EV46885DN-00A MPS | Alldatasheet

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80V INPUT 0.5A HIGH POWER LED DRIVER EV46885DN-00A Rev.1.0 www.MonolithicPower.com 1 12/18/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. The Future of Analog IC Technology

DESCRIPTION

The EV46885DN-00A is an evaluation board for high power LED driver. It is implemented by MP46885DN, an integrated Buck white LED driver which is suitable for automotive, industry and general lighting applications with MPS patented pending technology. The EV46885DN-00A is recommended to drive a single-string LEDs. It can drive up to 19 LEDs in one string. It regulates the LED current at about 350mA. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage VIN 4.5 to 80 V Enable/Dimming EN/DIM 5 V LED Current I LED 350 mA Over Current Protection OCP 0.8 A

FEATURES

  • Wide 4.5V to 80V Operating Input Range
  • No Output Capacitor Required
  • ±5% LED Current Accuracy
  • Hysteretic Control: No Compensation
  • Up to 2MHz Switching Frequency
  • Up to 20kHz Dimming Frequency
  • Dedicated PWM Dimming Control Input
  • Short circuit protection with integrated high side MOSFET
  • Optional Output Voltage Limitation
  • Thermal shut down
  • 200mV reference voltage for high efficiency
  • Up to 95% Efficiency
  • 120 μA Quiescent Current
  • Available in SOIC8 with Exposed Pad Packages

APPLICATIONS

  • High Power LED Driver
  • Automotive, Industry and General Lighting
  • Constant Current Source “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV46885DN-00A EVALUATION BOARD Components area: 0.66” x 1.17” (1.7cm x 3cm) Board Number MPS IC Number EV46885DN-00A MP46885

EV46885DN-00A (MP46885) 80V INPUT 0.5A HIGH POWER LED DRIVER EV46885DN-00A Rev.1.0 www.MonolithicPower.com 2 12/18/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC EV46885DN-00A BILL OF MATERIALS Qty RefDes Value Description Package Manufacturer Manufacturer P/N 2 C1,C2 2.2 μF Ceramic Cap., 100V, 10%, X7R 1210 muRata GRM32ER72A225K 1 C3 0.1 μF Ceramic Cap., 100V, 10%, X7R 0805 muRata GCM21BR72A104K 2 C4 0.1 μF Ceramic Cap., 50V, 10%, X7R 0603 muRata GRM188R71H104K

0 C5,C7 NS 0603

1 D1 1A Schottky Rect., 100V, 1A SMB STMicroelectronics STPS1H100U

1 L1 47 μH Inductor, Rdc 344mΩ,

Isat 3.1A SMD Cooper HC8LP-470-R 2 R1 560m Ω Film Res., 1/8W, 1% 0805 Panasonic ERJ-6RQFR56V

0 R2 NS 0805

0 R3 0603

1 R4 0 Ω Film Res., 5% 0603 Yageo RC0603JR-070RL

1 U1 Power Led Driver SO8E MPS MP46885DN

1 EN,DIM,GND 4 Pin Header, 2.54mm 2.54mm Sullins PCC04SAAN

EV46885DN-00A (MP46885) 80V INPUT 0.5A HIGH POWER LED DRIVER 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 w hen integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV46885DN-00A Rev 1.0 www.MonolithicPower.com 3 12/18/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer Figure 2—Bottom Layer QUICK START GUIDE 1. Check the LED string voltage and preset the power supplies’ Voltage for input. For example, 10 LEDs have about 32V forward voltage drop. So the power supply should be set higher than 32V, say set it to 60V. Set a second power supply to 5V for enable signal. Setup a signal generator to generate PWM signal with 5V amplitude, 20kHz frequency and 50% duty cycle. 2. Turn-off all power supplies. 3. Connect the LED+ to the anode of the string and LED- to the cathode of the string. Connect the VIN to the first power supply (60V). Connect the EN to the 5V power supply. Connect the DIM to signal generator. 4. Turn on the high voltage power supply (60V). 5. Turn on the signal generator. 6. Turn on the 5V power supply. Note: If do not need dimming function, place a 0Ω resistor at R3, which will connect DIM to EN.