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Document 1647-1

No-Opto Flyback Transformers YA903x-AL• Optimized for LM25180 and LM5180 flyback converters fromTexas Instruments• Five output versions for various single-output designs with4 – 65 V input• Eliminates auxiliary winding for simple and reliable converter
designs

Core material Ferrite
Terminations RoHS tin-silver-copper over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 2 – 2.3 g
Ambient temperature –40°C to +85°C
Max Part Temperature +125°C (ambient + temperature rise)
Storage temperature Component: –40°C to +125°C
Tape and reel 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)
PCB washing Tested to MIL-STD-202 Method 215 plus an additionalaqueous wash. See Doc787_PCB_Washing.pdf.		
InductancePart	  at 0 A2
number1±10% (µH)
YA9033-ALD
YA9034-ALD
YA9035-ALD
YA9036-ALD
YA9037-ALD
1. Packaging:

3236303032Inductance
min at 32 A (µH)
25.6
28.8
24.0
24.0
25.6

DCRmax (Ohms)
pri    sec
0.240
0.244
0.168
0.168
0.232

0.032
0.084
0.168
0.437
1.444

D = 13″ machine-ready reel. EIA-481 embossed plastictape (300 parts per full reel). Quantities less than fullreel available: in tape (not machine ready) or withleader and trailer ($25 charge).
2. Inductance is for the primary, measured at 300 kHz, 0.1 Vrms, 0 Adc.
3. Minimum inductance is for the primary, measured at 300 KHz,
0.1 Vrms, 2 Adc.
4. Leakage inductance is for the primary winding with the secondary
windings shorted.
5. 1500 Vrms, one minute isolation (hipot) between primary and secondary.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Leakageinductancemax (µH)4Turns ratio
pri : sec

Isolation5(Vrms)

Power(W)

Output

0.480
0.426
0.290
0.314
0.384

1 : 0.5
1 : 0.666
1:1
1:2
1:3

1500
1500
1500
1500
1500

666668 V, 0.75 A
12 V, 0.5 A15 V, 0.4 A
24 V, 0.25 A
48 V, 0.1 A

Schematics

Connect pin 5 to 6 andpin 7 to 8 on the PC board

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 1647-1

Revised 05/12/21© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.

Document 1647-2

No-Opto Flyback Transformers – YA903x-AL
Dimensions

Dimensions are ininches
mm

Packaging 300 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm
thick, 20 mm pocket spacing, 10.69 mm pocket depth

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 1647-2

Revised 05/12/21© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.