UCC28710_14 Datasheet, PDF (1/32 Pages) Texas Instruments – Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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UCC28710, UCC28711
UCC28712, UCC28713
UCC28714, UCC28715
SLUSB86 – NOVEMBER 2012
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
Check for Samples: UCC28710, UCC28711, UCC28712, UCC28713, UCC28714, UCC28715
FEATURES
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• < 10-mW No-Load Power
• Primary-Side Regulation (PSR) Eliminates
Opto-Coupler
• ±5% Voltage and Current Regulation Across
Line and Load
• 700-V Start-Up Switch
• 100-kHz Maximum Switching Frequency
Enables High-Power Density Charger Designs
• Quasi-Resonant Valley-Switching Operation
for Highest Overall Efficiency
• 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)
• NTC Resistor Interface (UCC28711, UCC28712
and UCC28713) with Fixed Cable
Compensation Options
• SOIC-7 Package
SIMPLIFIED APPLICATION
V_AC
V_AUX
UCC28710
VDD HV
VS DRV
CBC CS
GND
V_OUT
UDG-12200
APPLICATIONS
• USB-Compliant Adapters and Chargers for
Consumer Electronics
– Smart phones
– Tablet computers
– Cameras
• Standby Supply for TV and Desktop
• White Goods
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.
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.
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.
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.
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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