GA3172-AL Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Flyback Transformer

Document 682
Flyback Transformer ForMicrochipTechnology’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 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
Part
number
GA3172-AL
Inductance Inductance
Power at 0 A¹
at Ipk^{2 DCR max (Ohms)}
(W) ±10% (µH) min (µH) pri sec bias
14
500
450 0.675 0.245 0.325
Leakage
inductance³
Turns ratio
max (µH) pri : sec pri : bias
8.25
1 : 0.214 1 : 0.131
Ipk²
(A) Output⁴
0.78 20 V, 0.7 A
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.
Dot indicates pin 1
0.935
23,74
2
Pri
1
5
Bias
4
© Coilcraft, Inc. 2009
10
Sec
0.400
10,16
0.118
3,00
min
0.020
Recommended
6
0,50
0.561
PC Board Layout
14,25
0.150
3,80
typ
0.400
10,16
1
5
6
0.876
22,25
1
10
Specifications subject to change without notice.
Please check our website for latest information.
0.039
1,00
∅
(10 ×)
Dimensions are in
inches
mm
Document 682 Revised 09/01/09