© 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

Parts List

Description / Manufacturer

Part Number

Reference

Cap, x–series, .082

mF, 250 Vac

Panasonic

ECQ–U2A823MV

C1

Cap, Alum elect, 10

mF, 450 V

Panasonic

EEU–EB2W100

C2, C3

Cap, ceramic, 2.2 pF, 1000 Vac

Panasonic

ECK–D3A222KBP

C4

Cap, Alum elect, 3.3

mF, 25 V

Panasonic

ECE–A1EKK3R3

C5

Cap, ceramic, 1.0

mF, 10 V, 0603

TDK

C1608X5R1A105K

C6

Cap, ceramic, .01

mF, 50 V, 0603

TDK

C1608X7R1A103K

C7, C11

Cap, Alum elect, 10

mF, 25 V

Panasonic

ECA–1EM100

C8

Cap, Alum elect, 1500

mF, 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

mH

Cooper Coiltronics

UP0.4C–330

L1

Connector

Beau

830502

P1, P2

Resistor, 470

W, 5%

Vishay/Dale

CRCW1206–471–5%

R1

Resistor, 4.7 k

W, .25 W, 5%

–

R2

Resistor, 270

W, 5%

Vishay/Dale

CRCW1206–271–5%

R3

Resistor, 2.0 k

W, 5%

Vishay/Dale

CRCW1206–2k1%

R4, R5

Resistor, 6.8

W, .25 W, 5%

–

R6, R7

Resistor, 10

W, .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