AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver General Description This AP1694A Triac Dimmable GU10 12V/400mA Buck LEDs driver EV board use tapped transformer to increasing power conversion turn on duty cycle, boost current back to LED during ratio of tapped winding. Also the bigger gauge wire can be used as well as the large inductance can be suitable in switching loop which can reduce the switching current and the lower forward drop so that SBR diode can be used which can reduce the power consumption on the diodes. Key Features Typical 3% to 95% Dimming performance (Depends on dimmers brands) Boundary conductive switching mode Simple adjustable Constant Current Inductor Short Protection Low BOM cost PFC >0.9 & low THD. 100 to 135VAC input range >77% Efficiency With open, short, and wrong polarity LED protection AP1694A EV10 Specifications Parameter Value Input Voltage PFC LED Current LED Voltage Efficiency Number of LEDs 100 to 135VAC > 0.9 400mA (Adjustable) 12V >77% 4 LEDs in series (Under Tested) 28.5 x 16.5 x 14.5mm Yes XYZ Dimension ROHS Compliance Evaluation Board Figure 1: Top View Applications Figure 2: Bottom View Connection Instructions GU10 LED Offline small size bulb Candle size LED lamp Desktop lamps Under the counter lamps AP1694AEV10 Rev2 July 2015 www.diodes.com Input Voltage: 120VAC (AC+, AC‐) LED Outputs: LED+ (Red), LED‐ (Black) Page 1 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver WHY USE DIODES TAPPED TRANSFORM STRUCTURE The traditional Buck converter turn on time is inverse proportion with input voltage. Vo = D x Vin. The duty cycle will be getting smaller when the input voltage goes higher. Example: Vo=12V, Vin= 120VAC, Fs= 75kHz. D= Vo/Vin * = 12V/120V * 1.414 = 0.07 Ton=D/Fs = 0.07/ 75kHz =0.933µs. T=1/Fs =13.33µs Since the Ton time is too short in the duty cycle; therefore there is not enough current passing through the LEDs and charging the inductor. In result, it caused the efficiency to be lower. In order to solve this issue ‐ use the Diodes tapped transformer to boost the output current & increase the Ton time in the duty cycle. With the “new tapped” transformer, the Duty cycle will be: D is original duty cycle = Vo/Vin*1.414, n = NA+Np/NA & L = Lp + LA, Vo/Vin = D’/(D’ +n(1‐D’)), If NA=40Ts, Np=100Ts, n=3.5 D’ = nVo/(Vin+(n‐1)Vo) = 0.21 The duty cycle almost increased by 3 times. The Efficiency will increase about 4 to 5% (before the Efficiency was about 72% now is 77%) comparing with the “none tapped” transformer. AP1694AEV10 Rev2 July 2015 www.diodes.com Page 2 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver DIODES TAPPED TRANSFORMER DESIGN AP1694A 120VAC Buck tapped 12V 400mA Transformer Spec 1) Bobbin EEP10 4+4 pin 1 WD2: Primary 30#*1, 50Ts 6 6 WD1: P r i m a r y 2 WD3: Auxiliary 36#1, 86Ts 34#*1, 74Ts 7 5 2) Transformer Parameters 1. Primary Inductance (Pin1‐Pin7, all other windings are open) Lp = 0.6mH ± 5%@1kHz 2. Primary Winding Turns: NP=74Ts (Pin7‐Pin6) + 50Ts (Pin 6 to Pin 1) 3. Auxiliary Winding Turns (Pin2‐ Pin5): NA= 86Ts (Pin 2 to Pin 5) 3) Transformer Winding Construction Diagram Winding Number Windings Winding Specification 2 WD1‐Primary Winding WD2‐Primary Winding Insulation 3 WD3‐Auxiliary Winding Start at Pin 2, wind 86 turns of single Φ36# wire and finish on Pin 5. 4 Insulation 2 Layers of insulation tape 1 AP1694AEV10 Rev2 July 2015 www.diodes.com Start at Pin 7, wind 74 turns of single Φ34# wire and finish on Pin 6. Start at Pin 6, wind 50 turns of single Φ30# wire and finish on Pin 1. 2 Layers of insulation tape Page 3 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver Evaluation Board Schematic Figure 3: Evaluation Board Schematic Evaluation Board Layout Figure 4: PCB Board Layout Top View Figure 5: PCB Board Layout Bottom View Quick Start Guide 1. 2. 3. 4. 5. 