UCC28710, UCC28711
UCC28712, UCC28713
UCC28714, UCC28715
www.ti.com
SLUSB86 –NOVEMBER 2012
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
Check for Samples: UCC28710, UCC28711, UCC28712, UCC28713, UCC28714, UCC28715
1
FEATURES
APPLICATIONS
•
•
< 10-mW No-Load Power
•
USB-Compliant Adapters and Chargers for
Consumer Electronics
Primary-Side Regulation (PSR) Eliminates
Opto-Coupler
–
–
–
Smart phones
Tablet computers
Cameras
•
±5% Voltage and Current Regulation Across
Line and Load
•
•
700-V Start-Up Switch
•
•
Standby Supply for TV and Desktop
White Goods
100-kHz Maximum Switching Frequency
Enables High-Power Density Charger Designs
•
Quasi-Resonant Valley-Switching Operation
for Highest Overall Efficiency
DESCRIPTION
The UCC28710 family of flyback power supply
controllers provides isolated-output Constant-Voltage
(CV) and Constant-Current (CC) output regulation
without the use of an optical coupler. The devices
process information from the primary power switch
and an auxiliary flyback winding for precise control of
output voltage and current.
•
•
•
•
Frequency Jitter to Ease EMI Compliance
Wide VDD Range Allows Small Bias Capacitor
Clamped Gate-Drive Output for MOSFET
Overvoltage, Low-Line, and Overcurrent
Protection Functions
•
•
Programmable Cable Compensation
(UCC28710, UCC28714 and UCC28715)
An internal 700-V start-up switch, dynamically-
controlled operating states and a tailored modulation
profile support ultra-low standby power without
sacrificing start-up time or output transient response.
NTC Resistor Interface (UCC28711, UCC28712
and UCC28713) with Fixed Cable
Compensation Options
Control algorithms in the UCC28710 family allow
operating efficiencies to meet or exceed applicable
standards. The output drive interfaces to a MOSFET
power switch. Discontinuous conduction mode (DCM)
with valley switching reduces switching losses.
Modulation of switching frequency and primary
current peak amplitude (FM and AM) keeps the
conversion efficiency high across the entire load and
line ranges.
•
SOIC-7 Package
SIMPLIFIED APPLICATION
VOUT
–
VAC
The controllers have a maximum switching frequency
of 100 kHz and always maintain control of the peak-
primary current in the transformer. Protection features
help keep primary and secondary component
stresses in check. The UCC28710, UCC28714 and
UCC28715 allow the cable compensation to be
programmed. The UCC28711, UCC28712 and
UCC28713 devices allow remote temperature
sensing using a negative temperature coefficient
(NTC) resistor while providing fixed cable-
compensation levels.
UCC28710
VAUX
VDD
HV
VS
DRV
CS
CBC
GND
UDG-12200
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated
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