Product Overview

Product Overview
NCP1336: Controller, Quasi-Resonant, Current Mode, with HV Start-Up
For complete documentation, see the data sheet
Product Description
The NCP1336 hosts a high-performance circuitry aimed to powering quasi-resonant converters. Capitalizing on a novel 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 drain-source valley. This system works down to the 4th 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. Safety-wise, an adjustable timer relies on the feedback voltage to detect a fault. On version B, this fault triggers a triplehiccup 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.
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 ot performa an accurate Over voltage Protection.
Finally, a brownout pin whcih stops the circuit operation in presence of a low mains condition is included.
Features
Benefits
• Valley Switching Operation with Valley-Lockout
• Loss-free Adjustable Over Power Protection
• Auto-recovery or Latched Short-Circuit Protection with
adjustable timer
• Dedicated Overtemperature Protection Input
• Brown Out Protection
• High voltage startup current source
• Improved efficiency with noise immunity
• Limits the peak current according to input line voltage
• Versatile short circuit protection for improved reliability
• Allows direct connection to NTC for accurate OTP
• Protects against drops in input mains voltage
• Provides a quick and lossless power-on sequence
Applications
End Products
• High Power Ac-Dc converters
• Notebook Adapters
• Flat TV SMPS
Part Electrical Specifications
Product
Compliance
Status
Topolog
y
Control
Mode
fsw Typ
(kHz)
StandUVLO
by Mode (V)
Short
Circuit
Protecti
on
Latch
Soft
Start
VCC Max Drive
(V)
Cap.
(mA)
Packag
e Type
NCP1336ADR2G
Pb-free
Active
Flyback
Current
Mode
Variable
Yes
9 - 15
Yes
Yes
Yes
28
500 /
800
SOIC14 NB
Active
Flyback
Current
Mode
Variable
Yes
9 - 15
Yes
Yes
Yes
28
500 /
800
SOIC14 NB
Halide free
NCP1336BDR2G
Pb-free
Halide free
Application Diagram
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016