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Document 1508-1

No-Opto Flyback Transformers• Three output versions optimized for Texas Instruments
LM5180 and LM5180-Q1 Flyback Converter, Analog Device
LT830x Flyback Converter and similar ICs• Designed to operate up to 350 kHz with 4.5 – 70 V input• 1500 Vrms, one minute isolation between primary and secondaryCore material Ferrite
Terminations RoHS tin-silver-copper over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 2.05 – 2.15 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)
Packaging 300/13″ reel Plastic tape: 32 mm wide, 0.42 mm thick,
20 mm pocket spacing, 10.69 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additionalaqueous wash. See Doc787_PCB_Washing.pdf.		
Inductance Inductance			 4DCR max (Ohms)
Part	 at 0 A2
at 2 A3
number1 ±10% (µH)(µH)
pri   sec1   sec2

LeakageTurns ratio
inductancePowermax (µH)5 pri : sec1 pri : sec2		 (W)

YA8779-BLD
30
240.140 0.013—
0.380
1 : 0.330—
6YA8916-BLD
30
270.360 0.695
0.392
0.565
1:1
1 : 0.52
4.60										YA8864-BLD
30
270.180 0.680
0.180
0.295
1 : 1.5
1 : 0.40
3.50												Output5 V, 1.20 A
15 V, 0.20 A (sec1)8 V, 0.20 A (sec2)
20 V, 0.10 A (sec1)
5 V, 0.30 A (sec2)

1. Packaging:D = 13″ machine-ready reel. EIA-481 embossed plastic tape.
Quantities less than full reel available: in tape (not machineready) or with leader and trailer ($25 charge).
2. Inductance is for the primary, measured at 300 kHz, 0.1 Vrms, 0 Adc.
3. Minimum inductance for the primary, measured at 300 kHz, 0.1 Vrms, 2 Adc.
4. Sec1 DCR for YA8779 is with windings connected in parallel.
5. Leakage Inductance is for the primary, measured with secondary
windings shorted together.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

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 1508-1

Revised 06/14/22© Coilcraft Inc. 2023
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 1508-2

No-opto Flyback Transformers — YA8779, YA8916, YA8864
YA8779, YA8916, YA8864
0.366
max
9,3

Dot indicates pin1

XXXX Y

0.417
max
10,60.402
max
10,2

YA8779-BL

1

0.028
0,71

80.004 / 0.10

0.291
7,4

Internalcode
0.063
1,60

Dimensions are in

0.098
2,49

54Partnumber0.074
1,90.244
6,2

0.098
2,49inches
mm

Recommended
Land Pattern

Schematics
YA8779*

YA8864

YA891688187PriSec5 V, 1.20 A

456Sec1Sec11Pri
415 V, 0.20 A

76Sec2120 V, 0.10 A

7Pri46Sec28 V, 0.20 A

5 V, 0.30 A

55*Connect pin 5 to 6 and pin
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 1508-2

Revised 06/14/22© Coilcraft Inc. 2023
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.