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1.3A Fixed Frequency White LED Driver Evaluation Board EV3302-J-01A Rev. 1.0 www.MonolithicPower.com 1 9/8/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. The Future of Analog IC Technology

DESCRIPTION

The EV3302-J-01A is an evaluation board for the MP3302, a step-up converter designed for driving up to 27 white LEDs from a single cell lithium Ion battery. The EV board parameters are optimized for the load of 3 white LEDs in series, 9 strings paralleled. The MP3302 uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 195mV feedback voltage reduces power loss and improves efficiency. The MP3302 monitors the output voltage and turns off the converter if an over- voltage condition occurs due to an open circuit condition. The MP3302 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The MP3302 is available in small 5-pin TSOT23 package. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage V IN 3.3 – 6 V Number of LEDs 27

FEATURES

 3.3V to 6V Input Voltage Range  Drives up to 27 White LEDs  Up to 87% Efficiency  Open Load Shutdown  Fully Assembled and Tested

APPLICATIONS

 Cell Phones  Handheld Computers and PDAs  Digital Still Cameras  Small LCD Displays All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV3302-J-01A EVALUATION BOARD (L x W x H) 4.6cm x 4.6cm x 1.0cm Board Number MPS IC Number EV3302-J-01A MP3302DJ 95% 90% 85% 80% 75% 70% EFFICIENCY (%) 3456 INPUT VOLTAGE(V) Efficiency vs VIN

EV3302-J-01A – 1.3A FIXED FREQUENCY WHITE LED DRIVER EV3302-J-01A Rev. 1.0 www.MonolithicPower.com 2 9/8/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC PGND PGND PGND PGND 1EN 1VIN 1 2 1uF 2 1 JP1 1.10 1A/60V PGND 1GND 1Bias 3.3V-6V input voltage 1 2 4.7uF/16V 1 2 4.7uF/16V NS LED+ 1 2 30R3 1 2 0.47uF/50V 4.7uH/1.1A 1 2 LED- GND2 FB 3 SW 1 EN4 IN 5 M3302 80000TEN00000TEN NET00015 NET00016 NET00017 NET00018 NET00019 EV3302-J-01A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Part Number 2 C1,C2 4.7µF Ceramic Capacitor, 16V, X5R 0805 Murata GRM21BR61C475KA88

1 C3 1µF Ceramic Capacitor, 16V, X7R 0603 TDK C1608X7R1C105K

1 C4 0.47µF Ceramic Capacitor, 50V, X7R 0805 Murata GRM21BR71H474KA88

1 D1 Diode Schottky, 60V, 1A SMA Diodes Inc B160

1 L1 4.7µH Inductor,1.1A SMD Cooper SD10-4R7-R 1 R1 1.10 Ω Resistor, 1% 0805 Yageo R0805FR-071R1L

1 R2 NS Not Stuffed

2 R3,R4 30 Ω Resistor,1% 0603 Yageo RC0603FR-0730RL

1 U1 White Led Driver TSOT23-5 MPS MP3302DJ

1 CN1 Connector JST SM02B-BHSS-1-TB

EV3302-J-01A – 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. EV3302-J-01A Rev. 1.0 www.MonolithicPower.com 4 9/8/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. QUICK START GUIDE 1. Connect the positive and negative terminals of the load panel (3 white LEDs in series, 9 stings paralleled) to the LED+ and LED- pins on the EV board, respectively. 2. Connect the positive and negative terminals of the power supply (3.3V ~ 6V) to the VIN and GND pins on the EV board, respectively. 3. Drive EN pin high (1.5V < Ven < Vin) to enable the MP3302. 4. Apply a DC voltage of 0.7V to 1.4V on EN pin for analog dimming. Maximum brightness (180mA typical) occurs with 1.4V voltage or above applied. 5. For PWM dimming mode, apply a PWM rectangular waveform with a minimum voltage less than 0.5V and a maximum greater than 1.5V on EN pin. The frequency of the PWM signal is recommended between 100Hz to 1kHz.