![](http://datasheet.mmic.net.cn/210000/GA3172-AL_datasheet_15434538/GA3172-AL_1.png)
Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Flyback Transformer
Document 682
Document 682
Revised 09/01/09
Inductance Inductance
at 0 A
1
±10% (μH)
500
Leakage
inductance
3
max (μH)
8.25
Part
number
GA3172-AL
Power
(W)
14
at
I
pk
2
min (μH)
450
DCR max (Ohms)
pri
sec
0.675
0.245
Turns ratio
pri : sec pri : bias
1
:
0.214 1
:
0.131
I
pk
2
(A)
0.78
bias
0.325
Output
4
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.
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
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
For Microchip Technology’s
Isolated AC LED driver
Dimensions are inimm
1
2
10
6
Bias
Pri
Sec
4
5
0.935
23,74
0.118
3,00
0.020
0,50
min
0.876
22,25
0.561
14,25
0.400
10,16
0.400
10,16
0.150
3,80
Recommended
PC Board Layout
0.039
1,00
(10 ×)
typ
1
1
10
5
6
Dot indicates pin 1