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| TM EV3011DQ-00A 1x, 1.5x, 2x High Efficiency Charge Pump 2 White LED Driver Evaluation Board The Future of Analog IC Technology TM DESCRIPTION The EV3011DQ-00A is an evaluation board for the MP3011, a fully automatic driver for powering two white LEDs, with up to 4V forward voltage, from a single Li-Ion or three NiMH cells. The driver performs all of the sensing and control to run the LEDs at an optimum charge pump ratio for efficiency without an expensive inductor. The driver allows PWM operation to support brightness control. The tiny 3mm x 3mm QFN16 package and small external capacitors allow for the most compact white LED solution available. FEATURES * * * * * * * * * * * * * * * * 2% LED Current Matching High Efficiency (>93%) Current Source Outputs No Ballast Resistors Required 1x, 1.5x and 2x Automatic Modes Constant Frequency Operation Automatic LED Detection High and Low Frequency PWM Capability 2.5V to 5.5V Operation Less than 1A Leakage during Shutdown Detects Changes in Battery Level No External Schottky Diode Required Soft-Start and Soft Switching Operation Cell Phones PDA or Hand Held Computers White LED Application at 3.6V Supply ELECTRICAL SPECIFICATIONS Parameter # of WLEDs Input Voltage LED Current Symbol VIN ILED Value 2 2.5 - 5.5 40 Units V mA APPLICATIONS "MPS" and "The Future of Analog IC Technology" are Trademarks of Monolithic Power Systems, Inc. EV3011DQ-00A EVALUATION BOARD Efficiency vs Supply Voltage 100 90 80 EFFICIENCY (%) VLED = 3.35V @ 40mA ILED=10mA ILED=40mA 70 60 50 40 30 20 10 0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 ILED=20mA (L x W x H) 2.4" x 1.9" x 0.4" (6.1cm x 4.8cm x 1.0cm) Board Number EV3011DQ-00A MPS IC Number MP3011DQ MP3011_EC01 EV3011DQ-00A Rev. 1.1 10/27/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved. 1 TM EV3011DQ-00A - 1X, 1.5X, 2X CHARGE PUMP 2 WHITE LED DRIVER EV BOARD EVALUATION BOARD SCHEMATIC VIN EN 5, 13 U1 BATT C1A 4 12 EN C1B 7 11 RADJ C2A 6 GND 3, 10 GND C2B LED1 9 15 16 TP_LEDC 8 LEDC LED2 MP3011 LED2 LED1 EV3011_S01 EV3011DQ-00A BILL OF MATERIALS Qty 3 1 2 1 1 2 1 Ref C1, C2, C3 C4 LED1, LED2 R1 R2 R3, R4 U1 Value Description 1F Ceramic Cap., 10V, X7R Package Manufacturer P/N 0805 0805 TDK: C2012X7R1A105K TDK: C2012X5R0J475K Panasonic: ERJ-6ENF1541V Panasonic: ERJ-6GEYJ104V Yageo: 9C08052A0R00JLHFT MPS: MP3011DQ Distributor P/N Digikey: 445-1359-1-ND Digikey: 445-1421-1-ND Digikey: P1.54KCCT-ND Digikey: P100KACT-ND Digikey: 311-0.0ACT-ND 4.7F Ceramic Cap., 6.3V, X5R Not Stuffed 1.54k Resistor, 1% 100k Resistor, 5% 0 Resistor, 5% White LED Driver 0805 0805 0805 QFN16 EV3011DQ-00A Rev. 1.1 10/27/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved. 2 TM EV3011DQ-00A - 1X, 1.5X, 2X CHARGE PUMP 2 WHITE LED DRIVER EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1--Top Silk Layer Figure 2--Top Layer Figure 3--Bottom Layer QUICK START GUIDE 1. Solder LED1 - LED2 to the board. 2. Attach the positive and negatives terminals of the power supply (2.5V - 5.5V) to the VIN and GND pins, respectively. 3. Drive EN high to enable the MP3011. Leave EN disconnected to disable the MP3011. 4. To use burst mode brightness control, drive EN with a PWM signal. 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. EV3011DQ-00A Rev. 1.1 10/27/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved. 3 |
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