AL9910AEV2 User Guide High Current and High Voltage LED Driver General Description This demonstration board utilizes the AL9910A high voltage PWM LED Buck controller providing a cost effective solution for offline high brightness LED applications. This user‐friendly evaluation board provides users with quick connection to their different types LEDs string. The demonstration board can be modified to adjust the LED output current (2.5A) and the number of series connected LEDs that are driven. Key Features High output current, 2.5A ~ 90% efficiency DC input voltage range up to 80V Low BOM cost PWM Dimmable AL9910A EV2 Specifications Parameter Value Input Voltage Output Power LED Current LED Voltage Efficiency Number of LEDs 40 to 80VDC 50 – 60W 2.5A (Adjustable) 25V ~90% (2) sets of 8 LEDs in parallel (Under Tested) 3.00 ” x 3.25” Yes XY Dimension ROHS Compliance Evaluation Board DC- LED+ DC+ LED- Applications Signage and decorative LED lighting High current DC‐DC LED driver High intensity lamps Street lamps Figure 1: Top View Connection Instructions Input Voltage: 40 to 80VDC (DC+, DC‐) LED Outputs: LED+ (Red), LED‐ (Black) AL9910AEV2 Rev1 August 2014 www.diodes.com Page 1 of 6 AL9910AEV2 User Guide High Current and High Voltage LED Driver Evaluation Board Schematic Figure 2: Evaluation Board Schematic Evaluation Board Layout Figure 3: PCB Board Layout Top View AL9910AEV2 Rev1 August 2014 www.diodes.com Figure 4: PCB Board Layout Bottom View Page 2 of 6 AL9910AEV2 User Guide High Current Non-Dimmable Quick Start Guide 1. By default, the evaluation board is preset at 2.5A LED Current by R25, and R26. Non‐ Dimmable by R22, remove R22 to allow PWM Dimming input. 2. Ensure that the DC source is switched OFF or disconnected. 3. Connect the DC line wires of power supply to “Vin and GND” on the left side of the board. 4. Connect the anode wire of external LED string to LEDA output test point. 5. Connect the cathode wire of external LED string to LEDK output test point. 6. Turn on the main switch. LED string should light up. Bill of Material # 1 2 Name 3 4 Q1 5 6 7 8 9 U3 D1 L1 R12,R17, R21,R22 R24 R25,R26 R16 C2,C5 C3,C4, C9,C10 10 11 C11 12 C12 Quantity 1 1 Part number 1 1 DMN10H170SK3-13 4 1 541-0.0ACT-ND AL9910ASP-13 SBR10U200P5-13 7447709101 P226KCCT-ND CSRN2512FKR300CT -ND 2 1 2 311-1.00KCRCT-ND 587-1777-1-ND 587-1404-1-ND 4 1 1 399-1159-1-ND 587-2668-1-ND Manufacturer Diodes Inc Diodes Inc Description LED Driver Diodes Inc Wurth MOSFET 100V/12A Vishay Panasonic 0Ω Resistor 1/8W 1% 0805 SMD Stackpole Yageo Taiyo 0.15Ω Resistor 2W 1% 2512 SMD Taiyo Kemet Taiyo 2.2µF Cer Cap 100V 10% X7R Super Barrier Rectifiers 100µH, 3.1A Inductor 226kΩ Resistor 1/8W 1% 0805 SMD 1KΩ Resistor 1/8W 1% 0805 SMD 1µF Cer Cap 100V 10% X7R 0.01µF Cer Cap 100V 10% X7R 10µF Cer Cap 10V 10% X7R Functional Performance Manuf Board Type VIN (VDC) IIN (A) PIN (W) VLED (V) ILED (A) PLED (W) Diodes Inc AL9910AEV2 Module Board 80 0.95 76.00 26.19 2.59 67.83 AL9910AEV2 Rev1 August 2014 www.diodes.com ILED Ripple (%) 20 Efficiency (%) 89.25 Page 3 of 6 AL9910AEV2 User Guide High Current Non-Dimmable Functional Performance Figure 1. Efficiency vs. Vin Figure 2. LED Current vs. Vin Figure 3. LED Current (%) vs. Vin AL9910AEV2 Rev1 August 2014 www.diodes.com Page 4 of 6 AL9910AEV2 User Guide High Current Non-Dimmable Waveform #1 (Gate Duty Cycle ILED=2.5A) => Channel 2: Gate Switching, Channel 3: ILED AL9910AEV2 Board (ILED=2.5A) Gate Switching Duty Cycle ~50% ILED=2.5A Condition: IN=80VDC; OUT=8 LEDs in series / 2.5A AL9910AEV2 Rev1 August 2014 www.diodes.com Page 5 of 6 AL9910AEV2 User Guide High Current and High Voltage LED Driver IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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