NCP1072STBT3G(2012) 查看數據表（PDF） - ON Semiconductor

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NCP1072STBT3G
(Rev.:2012)

High-Voltage Switcher for Low Power Offline SMPS

ON Semiconductor 

NCP1072, NCP1075

High-Voltage Switcher for

Low Power Offline SMPS

The NCP1072/NCP1075 products integrate a fixed frequency

current mode controller with a 700 V MOSFET. Available in a

PDIP−7 or SOT−223 package, the NCP1072/5 offer a high level of

integration, including soft−start, frequency−jittering, short−circuit

protection, skip−cycle, a maximum peak current set point, ramp

compensation, and a Dynamic Self−Supply (eliminating the need for

an auxiliary winding).

Unlike other monolithic solutions, the NCP1072/5 is quiet by

nature: during nominal load operation, the part switches at one of the

available frequencies (65, 100 or 130 kHz). When the output power

demand diminishes, the IC automatically enters frequency foldback

mode and provides excellent efficiency at light loads. When the power

demand reduces further, it enters into a skip mode to reduce the

standby consumption down to a no load condition.

Protection features include: a timer to detect an overload or a

short−circuit event, Overvoltage Protection with auto−recovery and

AC input line voltage detection.

For improved standby performance, the connection of an auxiliary

winding stops the DSS operation and helps to reduce input power

consumption below 50 mW at high line.

http://onsemi.com

MARKING

DIAGRAMS

SOT−223

ST SUFFIX

CASE 318E

AYW

107xyG

G

1

PDIP−7

P SUFFIX

CASE 626A

P107xPyyy

AWL

YYWWG

x

= Current Limit (2 or 5)

y

= Oscillator Frequency

=A (65 kHz), B (100 kHz), C (130 kHz)

yyy = 065, 100, 130

A

= Assembly Location

WL = Wafer Lot

Y, YY = Year

W, WW = Work Week

G or G = Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 24 of this data sheet.

Features

• Built−in 700 V MOSFET with RDS(on) of 11 W

• Large Creepage Distance Between High−voltage Pins

• Current−Mode Fixed Frequency Operation – 65 / 100 /

130 kHz (NCP1072 130 kHz on demand only)

• Peak Current: NCP1072 with 250 mA and NCP1075

with 450 mA

• Fixed Ramp Compensation

• Skip−Cycle Operation at Low Peak Currents Only: No

Acoustic Noise!

• Dynamic Self−Supply: No Need for an Auxiliary

Winding

• Internal 1 ms Soft−Start

• Auto−Recovery Output Short Circuit Protection with

Timer−Based Detection

• Auto−Recovery Overvoltage Protection with Auxiliary

Winding Operation

• Frequency Jittering for Better EMI Signature, Including

Frequency Foldback Mode

• No Load Input Consumption < 50 mW

• Frequency Foldback to Improve Efficiency at Light

Load

• Internal Temperature Shutdown

• These are Pb−Free Devices

Typical Applications

• Auxiliary / Standby Isolated Power Supplies White

Goods / Smart Meter / E−Meter

© Semiconductor Components Industries, LLC, 2012

1

November, 2012 − Rev. 2

Publication Order Number:

NCP1072/D

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