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| TM EV1519DQL-00A 1x, 1.5x, 2x High Efficiency Charge Pump 3 White LED Driver Evaluation Board The Future of Analog IC Technology TM DESCRIPTION The EV1519DQL-00A is an evaluation board for the MP1519, a fully automatic driver for powering three 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 3 2.5 - 5.5 20 Units V mA APPLICATIONS "MPS" and "The Future of Analog IC Technology" are Trademarks of Monolithic Power Systems, Inc. EV1519DQL-00A EVALUATION BOARD Efficiency vs Supply Voltage 100 90 80 70 60 50 40 30 20 10 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) 4.5 ILED=10mA VLED = 3.23V @ 20mA ILED=5mA ILED=20mA Dimensions (2.3"X x 1.8"Y x 0.4"Z) Board Number EV1519DQL-00A MPS IC Number MP1519DQL EFFICIENCY (%) MP1519L_EC01 EV1519DQL-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 EV1519DQL-00A - 1X, 1.5X, 2X CHARGE PUMP 3 WHITE LED DRIVER EV BOARD EVALUATION BOARD SCHEMATIC TP1 LED3 LED2 LED1 VIN U1 16 LED3 15 LED2 14 LED1 13 BATT 1 2 NC NC EN RADJ 12 11 10 9 GND 3 4 MP1519DQL GND C1A BATT C2A C1B GND C2B 5 6 7 EN Note: Connect the exposed pad to the LEDC pin. EV1519DQL_S01 EV1519DQL-00A BILL OF MATERIALS Qty 2 2 3 1 1 3 1 Ref C1, C2 C3, C4 LED1, LED2, LED3 R1 R2 R3, R4, R5 U1 Value Description 1F Ceramic Cap., 10V, X7R 4.7F Ceramic Cap., 6.3V, X5R Not Stuffed 1.54k Resistor, 1% 100k Resistor, 5% 0 Resistor, 5% MP1519DQL 0805 0805 0805 QFN16 (3x3) Panasonic Panasonic Yageo MPS ERJ-6ENF1541V ERJ-6GEYJ104V 9C08052A0R00JLHFT MP1519DQL Package 0805 0805 Manufacturer TDK TDK Manufacturer P/N C2012X7R1A105K C2012X5R0J475K EV1519DQL-00A Rev. 1.1 10/27/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2005 MPS. All Rights Reserved. LEDC 8 2 TM EV1519DQL-00A - 1X, 1.5X, 2X CHARGE PUMP 3 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 - LED3 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 MP1519DQL. Leave EN disconnected to disable the MP1519DQL. 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. EV1519DQL-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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