EV24183DQ-00B 1A, 55V, Programmable Frequency White LED Driver Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The MP24183 is a 55V, 1A, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 1A peak output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes thermal shutdown, cycle-by-cycle peak current limiting, input over voltage protection, open strings protection and output short circuit protection. • • The MP24183 incorporates both DC and PWM dimming onto a single control pin. The separate input reference ground pin allows for direct enable and/or dimming control for a positive to negative power conversion. The MP24183 requires a minimum number of readily available standard external components and is available in 10-pin 3mm x 3mm QFN packages. MP24183DQ DEMO BOARDS Board number Operating Input LED Mode (V) # ILED (mA) EV24183DQ-00A Buck 15~50 3 700 EV24183DQ-00B Buckboost 12 3~5 500 EV24183DQ-00C Boost 12 6~9 500 • • • • • • • • • • • • • • 1A Maximum Output Current Unique Step-up/down Operation (BuckBoost Mode) Wide 4.5V to 55V Operating Input Range for Step-Down Applications (Buck Mode) 0.28Ω Internal Power MOSFET Switch Adjustable Switching Frequency Analog and PWM Dimming 0.198V Reference Voltage 5μA Shutdown Mode No minimum LED required Stable with Low ESR Output Ceramic Capacitors Cycle-by-Cycle Over Current Protection Thermal Shutdown Protection Open Strings Protection Input Over Voltage Protection Output Short Circuit Protection Available in 10-Pin 3x3mm QFN Package APPLICATIONS • • • • • • General LED Illuminations LCD Backlight Panels Handheld Computers Automotive Internal Lighting Portable Multimedia Players Portable GPS Devices All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. EV24183DQ-00B Rev.1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 EV24183DQ-00B 1A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER EV24183DQ-00B EVALUATION BOARD (L x W x H) 5cm x 4.5cm x 0.7cm Board Number EV24183DQ-00B MPS IC Number MP24183DQ EV24183DQ-00B Rev.1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 EV24183DQ-00B 1A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER EVALUATION BOARD SCHEMATIC MP24183 EV24183DQ-00B BILL OF MATERIALS Qty Ref Value 1 C1 1μF 2 C2,C3 2.2μF 2 C4,C5 1n 1 C6 100n 1 C7 2.2μF 1 1 1 D1 D2 L1 1 2 2 1 2 1 1 R4 R1,R5 R2,R10 R3 R6,R8 R7 R9 B360 B160 10μH 10μH 10μH 1k 0 10kΩ 75kΩ NC 400m 180kΩ 1 U1 MP24183DQ Description Ceramic Capacitor,100V,X7R Ceramic Capacitor,100V,X7R Ceramic Capacitor,50V,X7R Ceramic Capacitor,50V,X7R Ceramic Capacitor,50V,X7R Diode Schottky Diode Schottky Inductor 3.7A,22mΩ Inductor 3.8A, 35mΩ inductor 3.8A, 28mΩ resistor, 1% resistor, 1% resistor, 1% resistor, 1% resistor, 1% resistor, 1% MPS WLED Driver, 1A, 55V, frequency programmable Package Manufacturer Manufacturer P/N 1210 Murata GRM32ER72A105KA01L 1210 Murata GRM32ER72A225KA35L 0603 TDK C1608X7R1H102K 0603 TDK C1608X7R1H104K 1210 TDK C3225X7R1H225K SMA SMA SM SM SM 0603 0603 0603 0603 0805 0805 0603 Diodes Inc. Diodes Inc. TOKO Cooper TDK Yageo Yageo Yageo Yageo ROYALOHM Yageo QFN3*3 MPS B360A B160A DH124C-1010ASW-100M DR1040-100-R VLF10040-100M3R8 RC0603JR-071kL RC0603JR-070RL RC0603FR-0710kL RC0603FR-0775kL 0805F400LT5E RC0603FR-07180kL MP24183DQ EV24183DQ-00B Rev.1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 3 EV24183DQ-00B 1A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer Figure 2—Bottom Layer EV24183DQ-00B Rev.1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 4 EV24183DQ-00B 1A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER QUICK START GUIDE 1. Connect the load (3~5LEDs) to the output. The Anode of the load to “LED+” and the Cathode of the load to “LED -”. 2. Connect the input voltage source to the input VIN and INGND. The input voltage source should be initialed 12V. 3. Connect the EN or dimming signal to EN/Dim pin. For PWM dimming, connect the PWM signal to EN/Dim pin, the high level should be higher than 1.4V, the low level should be lower than 0.7V. For analog dimming, connect a DC dimming signal in range of 0.7V~1.4V to EN/Dim pin. 4. Power up the input voltage source, and then power up the EN/Dim signal, the LEDs should be ignited NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. 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. EV24183DQ-00B Rev.1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 5