AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver General Description This demonstration board utilizes the AL1676 Buck LED driver-converter with single winding inductor providing a cost effective non-dimmable solution for offline high brightness LED applications. This userfriendly evaluation board provides users with quick connection to their different types of LEDs string. The demonstration board can be modified to adjust the LED output current and the number of series connected LEDs that are driven. A BOM, schematic and layout are included that describes the parts used on this demonstration board, along with measured performance characteristics. These materials can be used as a reference design. Specifications Parameter AC Input Voltage Output Power LED Current LED Voltage Power Factor Efficiency XYZ Dimension ROHS Compliance Value 100-265V 8.6W 120mA 72V >0.97(Vin=120VAC ) >0.92(Vin=230VAC) >88% 45x 24 x 13mm Yes Evaluation Board Key Features Non-Dimmable Single winding inductor High efficiency >88% Non-isolate buck LED driver Figure 1: Top View Applications Retrofit LED Lamps High Voltage DC-DC LED Driver General Purpose Constant Current Source AL1676EV1.Rev1 Nov 2015 www.diodes.com Figure 2: Bottom View Connection Instructions: AC-L Input: White – Hot AC-N Input: White – Neutral DC LED+ Output: LED+ (Red) DC LED- Output: LED- (Black) Page 1 of 10 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Board Layouts Figure 3: PCB Layout Top View Figure 4: PCB Layout Bottom View Quick Start Guide 1. 2. 3. 4. 5. 6. Preset the isolated AC source to 120VAC/230VAC. Ensure that the AC source is switched OFF or disconnected. Connect the anode wire of the LED string to the LED+ terminal of the evaluation board. Connect the cathode wire of the LED string to the LED- terminal of the evaluation board. Connect two AC line wires to the AC-L and AC-N terminals on the evaluation board. Ensure that the area around the board is clear and safe, and preferably that the board and LEDs are enclosed in a transparent safety cover. 7. Turn on the main switch. LED string should light up with LED. DO NOT TOUCH THE BOARD, LEDs OR BARE WIRING. Caution: The AL1676 is a non-isolated design. All terminals carry high voltage during operation! AL1676EV1.Rev1 Nov 2015 www.diodes.com Page 2 of 10 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Schematic Figure 5: Schematic Circuit Transformer Design Bobbin and Core EE10 Vertical 4+4 pin Transformer Parameters 1. Primary Inductance (Pin2-Pin5, all other windings open)：Lp=1.67mH, ±5%@1kHz 2. Primary Winding Turns (Pin2-Pin5): NP=257Ts Transformer Winding Construction Diagram 2 WD1: Primary 0.15mm*1, 257Ts 5 Item Winding name Description 1 WD1-Primary Winding Start at Pin 2, Wind 257turns of Φ0.15mm wire and finish on Pin 5 2 Insulation 2 Layers of insulation tape AL1676EV1.Rev1 Nov 2015 www.diodes.com Page 3 of 9 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Bill of Material No. Item 1 C1 2 Description Package QTY 68nF/400V, CL21, Pitch=7.5mm DIP 1 C2 150nF/400V, CL21, Pitch=7.5mm DIP 1 3 C3 Ceramic Cap, 0.33uF/25V,X7R 0805 1 4 C4 Ceramic Cap, 1uF/25V,X7R 0805 1 5 C5 E-Cap, 130℃,100uF/100V,10*16mm DIP 1 6 C6 NC - 0 7 BD1 SOPA-4 1 8 D1 Fast Recovery Diode, RS1J, 1A/600V,Diodes Inc SMA 1 9 VR1 Varistor, 07D431 DIP 1 10 RF1 Fuse Resistor,10R, 5%, 1W DIP 1 11 R1 SMD Resistor,30K, 5%, 1/8W 0805 1 12 R2 SMD Resistor,180K, 5%, 1/4W 1206 1 13 R3 SMD Resistor,180K, 5%, 1/4W 1206 1 14 R4 SMD Resistor,3.0R, 1%, 1/8W 0805 1 15 R5 SMD Resistor,3.6R, 1%, 1/8W 0805 1 16 R6 SMD Resistor,47K, 5%, 1/8W 0805 1 17 R8 SMD Resistor,100K, 5%, 1/4W 1206 1 18 L1 Inductor 4.7mH, 6*8mm DIP 1 19 T1 EE10, Vertical, 4+4 pin,Single Winding,1.67mH DIP 1 20 U1 AL1676-10B, high PFC Buck IC, Diodes Inc SOIC-7 1 21 PCB Rectifier Bridge,HD06,0.8A/600V,Diodes Inc FR4 Single layer, 45*24mm Total AL1676EV1.Rev1 Nov 2015 www.diodes.com 19 Page 4 of 9 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Electrical Performance Efficiency vs Input Voltage ILED vs Input Voltage 92.0 124 91.5 123 91.0 122 90.5 121 89.5 120 89.0 119 88.5 118 ILED(mA) Efficiency(%) 90.0 88.0 87.5 87.0 86.5 117 116 115 86.0 114 85.5 113 85.0 112 84.5 111 84.0 100 120 140 160 180 200 220 240 110 260 100 120 140 160 180 200 220 240 260 Input Voltage(V) Input Voltage(V) PF vs Input Voltage THD vs Input Voltage 1.00 39 0.99 36 0.98 0.97 33 0.96 30 0.95 0.94 THD(%) 27 PF 0.93 0.92 0.91 0.90 24 21 0.89 18 0.88 15 0.87 12 0.86 0.85 100 120 140 160 180 200 Input Voltage(V) AL1676EV1.Rev1 Nov 2015 www.diodes.com 220 240 260 9 100 120 140 160 180 200 220 240 Input Voltage(V) Page 5 of 9 260 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Functional Waveform LED Current Ripple (Vin=230VAC, Ripple=58mA) IC VDRAIN Waveform (Vin=265VAC, VDRAIN_MAX=400V) LED Open Protection (Vin=230VAC, Y-VCC, R-Drain, B-Vout,G-ILED) AL1676EV1.Rev1 Nov 2015 www.diodes.com Start-up Time (Vin=100VAC, Start-up time=481mS) Output Diode VR Waveform (Vin=265VAC, VR_MAX=393V) LED Short Protection (Vin=230VAC,Y-VCC, R-Drain, B-Vout) Page 6 of 9 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Thermal Test Top (Vin=230VAC,Burn-in time=30min) Bottom (Vin=230VAC, Burn-in time=30min) EMI Conduction Test Line Terminal (Vin=120VAC,Margin>14dB) AL1676EV1.Rev1 Nov 2015 www.diodes.com Neutral Terminal (Vin=120VAC,Margin>14dB) Page 7 of 10 AL1676EV1 User Guide 100~265VAC Non-dimmable LED Driver Line Terminal (Vin=230VAC,Margin>10dB) AL1676EV1.Rev1 Nov 2015 www.diodes.com Neutral Terminal (Vin=230VAC,Margin>10dB) Page 8 of 9 AL1676EV1 User Guide 100~265VAC Non-dimmable 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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