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Texas Instruments UCC28780 | Demoboard UCC28780EVM-021
Using the UCC28780EVM-021, 45-W, 20-V High-Density Silicon (Si) Based, