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Document 245
Flyback Transformers For ON Semiconductor
NCP1200 Controller
These transformers have been specially developed for
use in flyback power supplies with the ON Semiconduc-
tor NCP1200 PWM Current-Mode Controller. They are
designed for universal input, 85 – 265 Vac.
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit www.coilcraft.com.
Leakage
Part  Inductance1
DCR  inductance2 Isolation3    Turns ratio Weight
Application number ±10% (mH) max (Ohms) max (µH)  (Vrms) pri : sec pri : aux Output (g)
3.5 W
Y8844-AL
2.9
4.25 (8-5)
0.07 (4-1)
80
1500
1:0.08
6.5 V, 0.54 A 6.7
10 W
Y8848-AL
1.8
1.77 (10-6)
60
2000
1:0.1  
12 V, 0.83 A 16
0.038 (5-1)
70 W
Z9007-BL
0.7
0.261 (12-7)
0.013 (6-1)
0.013 (4-3)
16
1500
1:0.164
16 V, 4.2 A 52
70 W
Z9260-AL
0.7
with Auxilary winding
0.261 (12-7)
26
2000
1 : 0.164 1 : 0.15
0.013 (6-1)
0.013 (4-3)
0.045 (11-8)
16 V, 4.2 A(sec) 54
15 V, 0.2 A (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. Isolation tested between primary and secondary on all parts and be-
tween primary and auxiliary on Z9260-AL.
4. Primary to secondary turns ratio specified with secondary windings con-
nected in parallel.
5. Operating temperature range -40°C to +85°C.
6. Electrical specifications at 25°C.
Y8844-AL
A
Y8848-AL
B
Z9007-BL, Z9260-AL
B
C
B
D
45
18
Bottom view
Packaged
49 per tray
Y8844-AL
84
Pri Sec
51
1
F
E
G
Packaged
30 per tray
Y8848-AL
10 5
Pri Sec
61
C
D
For Z9007-BL and
Z9260-AL, secondary
windings to be con-
nected in parallel on
the circuit board.
56
Z9007-BL
6
12 4 6
A Pri
Sec
73
1 10
1
Bottom view
Z9260-AL
12
1
H
E (7 places)
Pri
7
11
Aux
8
6
4
Sec
3
1
1
Bottom view
1
FG
Packaged 25 per tray
H
C
D
7
A
12
E (9 places)
A max B max C max D min E
F G dia H (1 place)
Y8844-A
0.72 0.79 0.55 0.118 0.150 0.600 0.030 inches
18,3 20,1 14,0 3,0 3,81 15,24 0,76 mm
Y8848-A
1.10 1.10 0.95 0.12 0.200 0.620 0.044 0.150 inches
27,9 27,9 24,1 3,05 5,08 15,75 1,12 3,81 mm
Z9007-B, Z9260-A 1.45 1.45 1.17 0.12 0.200 0.875 0.044 0.150 inches
36,8 36,8 29,7 3,05 5,08 22,2 1,12 3,81 mm
FG
Terminations:  Tin-silver over tin over copper
Document 245  Revised 01/31/05