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  ON Semiconductor Electronic Components Datasheet  

NCP1072 Datasheet

High-Voltage Switcher

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NCP1070, NCP1071,
NCP1072, NCP1075,
NCP1076, NCP1077
High-Voltage Switcher for
Low Power Offline SMPS
The NCP107x products integrate a fixed frequency current mode
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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
MARKING
DIAGRAMS
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
SOT−223
ST SUFFIX
CASE 318E
AYW
107xyG
G
1
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
PDIP−7
P SUFFIX
CASE 626A
P107xfyyy
AWL
YYWWG
AC input line voltage detection.
For improved standby performance, the connection of an auxiliary
x = Current Limit (0, 1, 2, 5, 6 or 7)
winding stops the DSS operation and helps to reduce input power
consumption below 50 mW at high line.
y = Oscillator Frequency
= A (65 kHz), B (100 kHz), C (130 kHz)
yyy = 065, 100, 130
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,
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
NCP1075 with 450 mA, NCP1076 with 650 mA and NCP1077 with
800 mA
ORDERING INFORMATION
Fixed Ramp Compensation
Skip−Cycle Operation at Low Peak Currents Only: No Acoustic
See detailed ordering and shipping information on page 28 of
this data sheet.
Noise!
Dynamic Self−Supply: No Need for an Auxiliary Winding
Internal 1 ms Soft−Start
Frequency Foldback to Improve Efficiency at Light
Auto−Recovery Output Short Circuit Protection with
Timer−Based Detection
Load
Internal Temperature Shutdown
Auto−Recovery Overvoltage Protection with Auxiliary
These are Pb−Free Devices
Winding Operation
Frequency Jittering for Better EMI Signature, Including
Frequency Foldback Mode
No Load Input Consumption < 50 mW
Typical Applications
Auxiliary / Standby Isolated Power Supplies White
Goods / Smart Meter / E−Meter
© Semiconductor Components Industries, LLC, 2016
April, 2016 − Rev. 7
1
Publication Order Number:
NCP1070/D


  ON Semiconductor Electronic Components Datasheet  

NCP1072 Datasheet

High-Voltage Switcher

No Preview Available !

NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077
PIN CONNECTIONS
VCC 1
8 GND
VCC
1
2 7 GND
FB 2
4 GND
GND 3
FB 4
(Top View)
PDIP−7
5 DRAIN
DRAIN
3
(Top View)
SOT−223
Figure 1. Pin Connections
INDICATIVE MAXIMUM OUTPUT POWER
NCP1070 / 1071
RDS(on) − IIPK
22 W − 350 mA
NCP1072 / 1075
11 W − 450 mA
NCP1076 / 1077
4.7 W − 800 mA
230 Vac
14 W
19 W
25 W
85−265 Vac
7.75 W
10 W
15 W
NOTE: Informative values only, with Tamb = 50°C, FSW = 65 kHz, Self supply via Auxiliary winding and circuit mounted on minimum
copper area as recommended.
QUICK SELECTION TABLE
NCP1070
NCP1071
RDS(on) (W)
Ipeak (mA)
22
250 350
Freq (kHz) 65 100 130 65 100 130
*130 kHz on demand only
NCP1072
NCP1075
11
250 450
65 100 130* 65 100 130
NCP1076
NCP1077
4.7
650 800
65 100 130 65 100 130
Figure 2. Typical Application Example
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2


Part Number NCP1072
Description High-Voltage Switcher
Maker ON Semiconductor
Total Page 30 Pages
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