© Semiconductor Components Industries, LLC, 2006

February, 2006 − Rev. 8

1

Publication Order Number:

NCP1000/D

NCP1000, NCP1001,

NCP1002

Integrated Off−Line

Switching Regulator

The NCP1000 through NCP1002 series of integrated switching

regulators, combine a fixed frequency PWM controller with an integrated

high voltage power switch circuit. This chip allows for simple design and

minimal parts count for very low cost applications which utilize an ac

input. This chip is designed to power a single ended topology, typically a

discontinuous mode flyback, with secondary side sensing.

The internal high voltage switch circuit and startup circuit can

function in continuous operation over a wide range of inputs, from

85 Vac to 265 Vac, and thus can be used in any existing power system in

the world. Though inexpensive, these devices include a number of

features such as undervoltage lockout, over−temperature protection,

bandgap reference and leading edge blanking that make them an

excellent value.

Features

Typical Applications

POWER

SWITCH

CIRCUIT

INTERNAL BIAS

UVLO &

OPTO FAIL−SAFE

STARTUP

CIRCUIT

STARTUP

−

+

PWM

COMPARATOR

PWM CONTROL

& POWER

SWITCH CIRCUIT

OSCILLATOR

FEEDBACK

INPUT

GND

Figure 1. Simplified Block Diagram

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

Device

Package

Shipping

ORDERING INFORMATION*

NCP1000P

PDIP−8

50 Units/Rail

NCP1002P

PDIP−8

PDIP−8

P SUFFIX

CASE 626

1

8

NCP1001P

PDIP−8

x

= Device Number 0, 1, or 2

A

= Assembly Location

WL = Wafer Lot

YY

= Year

WW = Work Week

G

= Pb−Free Package

1

8

Pin: 1.

2.

Feedback Input

3, 6−8 Ground

4.

Startup

5.

Power Switch Circuit

Ipk

Typ

(A)

Ron

Max

(

W)

0.5

18

1.0

9

1.5

6

NCP100xP

AWL

YYWWG

50 Units/Rail

50 Units/Rail

*Consult factory for additional optocoupler fail−safe

latching, frequency, and current limit options.

http://onsemi.com

NCP1000PG

PDIP−8

(Pb−Free)

50 Units/Rail

NCP1002PG

PDIP−8

(Pb−Free)

NCP1001PG

PDIP−8

(Pb−Free)

0.5

18

1.0

9

1.5

6

50 Units/Rail

50 Units/Rail

MARKING DIAGRAM