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Texas Instruments UCC28780 | Demoboard UCC28780EVM-002
Using the UCC28780EVM-002 45-W 20-V High Density GaN Active-Clamp Flyback Converter
Overview
| Topology | Flyback Converter |
| Input voltage | 90-264 V |
| Switching frequency | 1000 kHz |
| Output 1 | 20 V / 2.25 A |
| IC revision | A |
Description
The UCC28780EVM-002 is a 45-W evaluation module (EVM) for evaluating an off-line active-clamp flyback adapter for notebook charging and other applications. The EVM meets CoC Tier 2 and DoE Level 6 efficiency requirements. It is intended for evaluation purposes and is not intended to be an end product. The UCC28780EVM-002 converts input voltage of 90-VRMS to 264-VRMS down to 20-VDC, with a 2.25-A nominal output current rating and a 160-ms limit for over-power capability. The main devices used in this design are active clamp flyback controller UCC28780, SR controller UCC24612, and GaN MOSFETPower IC NV6117 and NV6115. Please read this user's guide thoroughly before applying power to this board.
Features
- 45-W, 20-V AC-to-DC converter using active-clamp flyback controller, GaN MOSFET Power IC, and synchronous rectification
- High Efficiency (> 94%), High Power Density (> 20W/in3), Low Standby Power (55mW), and High Switching Frequency (300kHz)
- Exceeds EU Code of Conduct and US Department of Energy efficiency requirements
- Adaptive Burst Mode feature maintains high efficiency even at light loads
- This evaluation module is tested and orderable and includes a User's Guide
Typical applications
- AC-to-DC or DC-to-DC Auxiliary Power Supply
- High-Density AC-to-DC Adapters for Notebook, Tablet, TV, Set-Top Box and Printer
- USB Power Delivery, Direct and Fast Mobile Chargers
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | VR(V (AC)) | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | L(mm) | W(mm) | H(mm) | Packaging | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Film Capacitors, Across the mains, 68 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance68 nF | Rated Voltage275 V (AC) | Safety ClassX2 | Rate of Voltage Rise400 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch7.5 mm | Length10 mm | Width6 mm | Height12 mm | PackagingCarton | – | – | – | – | – | – | ||||
 | WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | – | Inductance1 µH | Rated Current8.5 A | Saturation Current @ 10%8.5 A | DC Resistance0.015 Ω | Self Resonant Frequency140 MHz | VersionHeat Shrinking Tube | ||||
| WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | – | Inductance22 µH | Rated Current1.8 A | Saturation Current @ 10%1.7 A | DC Resistance0.13 Ω | Self Resonant Frequency15 MHz | VersionHeat Shrinking Tube |