UCC28710_15 Datasheet, PDF (1/34 Pages) Texas Instruments – Constant-Voltage, Constant-Current Controller

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UCC28710, UCC28711, UCC28712, UCC28713, UCC28714, UCC28715, UCC28716
SLUSB86B – NOVEMBER 2012 – REVISED JULY 2015
UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
1 Features
•1 < 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
2 Applications
• USB-Compliant Adapters and Chargers for
Consumer Electronics
– Smart Phones
– Tablet Computers
– Cameras
• Standby Supply for TV and Desktop
• White Goods
Simplified Application
V_AC
V_AUX
UCC28710
VDD HV
VOUT
3 Description
The UCC2871x 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.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
UCC28710
UCC28711
UCC28712
UCC28713
SOIC (7)
4.91 mm × 3.90 mm
UCC28714
UCC28715
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
VS DRV
CBC CS
GND
UDG-12200
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.