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NCP1239ID65R2G

Description
Switch controller NCP1239I 65KHZ
Categorysemiconductor    Power management IC    Voltage regulator and the voltage controller    Switch controller   
File Size310KB,27 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
Environmental Compliance
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NCP1239ID65R2G Overview

Switch controller NCP1239I 65KHZ

NCP1239ID65R2G Parametric

Parameter NameAttribute value
MakerON Semiconductor
Product Categoryswitch controller
TopologyFlyback
Number of outputs1 Output
On-off level65 kHz
Duty Cycle - Max84 %
Input voltage35 V
The output voltage13.5 V
Output current500 mA
Minimum operating temperature- 40 C
Maximum operating temperature+ 125 C
Installation styleSMD/SMT
Package/boxSOIC-7
EncapsulationCut Tape
EncapsulationReel
insulationNon-Isolated
productFixed Frequency Current-Mode Controller
closureShutdown
development kitNCP1239B65WGEVB
Fall time30 ns
Working power current1.4 mA
Working power voltage8.8 V to 35 V
Rise Time40 ns
Factory packaging quantity2500
NCP1239
Fixed Frequency
Current‐Mode Controller for
Flyback Converter
The NCP1239 is a fixed-frequency current-mode controller
featuring a high-voltage start-up current source to provide a quick and
lossless power-on sequence. This function greatly simplifies the
design of the auxiliary supply and the V
CC
capacitor by activating the
internal start-up current source to supply the controller during start-up,
transients, latch, stand-by etc.
With a supply range up to 35 V, the controller hosts a jittered 65 or
100-kHz switching circuitry operated in peak current mode control.
When the power on the secondary side starts to decrease, the controller
automatically folds back its switching frequency down to minimum
level of 26 kHz. As the power further goes down, the part enters skip
cycle while limiting the peak current that insures excellent efficiency
in light load condition.
NCP1239 features a timer-based fault detection circuitry that
ensures a quasi-flat overload detection, independent of the input
voltage.
Features
www.onsemi.com
SOIC−7
CASE 751U
PIN CONNECTIONS
Fault
FB
CS
GND
1
2
3
4
6
5
8
HV
VCC
DRV
Fixed-Frequency 65-kHz or 100-kHz Current-Mode Control
Operation
Frequency Foldback Down to 26 kHz and Skip Mode to
Maximize Performance in Light Load Conditions
Adjustable Over Power Protection (OPP) Circuit
High-Voltage Current Source with Brown-Out (BO) Detection
Internal Slope Compensation
Internal Fixed Soft-Start
Frequency Jittering in Normal and Frequency Foldback Modes
64-ms Timer-Based Short-Circuit Protection with Auto-Recovery
or Latched Operation
Pre-Short Ready for Latched OCP Versions
Latched OVP on VCC – Autorecovery for C and E Versions
Latched OVP/OTP Input for Improved Robustness
35-V V
CC
Operation
±500
mA Peak Source/Sink Drive Capability
Internal Thermal Shutdown
Extremely Low No-Load Standby Power
Pin-to-Pin Compatible with the Existing NCP1236/1247 Series
These Devices are Pb-Free and are RoHS Compliant
MARKING DIAGRAM
8
1239xfff
ALYWX
G
1
1239xfff = Specific Device Code
x
= A, B, C, D, E, F, G, H, I, J, K, L, M or N
fff = 065 or 100
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 25 of
this data sheet.
Typical Applications
AC-DC Converters for TVs, Set-Top Boxes and Printers
Offline Adapters for Notebooks and Netbooks
©
Semiconductor Components Industries, LLC, 2016
December, 2018
Rev. 19
1
Publication Order Number
NCP1239/D

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