Flyback Transformers
Document 245
Document 245 Revised 01/31/05
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) 80 1500 1 : 0.08 — 6.5 V, 0.54 A 6.7
0.07 (4-1)
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) 16 1500 1 : 0.164 — 16 V, 4.2 A 52
0.013 (6-1)
0.013 (4-3)
70 W Z9260-AL 0.7 0.261 (12-7) 26 2000 1 : 0.164 1 : 0.15 16 V, 4.2 A(sec) 54
with Auxilary winding 0.013 (6-1) 15 V, 0.2 A (aux)
0.013 (4-3)
0.045 (11-8)
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.
A
112
67
Bottom view
3
3
1
1
4
4
6
6
11
7
7
8
Z9007-BL
Z9260-AL
Pri
Pri
Sec
Sec
1
5
10
6
PriSec
Y8848-AL
1
4
8
5
Bottom view
E
FG
1
4
8
5
Pri Sec
Y8844-AL
B
C
D
B
C
D
A
5
1
6
10
Bottom view
1
1
E (7 places)
H
FG
A
B
C
D
1
E(9 places
)
H
FG
12
12
Aux
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
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.
For ON Semiconductor
NCP1200 Controller
Terminations: Tin-silver over tin over copper
For Z9007-BL and
Z9260-AL, secondary
windings to be con-
nected in parallel on
the circuit board.
Y8844-AL Y8848-AL Z9007-BL, Z9260-AL
Packaged
49 per tray
Packaged
30 per tray
Packaged 25 per tray
