EV3307-J-00A Non-Synchronized White LED Driver Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The MP3307 is a non-synchronous WLED stepup LED driver with 2.7V-to-5.5V input range. It uses peak-current mode to regulate the LED current sensed through an external, low-side resistor. • • • The MP3307 features up to 2.2MHz programmable switching frequency which is easy to avoid the noise interference and easy to optimize efficiency and reduce the output filter components size. To extend the dimming range, it supports both analog and PWM dimming mode with separate input. MP3307 has LED open protection, output overvoltage protection, cycle-by-cycle current limit protection, and thermal shutdown protection. MP3307 is available in TSOT23-8 package which is good to use in Video displays. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage VIN 2.7 – 5.5 V Output Voltage VLED <24 V 1 string 40 mA LED String LED Current ILED • • • • • • 2.7V-to-5.5V Input Voltage Analog Dimming with >20kHz input signal Direct PWM dimming mode with 100Hz to 2kHz input signal Up to 2.2MHz Programmable Switching Frequency Low 200mV Feedback Voltage with ±1% Accuracy at Room Temperature 24V Open-Load Protection Threshold UVLO, Thermal Shutdown Cycle by Cycle Over Current Protection Available in a TSOT23-8 Package APPLICATIONS • • • Video Displays In-Car LCD Infotainment Tablets 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. EV3307-J-00A Rev.1.0 www.MonolithicPower.com 7/13/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 1 EV3307-J-00A-NON-SYNCHRONIZED WHITE LED DRIVER EV3307-J-00A EVALUATION BOARD (L x W x H) 5cm x 4.6cm x 1.0cm Board Number MPS IC Number EV3307-J-00A MP3307J EVALUATION BOARD SCHEMATIC D1 L1 VIN 3.3uH/2.55A 1 1 B0540 2 1 LED+ 2 1 1 C1 R2 2 0 C2 C3 1 GND 2 0 R1 2 4.7uF/10V 8 1 1 4.7uF/50V 1 NC R3 LEDSW 7 GND ADIM VIN PWMH 1 R11 OVP NC 2 GND 2K 6 1 5 R4 EN/PWML FREQ R5 FB 0 GND 4 100K 3 EN/PWM R8 GND 2K R10 R7 NC * MP3307 R9 51K 1 R6 4.99 GND GND GND 100K GND EV3307-J-00A Rev.1.0 www.MonolithicPower.com 7/13/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 2 EV3307-J-00A-NON-SYNCHRONIZED WHITE LED DRIVER EV3307-J-00A BILL OF MATERIALS Qty Ref Value 1 C1 4.7μF/10V 1 C2 NC 1 C3 4.7μF/50V 1 1 3 2 D1 L1 R1,R2,R5 R3,R8 B0540W 3.3μH/2.55A 0 2k 2 R4,R10 1 Description Ceramic Capacitor;X5R;0805; Package Manufacturer Manufactuer_P/N CAP/0805 TDK C2012X5R1A475K CAP/0603 Ceramic Capacitor;X7R;1210 Schottky Diode;40V;0.5A; Inductor;3.3μH;30m;2.55A 'Film Resistor;5% 'Film Resistor;1% CAP/1210 TDK C3225X7R1H475K SOD123 SMD RES/0603 RES/0603 Diodes Wurth Yageo Yageo 100k 'Film Resistor;1% RES/0603 Yageo R6 4.99 Resistor;1%;1/8W; RES/0805 Yageo 1 R9 51k 'Film Resistor;1% RES/0603 SYNTONTECH B0540W 7440700033 RC0603FR-070RL RC0603FR-072KL RC0603FR07100KL RC0603FR074R99L RC0805FR0710RL 2 R7,R11 NC 1 MP3307 6 ADIM, EN/PWM, GND, LED+, LED-, VIN TP RES/0603 TSOT238 TP MPS 弯排 EV3307-J-00A Rev.1.0 www.MonolithicPower.com 7/13/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 3 EV3307-J-00A-NON-SYNCHRONIZED WHITE LED DRIVER EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 3.6V, 3s*4p LEDs, L = 3.3µH, fs=2.2MHz, TA = 25°C VSW 5V/div. VOUT 5V/div. VSW 5V/div. VSW 5V/div. VOUT 2V/div. IL 200mA/div. ILED 100mA/div. VOUT 2V/div. IL 200mA/div. ILED 100mA/div. IL 200mA/div. ILED 100mA/div. VSW 5V/div. VSW 5V/div. VSW 5V/div. VEN 5V/div. VEN 5V/div. VEN 5V/div. IL 200mA/div. ILED 100mA/div. IL 200mA/div. ILED 100mA/div. IL 200mA/div. ILED 100mA/div. VSW 10V/div. VSW 10V/div. VOUT 20V/div. IL 2A/div. ILED 100mA/div. VOUT 10V/div. IL 2A/div. ILED 100mA/div. VSW 10V/div. VOUT 5V/div. IL 500mA/div. ILED 100mA/div. EV3307-J-00A Rev.1.0 www.MonolithicPower.com 7/13/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 4 EV3307-J-00A-NON-SYNCHRONIZED WHITE LED DRIVER PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer Figure 2—Bottom Layer EV3307-J-00A Rev.1.0 www.MonolithicPower.com 7/13/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 5 EV3307-J-00A-NON-SYNCHRONIZED WHITE LED DRIVER QUICK START GUIDE 1. Connect the positive and negative terminals of the load panel to the LED+ and LED- pins on the EV board, respectively. 2. Connect the positive and negative terminals of the power supply (2.7V ~ 5.5V) to the VIN and GND pins on the EV board, respectively. 3. Drive EN/PWML pin high (5V) to enable the chip. Apply 200Hz~2kHz PWM signal to EN/PWML for PWM dimming. 4. Drive PWMH pin with >20kHz pulse signal for PWM input analog dimming. If PWM input analog dimming is reserved, apply PWMH pin high (5V) to set up Chip. 5. Set current by R4 and R7. 6. If you set R2 as 0, OVP point is settled as 24V by internal resistor divider. 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. EV3307-J-00A Rev.1.0 www.MonolithicPower.com 7/13/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 6