Document 245
Flyback Transformers
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.
Part
number
Y8844-AL
Y8848-AL
Z9007-BL
Z9260-AL
Inductance
1
±10% (mH)
2.9
1.8
0.7
0.7
DCR
max (Ohms)
4.25 (8-5)
0.07 (4-1)
1.77 (10-6)
0.038 (5-1)
0.261 (12-7)
0.013 (6-1)
0.013 (4-3)
0.261 (12-7)
0.013 (6-1)
0.013 (4-3)
0.045 (11-8)
For ON Semiconductor
NCP1200 Controller
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit
www.coilcraft.com.
Application
3.5 W
10 W
70 W
70 W
Leakage
inductance
2
Isolation
3
max (µH)
(Vrms)
80
1500
60
16
26
2000
1500
2000
Turns ratio
pri : sec pri : aux
1
:
0.08
—
1
:
0.1
1
:
0.16
4
1
:
0.16
4
—
—
1
:
0.15
Output
6.5 V, 0.54 A
12 V, 0.83 A
16 V, 4.2 A
16 V, 4.2 A(sec)
15 V, 0.2 A (aux)
Weight
(g)
6.7
16
52
54
with Auxilary winding
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
C
Y8848-AL
B
C
Z9007-BL, Z9260-AL
B
B
D
4
5
5
1
8
6
D
For Z9007-BL and
Z9260-AL, secondary
windings to be con-
nected in parallel on
the circuit board.
Z9007-BL
12
6
4
C
D
6
7
Bottom view
Packaged
49 per tray
Y8844-AL
8
4
1
A
Pri
7
Sec
3
1
E
Packaged
30 per tray
Y8848-AL
10
5
1
10
A
1
Bottom view
12
1
Z9260-AL
E (7 places)
Pri
7
11
6
4
12
Pri
5
Sec
1
Pri
F
G
6
Sec
1
Sec
3
1
1
Bottom view
E (9 places)
H
H
F
G
Aux
8
Packaged 25 per tray
Y8844-A
Y8848-A
Z9007-B, Z9260-A
A max
0.72
18,3
1.10
27,9
1.45
36,8
B max
0.79
20,1
1.10
27,9
1.45
36,8
C max
0.55
14,0
0.95
24,1
1.17
29,7
D min
0.118
3,0
0.12
3,05
0.12
3,05
E
0.150
3,81
0.200
5,08
0.200
5,08
F
0.600
15,24
0.620
15,75
0.875
22,2
G dia
0.030
0,76
0.044
1,12
0.044
1,12
H (1 place)
inches
mm
inches
mm
inches
mm
F
G
0.150
3,81
0.150
3,81
Terminations:
Tin-silver over tin over copper
Document 245
Revised 01/31/05