Semiconductor Components Industries, LLC, 2002
June, 2002 – Rev. 4
1 Publication Order Number:
AND8019/D
AND8019/D
Offline Converter Provides
5.0 Volt, 1.0 Amp Output for
Small Electronic Equipment
Prepared by: Alan Ball
ON Semiconductor
General Description
ON Semiconductor’s NCP1000 series of offline
converters offers a low cost, high efficiency power source
for low power, electronic equipment. It serves the same
function as small, line frequency transformers, but with the
added benefits of line and load regulation, transient
suppression, reduction in weight, and operation across the
universal input voltage range.
This kit provides a 5.0 volt, 1.0 amp output, which is
derived from an input source of 85 to 265 VAC, and 50 Hz
to 60 Hz. This range of input voltages will allow this circuit
to function virtually anywhere in the world without
modification. The output is regulated and current limited.
Both common mode and differential mode EMI filtering are
incorporated on the ac line.
Features
• Output Well Regulated Over Changes in Line and Load
• Minimal Parts Count
• Universal Input Voltage Range
• 100 kHz Switching Frequency
• Power Switch and Current Sense Built into Chip
• No External Startup Circuit Required
• Thermal Shutdown Circuitry Included
• Board Designed for EMI and UL Approvals
Parts List
Description / Manufacturer Part Number Reference
Cap, x–series, .082 F, 250 Vac
Panasonic
ECQ–U2A823MV C1
Cap, Alum elect, 10 F, 450 V
Panasonic
EEU–EB2W100 C2, C3
Cap, ceramic, 2.2 pF, 1000 Vac
Panasonic
ECK–D3A222KBP C4
Cap, Alum elect, 3.3 F, 25 V
Panasonic
ECE–A1EKK3R3 C5
Cap, ceramic, 1.0 F, 10 V, 0603
TDK
C1608X5R1A105K C6
Cap, ceramic, .01 F, 50 V, 0603
TDK
C1608X7R1A103K C7, C11
Cap, Alum elect, 10 F, 25 V
Panasonic
ECA–1EM100 C8
Cap, Alum elect, 1500 F, 6.3 V
Panasonic
EEU–FCOJ152 C9, C10
Cap, class X1, 1.0 nF, 440 Vac
Vishay/Roederstein
WYO102MCMBFOK C12
Diode, Rectifier, 600 V, 1.0 A
ON Semiconductor
1N4005 D1–D4
Rectifier, Schottky, 40 V, 3.0 A
ON Semiconductor
MBRS340T3 D5
Diode, Switching, 70 V, 200 mA
ON Semiconductor
MMBD6050LT1 D6
Diode, Ultra–Fast 600 V, 1.0 A,
ON Semiconductor
MUR160 D7
Fuse, 160 mA, 250 Vac
Cooper Bussman
BK/ETF–160MA F1
Inductor, 33 H
Cooper Coiltronics
UP0.4C–330 L1
Connector
Beau
830502 P1, P2
Resistor, 470 , 5%
Vishay/Dale
CRCW1206–471–5% R1
Resistor, 4.7 k, .25 W, 5% – R2
Resistor, 270 , 5%
Vishay/Dale
CRCW1206–271–5% R3
Resistor, 2.0 k, 5%
Vishay/Dale
CRCW1206–2k1% R4, R5
Resistor, 6.8 , .25 W, 5% – R6, R7
Resistor, 10 , .25 W, 5% – R8, R9
Transformer, flyback
Cooper Coiltronics
CTX13–14602 T1
IC, Switching Regulator
ON Semiconductor
NCP1000P U1
Optocoupler
Lumex
67–1560–5 U2
IC, Voltage Regulator
ON Semiconductor
TL431AID U3
APPLICATION NOTE
http://onsemi.com
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