NCP1336A Datasheet, PDF (1/26 Pages) ON Semiconductor – Quasi-Resonant Current Mode Controller for High Power Universal Off-Line Supplies

NCP1336A/B
Quasi-Resonant Current
Mode Controller for High
Power Universal Off-Line
Supplies
The NCP1336 hosts a high−performance circuitry aimed to
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powering quasi−resonant converters. Capitalizing on a novel
QUASI−RESONANT PWM
valley−lockout system, the controller shifts gears and reduces the
CONTROLLER FOR HIGH POWER
switching frequency as the power loading becomes lighter. This
AC−DC WALL ADAPTERS
results in a stable operation despite switching events always occurring
in the drain−source valley. This system works down to the 4^th valley
and toggles to a variable frequency mode beyond, ensuring an
excellent standby power performance.
The controller takes benefit of a high−voltage start−up current
source to provide a quick and lossless power−on sequence. To improve
the safety in overload situations, the controller includes an Over Power
Protection circuit which clamps the delivered power at high−line.
14
1
SO−14
CASE 751AN
SUFFIX O
MARKING
DIAGRAM
14
NCP1336x
AWLYWWG
1
Safety−wise, an adjustable timer relies on the feedback voltage to
detect a fault. On version B, this fault triggers a triple−hiccup on the
VCC pin which naturally reduces the average input power drawn by
the converter. On version A, when a fault is detected, the controller is
latched−off.
A
= Assembly Location
x
= A or B
WL = Wafer Lot
Y
= Year
WW = Work Week
G
= Pb−Free Package
Particularly well suited for adapter applications, the controller
features two latch inputs: one dedicated to Over Temperature
protection (OTP) which offers an easy means to connect a pull−down
temperature sensor like an NTC, and a second one more classical that
can be used to perform an accurate Over Voltage Protection.
PIN CONNECTIONS
OPP
HV
OTP
Timer
OVP
ZCD
BO
Finally, a brownout pin which stops the circuit operation in presence
of a low mains condition is included.
Ct
VCC
FB
DRV
CS
GND
Features
• Quasi−Resonant Peak Current−Mode Control Operation
• Valley Switching Operation with Valley−Lockout for Noise−Immune
Operation
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 25 of this data sheet.
• Internal 5 ms Soft−Start
• Loss−Free Adjustable Over Power Protection
• Auto−Recovery or Latched Internal Output Short− Circuit Protection
• Adjustable Timer for Improved Short−Circuit Protection
• Overvoltage and Overtemperature Protection Inputs
• Brownout Input
• Extremely Low No−Load and Standby Power
• −500 mA/+800 mA Peak Current Source/Sink
• SO14 Package
Capability
• Internal Temperature Shutdown
• Direct Optocoupler Connection
• 3 ms Blanking Delay to Ignore Leakage Ringing at
• These are Pb−Free Devices
• This Device uses Halogen−Free Molding Compound
Typical Applications
• High Power ac−dc Converters for TVs, Set−Top Boxes etc
Turn−Off
• Offline Adapters for Notebooks
© Semiconductor Components Industries, LLC, 2012
1
July, 2012 − Rev. 0
Publication Order Number:
NCP1336/D