© Semiconductor Components Industries, LLC, 2017
February, 2017 − Rev. 6
1 Publication Order Number:
NCP1339/D
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, H, I and J versions
• Ready for High−Density QR design (F, G, H, I and J versions)
• These Devices are Pb−Free and are RoHS Compliant
SOIC−14 NB
(LESS PIN 13)
D SUFFIX
CASE 751AN
MARKING DIAGRAM
www.onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 31 of this data sheet.
ORDERING INFORMATION
1
14
NCP1339xG
AWLYWW
1
14
NCP1339 = Specific Device Code
x = C, D, E, F, G, H, I or J
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
HV
NC
NC
VCC
DRV
GND
X2
OPP
ZCD
Fault
FB
CS
REM
(For C, D, E, F, G, and H versions)
HV
NC
IFF
VCC
DRV
GND
X2
OPP
ZCD
Fault
FB
CS
REM
(For I and J versions)
