Datasheet Texas Instruments UCC28720DR — Ficha de datos

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SLUSBE8B – MAY 2013 – REVISED SEPTEMBER 2015 UCC28720 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
1 Features 3 Description The UCC28720 flyback power supply controller
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. 1 < 10-mW No-Load Power
Primary-Side Regulation (PSR) Eliminates OptoCoupler
В±5% Voltage and Current Regulation Across Line
and Load
700-V Start-Up Switch
80-kHz Maximum Switching Frequency Enables
High-Power Density Charger Designs
Quasi-Resonant Valley-Switching Operation for
Highest Overall Efficiency
Wide VDD Range Allows Small Bias Capacitor …