Texas Instruments LM5023 19V 65W Notebook Adapter Evaluation Modul LM5023-2NBEVM LM5023-2NBEVM Scheda Tecnica
Codici prodotto
LM5023-2NBEVM
LM5023
OUT
QR
CS
VCC
GND
COMP
90-264 VAC
Vout
+19V
High
Voltage
Start-up
Output
voltage
regulation
SS
VSD
Depletion
Mode
FET
SNVS961D – APRIL 2013 – REVISED JANUARY 2014
AC-DC Quasi-Resonant Current Mode PWM Controller
1
FEATURES
APPLICATIONS
•
Critical Conduction Mode
•
Universal Input AC-DC Notebook Adapters 10
W to 65 W
W to 65 W
•
Peak Current Mode Control Mode
•
High Efficiency Housekeeping and Auxiliary
•
Skip Cycle Mode for Low Standby Power
Power
•
Hiccup Mode for Continuous Overload
•
Battery Chargers
Protection
•
Consumer Electronics (DVD Players, Set-Top
•
Cycle-by-Cycle Over-Current Protection
Boxes, DTV, Gaming, Printers, etc)
Maintains Accuracy over the Universal AC
Line
Line
DESCRIPTION
•
Line Current Feed Forward
The LM5023 is a Quasi-Resonant Pulse Width
•
OVP Protection by Sensing the Aux Winding
Modulated (PWM) controller which contains all of the
•
Integrated 0.7 A Peak Gate Driver
features needed to implement a highly efficient off-
line power supply. The LM5023 uses the transformer
line power supply. The LM5023 uses the transformer
•
Direct Opto-Coupler Interface
auxiliary winding for demagnetization detection to
•
Leading Edge Blanking of Current Sense
ensure Critical Conduction Mode (CCM) operation.
Signal
The LM5023 features a hiccup mode for over current
•
Maximum Frequency Clamp 130 kHz
protection with an auto restart to reduce the stress on
the power components during an overload. A skip
the power components during an overload. A skip
•
Programmable Soft Start
cycle mode which reduces power consumption at
•
Thermal Shutdown
light loads for energy conservation applications
•
8-Pin MSOP Package
(ENERGY STAR®, CEPCP, etc.). The LM5023 also
uses the transformer auxiliary winding for output
overvoltage (OVP) protection, if an OVP fault is
detected the LM5023 latches off the controller.
uses the transformer auxiliary winding for output
overvoltage (OVP) protection, if an OVP fault is
detected the LM5023 latches off the controller.
SIMPLIFIED SCHEMATIC
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013–2014, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.