EV3310EQ-00A 1.3A Step-up White LED Driver Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV3310EQ-00A is an evaluation board for the MP3310, a monolithic step-up converter designed for driving arrays of WLEDs from a wide input supply range. The EV board is optimized for the load of 10 white LEDs in series, 4 strings panel. • • • • • • • The MP3310 uses current mode, fixed frequency architecture to regulate the LED current to user programmed value set by an external current setting resistor. The switching frequency is also programmable with an external resistor. The MP3310 features true PWM dimming, which allows the flexible control of the backlighting luminance under wide range of the ambient brightness. The MP3310 is turned off if an over-voltage condition is present due to an open circuit condition. Use one external resistor voltage divider to program OVP threshold. And it also includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The MP3310 is available in small 10-pin QFN 3x3mm package. Wide 5V to 25V Operating Input Range Drives up to 12 Series White LEDs Up to 93% Efficiency True PWM Dimming Adjustable Switching Frequency Adjustable Open Load Shutdown Voltage Fully Assembled and Tested APPLICATIONS • • • • • LCD Panels Digital Picture Frames Handheld Computers and PDAs Digital Still Cameras Small LCD Displays ELECTRICAL SPECIFICATIONS Parameter Input Voltage Symbol Value Units VIN 5~25 40(10 in series, 4 strings paralleled) 80 V # of WLEDs LED Current ILED mA “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV3310EQ-00A EVALUATION BOARD VIN vs. Efficiency 100 EFFICIENCY (%) 95 (L x W x H) 2.0” x 1.8” x 0.4” 5.0cm x 4.6cm x 1.0cm Board Number MPS IC Number EV3310EQ-00A MP3310EQ EV3310EQ-00A Rev. 1.0 1/6/2010 90 85 80 75 70 4 8 12 16 20 24 VIN(V) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 EV3310EQ-00A – 1.3A STEP-UP WHITE LED DRIVER EVALUATION BOARD EVALUATION BOARD SCHEMATIC EV3310EQ-00A BILL OF MATERIALS Qty Ref Value 2 C1, C2 4.7µF 1 C3 1µF 1 C4 1µF 1 C5 NC 1 C6 0.1µF 1 1 1 1 1 1 2 D1 L1 R1 R2 R3 R4 R5, R6 B160 22µH 330kΩ 10kΩ 0Ω 51kΩ Open 1 R7 57.6kΩ 1 U1 Description Ceramic Capacitor,50V,X7R Ceramic Capacitor,50V,X7R Ceramic Capacitor,16V,X7R Ceramic Capacitor,16V,X7R Diode Schottky Inductor 1.34A 1% 1% 5% 5% 1% MP3310EQ MPS WLED Driver EV3310EQ-00A Rev. 1.0 1/6/2010 Package Manufacturer Part Number 1210 muRata 1206 TDK 0603 muRata GRM188R71C105KA12D 0603 muRata GRM188R71C104KA01D SMA D63LCB 0603 0603 0603 0603 Diodes Inc. TOKO Any Any Any Any 0603 Any QFN10 (3x3mm) MPS GRM32ER71H475KA88L C3216X7R1H105K B160 #A921CY-220M=P3 MP3310EQ-LF-Z R0 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 2 EV3310EQ-00A – 1.3A STEP-UP WHITE LED DRIVER EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer EV3310EQ-00A Rev. 1.0 1/6/2010 Figure 2—Bottom Layer www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 3 EV3310EQ-00A – 1.3A STEP-UP WHITE LED DRIVER EVALUATION BOARD QUICK START GUIDE 1. Connect the positive and negative terminals of the load panel (10 white LEDs in series, 4 stings paralleled, each string have a 43ohm droop resistor) to the LED+ and LED- pins on the EV board, respectively. 2. Connect the positive and negative terminals of the power supply (5V~25V) to the VIN and GND pins on the EV board, respectively. Turn the power supply on. 3. Drive EN pin high (VEN > 2V) to enable the MP3310. 4. For PWM dimming mode, apply a PWM rectangular waveform with a minimum voltage less than 0.5V and a maximum greater than 2V on EN pin. The frequency of the PWM signal is recommended between 200Hz to 2kHz. 5. For smaller than 5.5V input applications, short J1 for a stronger drive voltage source (as compared with the internal 5V LDO). NOTICE: The information in this document is subject to change without notice. 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. EV3310EQ-00A Rev. 1.0 1/6/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4