EV3021DQ-00A 1x, 1.5x, 2x Auto-Adjust Charge Pump White LED Backlight Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV3021DQ-00A is the Evaluation Board for the MP3021, a WLED driver that can drive up to 4 backlight WLEDs at up to 30mA each. Backlight brightness can be adjusted with a 5-bit register plus one bit for precise low brightness control. • • • • • Backlight: up to 4 WLEDs at 30mA Each Single Wire Serial Bus (MPCTM Serial Data Link) Simple, Low Overhead Solution Fast Data Transfer Rate Thermal Shutdown Protection Under-Voltage Protection Available in a 3mm x 3mm 16-Pin QFN Package The MP3021 employs an efficient inductorless charge pump with 1x, 1.5x and 2x automatic mode control to achieve high efficiency power conversions. APPLICATIONS Monolithic Power System’s single wire MPCTM serial data link provides a simple and fast interface used to enable, disable and set current levels for each LED. In addition, soft-start limits the inrush current during startup and mode switching. MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. • • • Cellular Phones PDA Phones PDAs MPC is a Trademark of Monolithic Power Systems, Inc. ELECTRICAL SPECIFICATIONS Parameter Input Voltage # of WLEDs LED Current Symbol Value Units VIN 2.5 – 5.5 4 30 V ILED mA EV3021DQ-00A EVALUATION BOARD Efficiency vs Battery Voltage 100 I_LED=10mA EFFICIENCY (%) 90 80 70 60 50 I_LED=20mA I_LED=30mA 40 30 (L x W x H) 2.6” x 2.5” x 0.4” (6.6cm x 6.4cm x 1.0cm) Board Number MPS IC Number EV3021DQ-00A MP3021DQ EV3021DQ-00A Rev. 1.2 10/18/2007 20 2.5 3.0 3.5 4.0 BATTERY VOLTAGE (V) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 4.5 1 EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP EVALUATION BOARD SCHEMATIC R17 0 R18 0 LED2 LED3 LED4 LED2 LED0 LED1 LED1 R16 0 LED3 R15 0 CP VCC NC U1 C2B MP3021 C1B C1A NC VIN DATA C2A NC VSS JPI ISET VIN GND TP_CLKIN VPP VCC GND GP0 GP1 TP1 TP2 TP3 TP4 TP5 TP_GP0 TP_GP1 VCC VCC VDD VSS CLKIN GP0 PIC12F675 TP_CLKOUT CLKOUT GP1 VPP GP2 U2 TP_VPP SW3 BRIGHT DOWN PATTERN GENERATION CIRCUIT EV3021DQ-00A Rev. 1.2 10/18/2007 Bit5 Bit4 Bit3 Bit2 1 Bit0 BRIGHT UP 0 SW2 Bit1 SW1 TP_GP2 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 2 EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP EV3021DQ-00A BILL OF MATERIALS Qty Ref Value Description Package 4 C1,C2,C3,C4 1µF 16V/X7R Ceramic Cap. SM0603 4 LED1~LED4 NS No Stuff 4.22kΩ 1 R1 Film Res, 1% 603 0Ω 4 R15~R18 Film Res, 5% 603 1 U1 White LED Driver 3x3 QFN16 Manufacturer muRata Manufacturer P/N GRM188R71C105KA Panasonic Panasonic MPS ERJ-3EKF4221V ERJ-3GEY0R00V MP3021DQ EV3021DQ-00A PATTERN GENERATION CIRCUIT BILL OF MATERIALS Qty 1 1 1 3 5 3 2 1 Ref C5 SW3 JP1 R6,R8,R10 R4,R5,R12, R13,R14 R7,R9,R11 SW1,SW2 U2 EV3021DQ-00A Rev. 1.2 10/18/2007 Value Description Package 1µF 16V/X7R Ceramic Cap. SM0603 6 POS Top slide DIP switch DIP 12 DIP Jumper 5.1kΩ Film Res, 1% 603 10kΩ 15kΩ Switch Film Res, 1% Film Res, 1% Push Switch Microcontroller 603 603 5mmx5mm SO-8 Manufacturer muRata Digi-Key Digi-Key Panasonic Manufacturer P/N GRM188R71C105KA CKN1290-ND WM18533-ND ERJ-3EKF5111V Panasonic Panasonic Digi-Key Microchip ERJ-3EKF1002V ERJ-3EKF1502V CKN9020-ND PIC12F675 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 3 EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV3021DQ-00A Rev. 1.2 10/18/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 4 EV3021DQ-00A – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP QUICK START GUIDE 1. Solder LED1 – LED4, and Flash LED to the board if they are not populated. 2. Turn off the power supply. 3. Attach the positive terminal of the power supply (2.5V - 5.5V) to the VIN. 4. Attach the negative terminal of the power supply to GND pin. 5. Set the number of LEDs by SW3. See Table below and make sure it is in position. Always set Mode bits to “00”. On/Off Bit HC/LC Bit 0 1 1-bit 1-bit <0> <1> <0> <1> OFF ON High Current Low Current LED Sel Bits 2 3 2-bits <23> <00> <11> <10> <01> All On 1 LED On 2 LEDs On 3 LEDs On Mode Bits 4 Brightness Bits 5 6 2-bits <45> <00> 7 8 9 10 5-bits BL Only <678910> <00000> 1 x Max Brightness / 32 <10000> 2 x Max Brightness / 32 <01000> 3 x Max Brightness / 32 <11000> 4 x Max Brightness / 32 . . . . . . <11111> Max Brightness 6. Turn on the power supply. 7. Push the “BRT UP” or “BRT DOWN” button to control the brightness of the LEDs. One push represents one level brightness change. Push and hold the button will continuously increase or decrease the brightness. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV3021DQ-00A Rev. 1.2 10/18/2007 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. 5