Texas Instruments UCC28742DBVR

Name: UCC28742DBVR
Brand: Texas Instruments
SKU: 6401674-UCC28742DBVR
Availability: InStock
Rating: 5 (1 reviews)

Part Number:: UCC28742DBVR

Manufacturer:: Texas Instruments

Ventron No:: 6401674-UCC28742DBVR

Description:: High-Efficiency Flyback Controller with 1% Output regulation accuracy

ECAD Model:

Datasheet:: ucc28742

Specifications

Texas Instruments UCC28742DBVR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments UCC28742DBVR.

Topology
Flyback
Control mode
Secondary-side regulation
Duty cycle (max) (%)
99
Switching frequency (max) (kHz)
105
Features
Current limiting
UVLO thresholds on/off (V)
22/7.7
Operating temperature range (°C)
-40 to 125
Rating
Catalog
Gate drive (typ) (A)
0.03

Description

The UCC28742 off-line flyback controller is a highly integrated, 6-pin secondary-sideregulated PWM controller for efficient AC-to-DC power supplies. It is an isolated-flybackpower-supply controller that provides Constant-Voltage (CV) using an optical coupler to improvetransient response to large-load steps. This device processes information from opto-coupledfeedback and an auxiliary flyback winding for high-performance control of output voltage andcurrent.

The UCC28742 employs advanced control algorithms to achieve high operating efficiency andperformance. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode(DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primarycurrent-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load andline ranges.

The controller has a maximum switching frequency of 80 kHz and always maintains controlof the peak-primary current in the transformer. A minimum switching frequency of 200 Hz facilitatesthe achievement of low no-load input power.

Certification