Document 682 Flyback Transformer For Microchip Technology’s Isolated AC LED driver • Developed specifically for Microchip Technology’s Isolated AC LED driver to operate with PIC16HV785 CMOS Microcontroller and MCP1402 Gate Driver • Universal ac input; 20 V, 0.7 A output; Operates at 125 kHz • 3000 Vrms, one minute isolation from the primary and bias to the secondary winding • Bias winding supplies 12 V to power the microprocessor Core material Ferrite Terminations RoHS tin-silver over tin over copper clad steel. Other terminations available at additional cost. Weight 11.7 g Ambient temperature –40°C to +85°C Storage temperature Component: –40°C to +85°C. Packaging: –40°C to +80°C Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 117 parts per tray PCB washing Only pure water or alcohol recommended InductanceInductance DCR max (Ohms) Part Power at 0 A1 at Ipk2 number (W) ±10% (µH) min (µH) pri sec bias GA3172-AL 14 500 450 0.6750.245 0.325 2 10 Sec 1 1 : 0.2141 : 0.131 8.25 Ipk2 (A) Output4 0.78 20 V, 0.7 A 0.935 23,74 0.118 min 3,00 0.020 0,50 0.400 10,16 6 0.561 14,25 5 Bias Leakage Turns ratio inductance3 max (µH) pri : sec pri : bias Dot indicates pin 1 1. Inductance measured at 125 kHz, 0.1 Vrms, 0 Adc. 2. Peak primary current drawn at minimum input voltage. 3. Leakage inductance is for the primary and is measured with the secondary shorted. 4. Output is for the secondary. Bias winding output is 12 V. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Pri 5 Recommended PC Board Layout 0.150 typ 3,80 1 6 0.400 10,16 4 0.876 22,25 1 10 0.039 ∅ 1,00 (10 ×) Dimensions are in US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] inches mm Document 682 Revised 09/01/09 © Coilcraft Inc. 2012 This product may not be used in medical of high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information.