© Semiconductor Components Industries, LLC, 2014

September, 2014 − Rev. 11

1

Publication Order Number:

NCP1030/D

NCP1030, NCP1031

Low Power PWM Controller

with On-Chip Power Switch

and Startup Circuits for

48V Telecom Systems

The NCP1030 and NCP1031 are a family of miniature high−voltage

monolithic switching regulators with on−chip Power Switch and Startup

Circuits. The NCP103x family incorporates in a single IC all the active

power, control logic and protection circuitry required to implement, with

minimal external components, several switching regulator applications,

such as a secondary side bias supply or a low power dc−dc converter.

This controller family is ideally suited for 48 V telecom, 42 V automotive

and 12 V input applications. The NCP103x can be configured in any

single−ended topology such as forward or flyback. The NCP1030 is

targeted for applications requiring up to 3 W, and the NCP1031 is

targeted for applications requiring up to 6 W.

The internal error amplifier allows the NCP103x family to be easily

configured for secondary or primary side regulation operation in

isolated and non−isolated configurations. The fixed frequency oscillator

is optimized for operation up to 1 MHz and is capable of external

frequency synchronization, providing additional design flexibility. In

addition, the NCP103x incorporates individual line undervoltage and

overvoltage detectors, cycle by cycle current limit and thermal

shutdown to protect the controller under fault conditions. The preset

current limit thresholds eliminate the need for external sensing

components.

Features

Typical Applications

http://onsemi.com

SO−8

D SUFFIX

CASE 751

MARKING

DIAGRAMS

A = Assembly Location

L

= Wafer Lot

Y = Year

W = Work Week

G = Pb−Free Package

Micro8

t

DM SUFFIX

CASE 846A

1030

AYW

G

G

8

1

8

1

1

GND

2

3

4

COMP

OV

UV

8

7

6

5

(Top View)

PIN CONNECTIONS

8

1

N1031

ALYW

G

1

8

(Note: Microdot may be in either location)

See detailed ordering and shipping information in the package

dimensions section on page 19 of this data sheet.

ORDERING INFORMATION

DFN−8

MN SUFFIX

CASE 488AF

NCP

1031

ALYW

G

G

(Top View)

EP Flag

GND

COMP

OV

UV

1