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شماره قطعه NCP1380
شرح مفصل Quasi-Resonant Current Mode Controller
تولید کننده ON Semiconductor 
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NCP1380 شرح
NCP1380
Quasi-Resonant
Current-Mode Controller for
High-Power Universal
Off-Line Supplies
The NCP1380 hosts a highperformance circuitry aimed to
powering quasiresonant converters. Capitalizing on a proprietary
valleylockout system, the controller shifts gears and reduces the
switching frequency as the power loading becomes lighter. This
results in a stable operation despite switching events always occurring
in the drainsource valley. This system works down to the 4th valley
and toggles to a variable frequency mode beyond, ensuring an
excellent standby power performance.
To improve the safety in overload situations, the controller includes
an Over Power Protection (OPP) circuit which clamps the delivered
power at highline. Safetywise, a fixed internal timer relies on the
feedback voltage to detect a fault. Once the timer elapses, the
controller stops and stays latched for option A and C or enters
autorecovery mode for option B and D.
Particularly well suited for adapter applications, the controller
features a pin to implement either a combined overvoltage /
overtemperature protection (Version A and B) or a combined
brownout/overvoltage protection (Version C and D).
Features
QuasiResonant Peak CurrentMode Control Operation
Valley Switching Operation with ValleyLockout for NoiseImmune
Operation
Frequency Foldback at Light Load to Improve the Light Load
Efficiency
www.DataSAhedejtu4sUt.acbolme Over Power Protection
AutoRecovery or Latched Internal Output ShortCircuit Protection
Fixed Internal 80 ms Timer for ShortCircuit Protection
Combined Overvoltage and Overtemperature Protection (A and B
Versions)
Combined Overvoltage Protection and BrownOut (C and D
Versions)
+500 mA / 800 mA Peak Current Source/Sink Capability
Internal Temperature Shutdown
Direct Optocoupler Connection
Extended VCC Range Operation Up to 28 V
Extremely Low NoLoad Standby Power
SO8 Package
These Devices are PbFree and are RoHS Compliant
Typical Applications
High Power acdc Converters for TVs, SetTop Boxes etc.
Offline Adapters for Notebooks
http://onsemi.com
QUASIRESONANT PWM
CONTROLLER FOR HIGH
POWER ACDC WALL
ADAPTERS
8
1
SOIC8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
1380X
ALYWX
G
1
1380X = Specific Device Code
X = Device Option (A, B, C, or D)
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
PIN CONNECTIONS
ZCD 1
FB 2
CS 3
GND 4
8 CT
7 FAULT
6 VCC
5 DRV
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 25 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
December, 2009 Rev. 1
1
Publication Order Number:
NCP1380/D

قانون اساسیصفحه 26
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