Texas Instruments UCC28750EVM-071

Overview

UCC28750EVM-071 from Texas Instruments is a 60-W AC/DC evaluation module designed to demonstrate and validate the UCC287502 constant-voltage flyback controller in isolated offline power supply applications. It accepts 85–265 V_RMS input, delivers regulated 24 V ±5% output at up to 2.5 A, achieves >90% peak efficiency, supports CCM/DCM operation via programmable slope compensation, and includes comprehensive protection (OVP, OCP, OTP, OPP, brown-out).

For engineers reviewing the UCC28750EVM-071 datasheet, UCC28750EVM-071 test setup, UCC28750EVM-071 hardware design files, or UCC28750EVM-071 application notes, this EVM provides validated reference schematics, BOM, layout, and performance data for rapid prototyping of 24-V, 60-W isolated flyback converters targeting industrial, appliance, and battery-charger systems.

Technical Context

The UCC28750EVM-071 implements a valley-switching, opto-coupled feedback flyback topology using the UCC287502DBV controller. It operates across universal AC input (47–63 Hz), employs frequency foldback and burst mode for light-load efficiency, and uses dithered gate drive to ease EMI compliance.

Hardware features include a 1-mH coupled inductor (L2), 22-µH primary-side inductor (L1, shorted for best efficiency), IPP65R190C7 700-V MOSFET, TL431AIDBZR shunt regulator, and TCMT1107 optocoupler. Protection functions are implemented via dedicated pins (FLT, CS, OPP) with latch/auto-restart options.

Key Specifications

Availability

UCC28750EVM-071 is available at Aetrix Electronics and suitable for industrial AC/DC power supply development, battery charger validation, and DIN-rail PSU prototyping requiring stable component supply, traceable sourcing, and documented reference designs.

Supply support for UCC28750EVM-071 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.

The UCC28750EVM-071 belongs to TI's high-efficiency offline AC/DC evaluation platform family, engineered to accelerate design-in of constant-voltage flyback converters for cost-sensitive, safety-critical, and energy-efficient power systems.

FAQ

What is the primary function of the UCC28750EVM-071?

The UCC28750EVM-071 is a fully assembled, tested evaluation module that demonstrates the UCC287502 constant-voltage flyback controller in a 60-W, 24-V isolated AC/DC converter. It is not an end-product but a lab tool for validating performance, verifying layout, and accelerating system-level testing of flyback-based power supplies before custom design.

Does the UCC28750EVM-071 support both continuous and discontinuous conduction modes?

Yes, the UCC28750EVM-071 supports both CCM and DCM operation through programmable slope compensation implemented in the UCC287502DBV controller. This flexibility allows optimization for efficiency, EMI, and transformer size across varying load and input conditions.

What safety precautions apply when operating the UCC28750EVM-071?

The UCC28750EVM-071 exposes hazardous voltages (>50 V_AC/75 V_DC) on primary-side nodes and reaches component temperatures >55°C. Users must follow TI's HV EVM safety guidelines: de-energize before probing, use insulated tools and 600-V probes, maintain barriers, and ensure qualified supervision during energized testing.

Can the UCC28750EVM-071 be used for battery charging applications?

Yes - the UCC28750EVM-071 delivers regulated 24 V ±5% at up to 2.5 A and includes programmable current limiting and protection features (OCP, OPP, OTP) suitable for constant-voltage battery charging stages. Its fast load transient response and low standby power also align with smart charger requirements.

Where can I find the schematic, BOM, and layout files for the UCC28750EVM-071?

All hardware design files for the UCC28750EVM-071 - including full schematic (Figure 4-1), bill of materials (Table 4-1), top/bottom assembly drawings (Figures 4-2 & 4-3), and PCB layout guidance - are published in the official SLUUCW5 User's Guide, available for download from ti.com.