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EV3309A-Q-00A 2.7V-5.5V Input, 35V Output, programmable Fsw, White LED Driver with I2C Interface Evaluation Board EV3309A-Q-00A Rev.1.0 www.MonolithicPower.com 1 3/9/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. The Future of Analog IC Technology

DESCRIPTION

The MP3309A is a WLED step-up converter for 2.7V-to-5.5V input that uses peak-current mode to regulate the LED current sensed through an external low-side resistor. The 200mV feedback voltage and synchronous rectification reduces power loss and reduces PCB space requirements. To connect an external Schottky accomplishes the non-synchronous mode for heavy load to improve the thermal performance. The MP3309A features a programmable switching frequency to optimize efficiency. It supports both analog and PWM dimming. In addition, the MP3309A has LED open protection, cycle-by-cycle current limit protection and thermal shutdown protection. The I 2C interface can set the over-voltage protection threshold, analog dimming and read IC status. MP3309A is available in QFN10 3*3mm package. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage V IN 2.7-5.5 V Output Voltage VLED <35 V LED Current I LED 40 mA

FEATURES

 2.7V-to-5.5V Input Voltage  Low 200mV Feedback Voltage with ±1% Accuracy  Selectable Synchronous or Non- synchronous Mode Thru I2C  400kHz I 2C-Compatible Interface  Analog and PWM Dimming  Programmable Switching Frequency  Programmable Over Voltage Protection Point  Software- or Hardware-Enable Function  UVLO, Thermal Shutdown  Available in 3×3mm QFN 10 package

APPLICATIONS

 Feature Phones and Smart Phones  Tablets  Video Displays All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS gree n status, please visit MPS website under Qualit y Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc.

EV3309A-Q-00A SYNCHRONOUS- WHITE LED DRIVER EV3309A-Q-00A Rev.1.0 www.MonolithicPower.com 2 3/9/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EV3309A-Q-00A EVALUATION BOARD (L x W x H) 5cm x 4.6cm x 1.0cm Board Number MPS IC Number EV3309A-Q-00A MP3309AGQ EVALUATION BOARD SCHEMATIC 0R110nF C210uF21 NC

1 LED-

1 LED+

4.99 1 2 10uH/1AL1 1GND 1uF EN VIN 2.7V~5.5V 200k R510k NC SDA SCL NC NC

8 LED in series, 40mA

EV3309A-Q-00A SYNCHRONOUS- WHITE LED DRIVER EV3309A-Q-00A Rev.1.0 www.MonolithicPower.com 3 3/9/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EV3309A-Q-00A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Part Number

1 C1 10uF Ceramic Capacitor,

6.3V, X7R 0805 muRata GCM21BR70J106KE2

1 C2 10nF Ceramic Capacitor,

50V, X7R 0603 muRata GRM188R71H103KA01D

1 C3 1uF Ceramic Capacitor,

50V, X7R 1206 muRata GRM31MR71H105KA88L

1 C4 1uF Ceramic Capacitor,

6.3V, X5R 0603 muRata GRM188R60T105KA01D

1 D1 NC

1 L1 10uH Inductor, 1.14A, DCR=59mOhm SMD TOKO D63LCB-A921CY- 100M=P3

2 R1,R6 0Ohm Resister, 0Ohm,

5% 0603 Yageo RC0603JR-070RL

1 R10 10Ohm Resister, 10Ohm,

1% 0603 Yageo RC0603FR-0710RL

3 R2, R3,

2 R5,R7 200kOhm Resister,

200kOhm, 1% 0603 Yageo RC0603FR-07200KL

1 R4 10kOhm Resister, 10kOhm,

1% 0603 Yageo RC0603FR-0710KL 1 R8 4.99Ohm Resister, 4.99Ohm, 1% 0603 Yageo RC0603FR-074R99L

1 U1 MP3309AGQ QFN10(3*3) MPS

EV3309A-Q-00A SYNCHRONOUS- WHITE LED DRIVER EV3309A-Q-00A Rev.1.0 www.MonolithicPower.com 4 3/9/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 3.6V, 8 LEDs in series, ILED=40mA, L = 10µH, TA = 25ºC, unless otherwise noted.

EV3309A-Q-00A SYNCHRONOUS- WHITE LED DRIVER NOTICE: The information in this document is subject to change wi thout notice. Please contact M PS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights ar e not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV3309A-Q-00A Rev.1.0 www.MonolithicPower.com 6 3/9/2015 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. QUICK START GUIDE 1. Provide a voltage source ranges from 2.7-5.5V between VIN terminal and GND. 2. Connect LED strings between LED+ and LED-. 3. Dimming Mode Analog Dimming: Firstly pull EN/PWML pin to logical high, then connect SCL/PWMH and SDA/PWMH pin together and add >20kHz PWM signal. PWM Dimming: Firstly connect SCL/PWMH and SDA/PWMH together and pull to logical high, then add 200-2kHz PWM signal to EN/PWML pin. 4. According output current select feedback resister at FB pin(resister-current calculation equation as datasheet ).