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NCP1071

Description
SWITCHING CONTROLLER
Categorysemiconductor    Analog mixed-signal IC   
File Size801KB,30 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
Download Datasheet Parametric View All

NCP1071 Overview

SWITCHING CONTROLLER

NCP1071 Parametric

Parameter NameAttribute value
stateACTIVE
Analog IC other typesswitch controller
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.
Features
www.onsemi.com
MARKING
DIAGRAMS
SOT−223
ST SUFFIX
CASE 318E
1
AYW
z07xyG
G
PDIP−7
P SUFFIX
CASE 626A
P107xfyyy
AWL
YYWWG
Built−in 700 V MOSFET with R
DS(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
ORDERING INFORMATION
800 mA
See detailed ordering and shipping information on page 28 of
this data sheet.
Fixed Ramp Compensation
Skip−Cycle Operation at Low Peak Currents Only: No Acoustic
Noise!
Dynamic Self−Supply: No Need for an Auxiliary
No Load Input Consumption < 50 mW
Winding
Frequency Foldback to Improve Efficiency at Light
Internal 1 ms Soft−Start
Load
Auto−Recovery Output Short Circuit Protection with
Internal Temperature Shutdown
Timer−Based Detection
These are Pb−Free Devices
Auto−Recovery Overvoltage Protection with Auxiliary
Typical Applications
Winding Operation
Auxiliary / Standby Isolated Power Supplies White
Frequency Jittering for Better EMI Signature, Including
Goods / Smart Meter / E−Meter
Frequency Foldback Mode
= 1 for Std product; V for Automotive
= Current Limit (0, 1, 2, 5, 6 or 7)
= Oscillator Frequency
=
A (65 kHz), B (100 kHz), C (130 kHz)
yyy
= 065, 100, 130
f
= OFF phase in fault mode
=
P (420 ms), B (210 ms)
A
= Assembly Location
WL
= Wafer Lot
Y, YY
= Year
W, WW = Work Week
G or
G
= Pb−Free Package
Z
x
y
©
Semiconductor Components Industries, LLC, 2016
1
March, 2018 − Rev. 9
Publication Order Number:
NCP1070/D

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