES...

Page 17: ...echnology Inc DS20005196A page 17 Appendix A Schematic and Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP1643 Synchronous Boost LED Constant Current R...

Page 18: ...nology Inc A 2 BOARD SCHEMATIC VIN 8 SW 5 VOUT 4 NC 3 EN 1 7 VFB 2 PGND 6 U1 MCP1643 MSOP 8 GND SW_SMD_DIP SW2A SW2B 1 2 LD1 J3 J4 1 J1 1 J2 J5 J6 SW1 2 4 R4 10uF C1 10uF C2 DNP 10uF 0805 C3 0 R1 4 7u...

Page 19: ...Schematic and Layouts 2013 Microchip Technology Inc DS20005196A page 19 A 3 BOARD TOP SILK AND PADS A 4 BOARD TOP COPPER A 5 BOARD BOTTOM COPPER...

Page 20: ...MCP1643 Synchronous Boost LED Constant Current Regulator Evaluation Board User s Guide DS20005196A page 20 2013 Microchip Technology Inc NOTES...

Page 21: ...Inc MLEAWT A1 R250 0004E5 1 R1 Resistor 1206 0R0 Welwyn Components WCR1206 R005JI 3 R4 Resistor 0805 2R4 5 0 125W Panasonic ECG ERJ 6RQF2R4V 1 R6 Resistor 1M Ohm 1 10W 1 0603 SMD Panasonic ECG ERJ 3E...

Page 22: ...Tel 86 21 5407 5533 Fax 86 21 5407 5066 China Shenyang Tel 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 5...

Page 23: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Microchip ADM00435...

Reviews: