DA2077-AL

Document 518
Flyback Transformer
For ON Semiconductor
NCP1027
The DA2077-AL flyback transformer has been specifically
developed for use with ON Semiconductor’s NCP1027
Standby Power Supply for ATX Applications and is specified in Application Note AND8241/D.
This transformer is designed for universal input, 85 –
265 Vac. It operates in continuous conduction mode
within an input voltage range of 120 Vdc to 375 Vdc and
at a 65 kHz switching frequency. Primary to secondary
isolation is 2000 Vrms tested for one minute.
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit www.coilcraft.com.
Part
number
Inductance
Leakage
DCR max (Ohms) inductance2
at 0 A1
±10% (mH)
pri
sec
aux
max (µH)
Turns ratio
pri : sec pri : auxOutput
DA2077-AL
3.4
2.53
0.042 0.574
114
1 : 0.061 : 0.15
5 V, 2 A (sec)
12.5 V, 10 mA (aux)
1. Inductance is for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc
2. Leakage inductance tested at 100 kHz, 0.1 Vrms
3. Operating temperature range -40°C to +85°C.
4. Electrical specifications at 25°C.
1.100 max
27,94
0.950 max
24,13
10
5
Primary
Secondary
6
1
7
Auxiliary
9
0.620
15,75
0.150 ±0.030
3,81 ±0,76
6
5
0.150
3,81
Recommended
Board Layout
1
0.200
(7 places)
5,08
1.100 max
27,94
1
0.0346
0,879
10
Bottom View
0.620
15,75
0.060
1,52
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Weight:
16.5 g
Terminations: Matte tin over copper
Packaged: 49 parts per tray
Document 518 Revised 12/02/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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