UCC28740EVM-525

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Texas Instruments

EVAL BOARD FOR UCC28740

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UCC28740EVM-525

Active

Texas Instruments

EVAL BOARD FOR UCC28740

Deep-Dive with AI

DocumentsDatasheet

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UCC28740EVM-525

Board Type	Fully Populated
Current - Output	2.1 A
Main Purpose	Primary Side, AC/DC
Outputs and Type	Isolated
Outputs and Type	1
Power - Output	10 W
Regulator Topology	Flyback
Supplied Contents	Board(s)
Voltage - Input [Max]	265 VAC
Voltage - Input [Min]	85 VAC
Voltage - Output	5 V

UCC28740 Series

Constant-Voltage, Constant-Current (CVCC) Flyback controller with Secondary Side Regulation (SSR)

Part	Main Purpose	Voltage - Output	Regulator Topology	Voltage - Input [Min]	Voltage - Input [Max]	Current - Output	Supplied Contents	Board Type	Power - Output	Outputs and Type	Outputs and Type	Fault Protection	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Internal Switch(s)	Output Isolation	Topology	Voltage - Start Up	Package / Case [custom]	Package / Case	Package / Case [custom]	Package / Case	Frequency - Switching [Max]	Frequency - Switching [Min]	Mounting Type	Supplier Device Package
Texas Instruments UCC28740EVM-525	AC/DC Primary Side	5 V	Flyback	85 VAC	265 VAC	2.1 A	Board(s)	Fully Populated	10 W	Isolated	1
Texas Instruments UCC28740DR												Current Limiting Over Voltage	-40 °C	125 ¯C	35 V	9 V		Isolated	Flyback	21 V	7	8-SOIC	3.9 mm	0.154 in	100 kHz	170 Hz	Surface Mount	7-SOIC

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Box	1	$ 58.80

Description

General part information

UCC28740 Series

The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load 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.

An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response.

Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output 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.

Documents

Technical documentation and resources