NCP1339 Datasheet, PDF (1/31 Pages) ON Semiconductor – High-Voltage, Quasi-Resonant Controller featuring Valley Lock-Out

NCP1339
High-Voltage, Quasi-
Resonant Controller
featuring Valley Lock-Out
and Power Saving Mode
The NCP1339 is a highly integrated quasi−resonant flyback
controller capable of controlling rugged and high−performance
off−line power supplies as required by adapter applications. With an
integrated active X−cap discharge feature and power savings mode,
the NCP1339 can enable no−load power consumption below 10 mW
for 45 W notebook adapters.
The quasi−resonant current−mode flyback stage features a
proprietary valley−lockout circuitry, ensuring stable valley switching.
This system works down to the 6^th valley and toggles to a frequency
foldback mode to eliminate switching losses. When the loop tends to
force below 25−kHz frequencies, the NCP1339 skips cycles to contain
the power delivery.
To help build rugged converters, the controller features several key
protective features: an internal brown−out, a non−dissipative Over
Power Protection for a constant maximum output current regardless of
the input voltage, a latched over−voltage protection through a
dedicated pin.
Features
• High−voltage Current Source for Lossless Start−up Sequence
• X2 Capacitors Discharge Capability
• Power Savings Mode (PSM) for Extremely Low No−Load Power:
• Wide V_CC Range from 10 V to 28 V
• Latching−off 28−V V_CC Over−Voltage Protection
• Abnormal Overcurrent Fault Protection for Winding Short Circuit or
Inductor Saturation Detection
• Integrated High−Voltage Startup Circuit with Brown−Out Detection
• Fault Input for Severe Fault Conditions, NTC Compatible for OTP
• Circuit Latching Off In Severe Fault Detection (OVP or OTP)
• Internal Temperature Shutdown
• Valley Switching Operation with Valley−Lockout for Noise−Free
Operation
• Frequency Fold−back for Highest Performance in Standby Mode
• 25−kHz Clamp and Skip Mode
• Timer−Based Overload Protection (Latched or Auto−Recovery
Options)
• Adjustable Overpower Protection
• 4−ms Soft−Start Timer
• ZCD Blanking Time to Ignore Leakage Ringing at Turn−Off:
3 ms for C, D and E versions and 0.7 ms for F, G or H versions
• These Devices are Pb−Free and are RoHS Compliant
This document contains information on some products that are still under development.
ON Semiconductor reserves the right to change or discontinue these products without
notice.
www.onsemi.com
14
1
SOIC−14 NB
(LESS PIN 13)
D SUFFIX
CASE 751AN
MARKING DIAGRAM
14
NCP1339xG
AWLYWW
1
NCP1339 = Specific Device Code
x
= C, D, E, F, G or H
A
= Assembly Location
WL = Wafer Lot
Y
= Year
WW = Work Week
G
= Pb−Free Package
PIN CONNECTIONS
X2
REM
OPP
ZCD
Fault
FB
CS
HV
NC
NC
VCC
DRV
GND
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 30 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
1
August, 2015 − Rev. 3
Publication Order Number:
NCP1339/D