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NCP1027 Datasheet(PDF) 1 Page - ON Semiconductor

Part No. NCP1027
Description  High−Voltage Switcher for Medium Power Offline SMPS Featuring Low Standby Power
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1027 Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2006
December, 2006 − Rev. 3
1
Publication Order Number:
NCP1027/D
NCP1027
High−Voltage Switcher
for Medium Power Offline
SMPS Featuring Low
Standby Power
The NCP1027 offers a new solution targeting output power levels
from a few watts up to 15 W in a universal mains flyback application.
Our proprietary high−voltage technology lets us include a power
MOSFET together with a startup current source, all directly
connected to the bulk capacitor. To prevent lethal runaway in low
input voltage conditions, an adjustable brown−out circuitry blocks
the activity until sufficient input level is reached.
Current−mode operation together with an adjustable ramp
compensation offers superior performance in universal mains
applications. Furthermore, an Over Power Protection pin brings the
ability to precisely compensate all internal delays in high input voltage
conditions and optimize the maximum output current capability.
Protection wise, a timer detects an overload or a short−circuit and
stops all operations, ensuring a safe auto−recovery, low duty cycle burst
operation. An integrated, auto−recovery, Overvoltage Protection
permanently monitors the VCC level and temporarily shuts down the
driving pulses in case of an unexpected feedback loop runaway.
Finally, a great RDS(on) figure makes the circuit an excellent choice
for standby/auxiliary offline power supplies or applications requiring
higher output power levels.
Features
Built−in 700 V MOSFET with Typical RDS(on) of 5.8 W, TJ = 25°C
Current−Mode Fixed Frequency Operation: 65 kHz and 100 kHz
Fixed Peak Current of 800 mA
Skip−Cycle Operation at Low Peak Currents
Internal Current Source for Clean and Lossless Startup Sequence
Auto−Recovery Output Short Circuit Protection with Timer−Based
Detection
Auto−Recovery Overvoltage Protection with Auxiliary Winding
Operation
Programmable Brown−Out Input for Low Input Voltage Detection
Programmable Over Power Protection
Input to Permanently Latchoff the Part
Internal Frequency Jittering for Improved EMI Signature
Extended Duty Cycle Operation to 80% Typical
No−Load Input Standby Power of 85 mW @ 265 Vac
500 mW Loaded, Input Power of 715 mW @ 230 Vac
These are Pb−Free Devices
Typical Applications
Medium Power AC−DC Adapters for Chargers
Auxiliary/Standby Power Supplies for ATX and TVS Power Supplies
Reference
230 VAC
90−265 VAC
NCP1027 − 5.8
W
25 W*
15 W*
*Typical values, open−frame, 65 kHz version, RqJA < 75°C/W, TA = 50°C.
8−LEAD PDIP
P SUFFIX
CASE 626A
PIN CONNECTIONS
Device
Package
Shipping*
ORDERING INFORMATION
NCP1027P065G
PDIP−8
(Pb−Free)
50 Units / Rail
http://onsemi.com
MARKING
DIAGRAM
XXX = 65 or 100
A
= Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G
= Pb−Free Package
(Top View)
Ramp Comp.
VCC
Brown−Out
FB
Drain
P1027PXXX
AWL
YYWWG
GND
OPP
*For additional information on our Pb−Free strategy
and
soldering
details,
please
download
the
ON
Semiconductor
Soldering
and
Mounting
Techniques Reference Manual, SOLDERRM/D.
NCP1027P100G
PDIP−8
(Pb−Free)
50 Units / Rail


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