Document 605
For ON Semiconductor
Flyback Transformer NCP1351 Controller
• Dual-output flyback transformer for ON Semiconductor’s
NCP1351 Variable Off Time PWM Controller.
• 32 V, 1.0 A and 16 V, 0.75 A Outputs. Output of the
auxiliary winding is 16 V.
• Operates in a discontinuousmode with a universal input
• 3000 Vrms primary to secondary isolation.
Core material Ferrite
Terminations RoHS tin-silver over tin over phos bronze. Other
terminations available at additional cost.
Weight 23.5 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
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)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 64 parts per tray
PCB washing Only pure water or alcohol recommended
DCR max (Ohms)
sec1 sec2
0.027 0.045 0.26
Part
L at 0 A1
L at Ipk2
Leakage L3
max (µH)
Turns ratio
Ipk2
number
±10% (µH)
min (µH)
pri
aux
pri : sec1 : sec2 : aux
(A)
GA0007-AL
270
243
0.25
8.16
5 : 1 : 1 : 1
3.0
1. Inductance is for the primary, measured at 45 kHz, 0.8 Vrms, 0 Adc.
2. Ipk is the peak current drawn at minimum input voltage.
3. Leakage inductance measured on the primary winding with all secondary pins shorted.
4. Ambient operating temperature range
5. Electrical specifications at 25°C.
–40°C to +85°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.150
(4)
0.100
2,54
(6)
Dot indicates pin 1
14
3,81
1
14
1
6
32 V, 1.0 A
2
11
0.500
12,70
Pri
Sec2
0.935
23,75
max
3
13
8
16 V, 0.75 A
Gnd
4
7
0.044
Sec1
(14)
1.170
29,72
0.800
20,42
1,10
max
Aux
10
5
Recommended
Board Layout
Secondary windings to be connected
in series on the PC board.
0.900
22,86
max
0.023
0,584
sq
0.800
20,42
0.150 ±0.01
3,81 ±0,25
Specifications subject to change without notice.
Please check our website for latest information.
Document605 Revised04/26/07
© Coilcraft, Inc. 2009