EV3202-00A MPS | Alldatasheet
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Technical content
1.3A Fixed Frequency White LED Driver Evaluation Board EV3202-00A Rev. 1.1 www.MonolithicPower.com 1 10/18/2007 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. The Future of Analog IC Technology
DESCRIPTION
The EV3202-00A is an evaluation board for the MP3202, a step-up converter designed for driving up to 39 white LEDs (13 strings of 3 LEDs each) from a 5V system rail, or 27 white LEDs from 4.5V to 6V. The MP3202 uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 104mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over-voltage condition is present due to an open circuit condition. The MP3202 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage V IN 4.5 – 6 V Number of LEDs 27
FEATURES
- 4.5V to 6V Input Voltage Range
- Drives up to 27 White LEDs
- Up to 92% Efficiency
- Soft-Start/PWM Dimming
- Fully Assembled and Tested
APPLICATIONS
- Cell Phones
- Handheld Computers and PDAs
- Digital Still Cameras
- Small LCD Displays “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV3202-00A EVALUATION BOARD 7.8cm x 3.5cm x 1.2cm Board Number MPS IC Number EV3202-00A MP3202DG 100 EFFICIENCY (%) INPUT VOLTAGE (V) Efficiency vs Input Voltage IOUT=100mA IOUT=180mA
EV3202-00A – 1.3A FIXED FREQUENCY WHITE LED DRIVER EV3202-00A Rev. 1.1 www.MonolithicPower.com 2 10/18/2007 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC 1A / 30V MP3202 IN FB NC SW GND GND OV EN EV3202-00A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Part No. 2 C1,C2 2.2µF Ceramic Capacitor, 10V, X5R 1206 Panasonic: ECJ-3YB1A225K
2 C3, C4 1µF Ceramic Capacitor, 25V, X7R 1206 TDK:
C3216X7R1E105K/.85
1 D1 Diode Schottky, 30V, 1A, 450mW SOD-123 Diodes Inc:
1 L1 10µH Inductor, 1.2A SMD Sumida: CDRH6D12-100NC 27 LED1 to LED27 White Led, 3.6V, 40 MCD, Not Stuffed SMD Lumex: SML-LX23UWC-TR
1 R1 100k Ω Resistor, 5% 0603 Panasonic:
1 R2 1.1 Ω Resistor, 5% 0603 Panasonic: ERJ-3GEYJ1R1V 1 R3 1.2 Ω Resistor, 5% 0603 Panasonic: ERJ-3GEYJ1R2V
1 U1 Fixed Frequency Boot , White Led
Driver 2x2 QFN8 MPS: MP3202DG
1 F1 1A Fuse 1206
1 CN1 3-Pin Connector Header, 0.100 Sullins: PTC03SAAN 1 CN2 2-Pin Connector Header, 0.100 Sullins: PTC02SAAN
EV3202-00A – 1.3A FIXED FREQUENCY WHITE LED DRIVER NOTICE: The information in this document is subject to change wi thout notice. Users should warra nt and guarantee that third party Intellectual Property rights are not infringed upon w hen integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV3202-00A Rev. 1.1 www.MonolithicPower.com 4 10/18/2007 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. QUICK START GUIDE 1. Solder LED1 – LED27 to board. 2. Connect the positive and negative terminals of the power supply (4.5V to 6V) to the VIN and GND pins, respectively. 3. This board is set up for automatic startup. Pull EN low to shut down the MP3202. 4. To use burst mode brightness control, drive EN with a PWM signal.