6. By default, the evaluation board is preset at 400mA LED Current adjustment by R10//R11. Ensure that the AC source is switched OFF or disconnected. Connect the AC line wires of power supply to “AC+ and AC‐” on the left side of the board. Connect the anode wire of external LED string to LED+ output test point. Connect the cathode wire of external LED string to LED‐ output test point. Turn on the main switch. LED string should light up. AP1694AEV10 Rev2 July 2015 www.diodes.com Page 4 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver Bill of Material # Name QTY Part number Manufacturer Description 1 U1 1 AP1694AS‐13 Diodes Inc LED Driver, SO7 2 T1 1 EL1004R Elite Electronics EE10, Transformer 3 BD1 1 HD06‐T Diodes Inc Bridge Rectifiers 0.8A 600V 4 D1 1 DFLU1400‐7 Diodes Inc Rectifier 1A/400V 5 D2 1 B1100B Diodes Inc Rectifier 1A/100V 6 D3 1 MMSZ5250B‐7‐F Diodes Inc Zener Diode, 20V 7 F1 1 C1Q1 Bel Fuse Fuse, 1A/125V 8 Q1 1 AOU3N60 Alpha Omega MOSFET N‐CH 600V 3A IPAK 9 Q2 1 BSS127S‐7 Diodes Inc MOSFET N‐CH 600V 0.05A SOT‐23 10 L1 1 LPS6235‐475MR Coilcraft 4.7mH/130mA 11 C1A, C2 2 C1210X224K501T Holystone CAP CER 1210 0.22µF 200V X7R 12 C1B 0 Not fitted 13 C3 1 GMK316BJ106KL‐T Taiyo Yuden CAP CER 10µF 35V X5R 1206 14 C4 1 EEU‐FR1E331B Panasonic CAP 330µF/25V (8 x 13mm) 15 C6 1 C1206X0683K501T Holystone CAP CER 1206 0.068µF 500V X7R 16 R1 1 RC0805FR‐077K5L Yageo America RES 7.5KΩ 1/8W 1% 0805 SMD 17 R2 1 FMP100JR‐52‐330 Yageo America RES 330Ω 1W 5% FMP100 18 R3A, R3B 2 RC0805FR‐07120KL Yageo America RES 120KΩ 1/8W 1% 0805 SMD 19 R4 1 RC1206FR‐073K0L Yageo America RES 3.0KΩ 1/8W 1% 1206 SMD 20 R5 1 RC0603FR‐0720KL Yageo America RES 20KΩ 1/8W 1% 0603 SMD 21 R6 1 RC0603JR‐0722RL Yageo America RES 22Ω 1/8W 1% 0603 SMD 22 R7 1 RC0603FR‐0711KL Yageo America RES 11KΩ 1/8W 1% 0603 SMD 23 R8 1 RC0603FR‐0772KL Yageo America RES 72KΩ 1/8W 1% 0603 SMD 24 R9 1 RC0603FR‐071K5L Yageo America RES 1.5KΩ 1/8W 1% 0603 SMD 25 R10 1 MCR10ERTFL2R02 Rohm RES 2.02Ω 1/8W 1% 0805 SMD 26 R11 1 MCR10ERTFL3R57 Rohm RES 3.57Ω 1/8W 1% 0805 SMD 27 R12 1 RC1206FR‐073K0L Yageo America RES 3.0KΩ 1/8W 1% 1206 SMD 28 R13 1 RC0805FR‐0730K0L Yageo America RES 30KΩ 1/8W 1% 0805 SMD 29 R14 1 RC0201JR‐0710KL Yageo America RES 10KΩ 1/8W 1% 0603 SMD 30 Rf 1 FMP100JR‐52‐680 Yageo America RES 68Ω 1W 1% FMP 31 Rm 1 MOV‐07D431KTR Bournes MOV, 275VAC AP1694AEV10 Rev2 July 2015 www.diodes.com Page 5 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver Functional Performance Manuf Board Type VIN (VAC) PFC PIN (W) VLED (V) ILED (mA) PLED (W) ILED (%) Efficiency (%) Athd (%) Diodes Inc AP1694AEV10 Module Board 100 0.982 5.54 11.28 377.0 4.25 ‐5.75 77.6 11.1 110 0.979 6.02 11.30 407.3 4.60 1.60 77.4 13.5 120 0.972 6.03 11.29 414.2 4.68 3.65 77.5 16.9 130 0.967 6.08 11.28 419.6 4.73 4.90 77.2 17.2 135 0.951 6.23 11.27 422.1 4.76 5.55 76.4 19.3 Functional Performance LED Current (mA) vs Vin (VAC) AP1694AEV10 82 430 80 420 LED Current [mA] Efficiency [%] Efficiency (%) vs Vin (VAC) 78 76 74 410 400 390 380 370 72 90 100 110 120 130 90 140 100 110 120 130 140 Vin [VAC] Vin [VAC] Figure 7. LED Current vs. Vin Figure 6. Efficiency vs. Vin LED Current (%) vs Vin (VAC) PFC vs Vin (VAC) AP1694AEV10 6 1.00 4 0.80 2 AP1694AEV10 0.60 PFC LED Current [%] AP1694AEV10 0 0.40 ‐2 0.20 ‐4 ‐6 0.00 90 100 110 120 130 140 90 100 Vin [VAC] Figure 8. LED Current Line Regulation AP1694AEV10 Rev2 July 2015 www.diodes.com 110 120 130 Vin [VAC] Figure 9. PFC vs. Vin Page 6 of 10 140 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver Performance Waveforms Figure 10. Turn on time (80mS) at 120VAC input Figure 12. Input AC voltage vs. output current AP1694AEV10 Rev2 July 2015 www.diodes.com Figure 11. Output Voltage & Current at 120VAC Figure 13. Input AC voltage vs. input AC current Page 7 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver Dimmer Compatibility Performance List (120VAC Dimmers) 120VAC Dimmers Io(mA) Dimming (%) Index Brand Performance Result Model min max min max (No flicker) 1 S‐603PG 8.5 283.6 2.1 70.9 2 D‐603PGH 0 284.2 0 71.1 LG‐600P 21 345.0 5.3 86.3 4 DV‐600P 19 348.7 4.8 87.2 5 D‐600PH 0 333.5 0 83.4 6681 11 398.9 2.8 99.7 6631 7.2 365.1 1.8 91.3 SAL06P 44 387.1 11 96.8 √ √ √ √ √ √ √ √ 3 Lutron 6 Leviton 7 8 Note: Cooper √ = No Flicker EMC test result Conductive emission noise level (Pass with 15db margin) AP1694AEV10 Rev2 July 2015 www.diodes.com Page 8 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 LED Driver Radiated emission noise level (Pass, please zoom in to see the green mark) Note: Green color data are after VQP, will be 5db down than normal AP1694AEV10 Rev2 July 2015 www.diodes.com Page 9 of 10 AP1694AEV10 User Guide 120VAC Triac Dimmable GU10 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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