NCP1271P100G ON Semiconductor, NCP1271P100G Datasheet - Page 18

• Manufacturer Part Number: NCP1271P100G
• Description: IC CTRLR PWM CM OVP OTP HV 7DIP
• Manufacturer: ON Semiconductor
• Series: Soft-Skip™r

Specifications of NCP1271P100G

• Output Isolation: Either
• Frequency Range: 85 ~ 107kHz
• Voltage - Input: 9.1 ~ 20 V
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-DIP (0.300", 7.62mm), 7 Leads
• Number Of Outputs: 1
• Duty Cycle (max): 80 %
• Output Voltage: - 0.3 V to + 20 V
• Output Current: 800 mA
• Mounting Style: Through Hole
• Switching Frequency: 100 KHz
• Maximum Operating Temperature: + 150 C
• Fall Time: 20 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 30 ns
• Synchronous Pin: No
• Topology: Flyback
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NCP1271. The standby power consumption of the circuit
is 83 mW with 230 Vac input. The details of the application
85 to
265 Vac
Figure 42 shows a typical application circuit using the
Fuse 2A
Flyback transformer :
Cooper CTX22−17179
Lp = 180uH, leakage 2.5uH max
np : ns : naux = 30 : 6 : 5
Hi−pot 3600Vac for 1 sec, primary to secondary
Hi−pot 8500Vac for 1 sec, winding to core
E3506−A
T1
IC1 NCP1271A
95
90
85
80
75
70
65
60
1N5406 x 4
0
D1 − D4
Figure 42. 57 W Example Circuit Using NCP1271
120 Vac
Figure 43. Efficiency of the NCP1271 Demo
D10 MZP4746A (18V)
10
Board at Nominal Line Voltages
230 Vac
R2 10
20
http://onsemi.com
P
out
30
18
C5 10 nF
(W)
D7 MURS160
C11 1nF/ 1000V
circuit are described in application note AND8242/D. The
efficiency of the circuit at light load up to full load is shown
in Figure 43.
R6 10
R7 511
0.25 / 1W
40
R8
50
D8 MBR3100
60
IC4 TL431
C12
0.15 uF
19 V / 3 A
+
−