NCP1070_16 Datasheet, PDF (1/30 Pages) ON Semiconductor – High-Voltage Switcher for Low Power Offline SMPS

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 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,
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
1
April, 2016 − Rev. 7
Publication Order Number:
NCP1070/D