NCP1071(2014) 查看數據表（PDF） - ON Semiconductor

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NCP1071
(Rev.:2014)

High-Voltage Switcher for Low Power Offline SMPS

ON Semiconductor 

NCP1070, NCP1071,

NCP1072, NCP1075,

NCP1076, NCP1077

High-Voltage Switcher for

Low Power Offline SMPS

The NCP107x products integrate a fixed frequency current mode

controller with a 700 V MOSFET. Available in a PDIP−7 or SOT−223

package, the NCP107x 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 NCP107x 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 (0, 1, 2, 5, 6 or 7)

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

Features

• Built−in 700 V MOSFET with RDS(on) of 4.7 W

(NCP1076/77) / 11 W (NCP1072/75) / 22 W

(NCP1070/71)

• Large Creepage Distance Between High−voltage Pins

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

130 kHz

• Peak Current: NCP1070/72 with 250 mA, NCP1071

with 350 mA, NCP1075 with 450 mA, NCP1076 with

650 mA and NCP1077 with 800 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

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 26 of this data sheet.

• 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, 2014

1

February, 2014 − Rev. 0

Publication Order Number:

NCP1070/D

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