EV2483DQ-00C 2.5A, 55V, Programmable Frequency White LED Driver Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The MP2483 is a 55V, 2.5A, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 2.5A 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 MP2483 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 MP2483 requires a minimum number of readily available standard external components and is available in 10-pin 3mm x 3mm QFN packages. MP2483DQ DEMO BOARDS Board number Operating Mode Input (V) LED# ILED (mA) EV2483DQ-00A Buck 15~50 3 700 EV2483DQ-00B Buck-boost 12 3~5 500 EV2483DQ-00C Boost 12 6~9 500 ELECTRICAL SPECIFICATIONS Parameter Input Voltage Symbol Value Units VIN 12 V LEDs # LED Current • • • • • • • • • • • • • • 2.5A 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 3x3 QFN Package APPLICATIONS • • • • • • General LED Illuminations LCD Backlight Panels Handheld Computers Automotive Internal Lighting Portable Multimedia Players Portable GPS Devices 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. 6~9 ILED 500 mA EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER EV2483DQ-00C EVALUATION BOARD (L x W x H) 5cm x 4.5cm x 0.7cm Board Number MPS IC Number EV2483DQ-00C MP2483DQ EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER EVALUATION BOARD SCHEMATIC EV2483DQ-00C BILL OF MATERIALS Qty Ref Value 1 C1 1μF 1 1 1 1 C2, C3 C4, C5 C6 C7 D1 D2 1 L1 2 2 1 1 1 R4 R1, R5 R2, R10 R3 R6, R8 R7 R9 1 U1 2 2 1 2 Description Package Manufacturer Ceramic Capacitor,100V,X7R 1210 Murata 2.2μF Ceramic Capacitor,100V,X7R 1210 Murata 1n Ceramic Capacitor,50V,X7R 0603 TDK C1608X7R1H102K 100n NC B360 NC Ceramic Capacitor,50V,X7R 0603 1210 SMA SMA TDK C1608X7R1H104K 10μH Inductor 3.7A,22mOhm SM TOKO 10μH 10μH 1k Inductor 3.8A, 35mOhm inductor 3.8A, 28mOhm resistor, 1% SM SM 0603 Cooper TDK Yageo DH124C-1010ASW100M DR1040-100-R VLF10040-100M3R8 RC0603JR-071kL 0 resistor, 1% 0603 Yageo RC0603JR-070RL 10kΩ resistor, 1% 0603 Yageo RC0603FR-0710kL 75kΩ resistor, 1% 0603 Yageo RC0603FR-0775kL 0805 0603 ROYALOHM Yageo 0805F400LT5E RC0603FR-07180kL QFN3*3 MPS Diode Schottky NC 400m 180kΩ MP24 83DQ Diodes Inc. Manufacturer P/N GRM32ER72A105KA0 1L GRM32ER72A225KA3 5L B360A 0805 resistor, 1% resistor, 1% MPS WLED Driver, 2.5A, 55V, frequency programmable MP2483DQ EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 3 EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer Figure 2—Bottom Layer EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 4 EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER QUICK START GUIDE 1. Connect the load (6~9LEDs) to the output. The Anode of the load to “LED+_Boost” 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. EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 5