Datasheet Texas Instruments UCC28740DR — Ficha de datos

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SLUSBF3C – JULY 2013 – REVISED JULY 2017 UCC28740 Constant-Voltage Constant-Current Flyback Controller Using Optocoupled
Feedback
1 Features 3 Description The UCC28740 isolated-flyback power-supply
controller provides Constant-Voltage (CV) using an
optical coupler to improve transient response to largeload steps. Constant-Current (CC) regulation is
accomplished through Primary-Side Regulation (PSR)
techniques. This device processes information from
opto-coupled feedback and an auxiliary flyback
winding for precise high-performance control of
output voltage and current. 1 Less than 10-mW No-Load Power Capability
Optocoupled Feedback for CV, and
Primary-Side Regulation (PSR) for CC
Enables В±1% Voltage Regulation and В±5%
Current Regulation Across Line and Load
700-V Startup Switch
100-kHz Maximum Switching Frequency Enables
High-Power-Density Charger Designs …