Coilcraft GA3157-AL Smt power transformer Datasheet

Document 686
SMT Power Transformer
For Analog Devices ADM2482E and
ADM2487E RS-485 Transceivers
• Designed specifically for use with Analog Devices
ADM2482E and ADM2487E High Speed, Isolated RS-485
Transceivers with Integrated Transformer Driver
• Center tapped primary and secondary
• 2500 Vrms primary to secondary isolation
Core material Ferrite
Terminations RoHS compliant tin-silver over tin over nickel over
phos bronze. Other terminations available at additional cost.
Weight 1.0 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
Packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
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 600 per 13″ reel; Plastic tape: 24 mm wide,
0.37 mm thick, 16 mm pocket spacing, 6.1 mm pocket depth
PCB washing Only pure water or alcohol recommended
number1
Part
GA3157-AL_
Pri / sec
voltage
5 V to 3.3 V
Inductance2
min (µH)
45.6
Leakage
inductance4
max (µH)
1.14
DCR max (Ohms)3
1/2 pri
1/2 sec
0.130
0.155
1. When ordering, please specify termination and packaging codes:
4
L = 45.6 µH min
DCR = 0.13 Ohms max
Primary
3
2
L = 45.6 µH min
DCR = 0.13 Ohms max
1
1
0.394 max
10,00
0.063
1,60
0.079
2,00
0.475 max
12,07
0.235 max
5,97
0.004 / 0,10
0.067
1,70
8
4
5
3
6
2
7
1
8
0.358
9,09
1
8
DCR = 0.155 Ohms max
7
6
Secondary
DCR = 0.155 Ohms max
0.079
2,00
0.063
1,60
5
Primary windings and secondary windings
to be connected in series on the PC board.
inches
Dimensions are in
mm
Specifications subject to change without notice.
Please check our website for latest information.
© Coilcraft, Inc. 2009
Power6 Turns ratio
(W)
pri : sec
7.2
1 : 0.88
Dot indicates pin 1
Coilcraft
GA3157-AL
CCIxxxx
GA3157-ALD
Termination: L = RoHS compliant tin-silver over tin over nickel over
phos bronze.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or
S = non-RoHS tin-lead (63/37).
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape (600 per full reel).
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
2. Inductance is tested between pins 4 and 3 at 500 kHz, 0.5 Vrms, 0 Adc.
3. DCR is for each half of the primary and secondary.
4. Leakage inductance is for the primary with both windings connected in
series and with the secondary windings shorted.
5. Based on Bsat of the core at 25°C and number of turns on winding 4-3.
6. Calculated output power based on 150 kHz operating frequency. Power
varies depending on application.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Volt-time
product5
(V-µsec)
34.4
Document 686
Recommended
Land Pattern
Revised 10/16/09
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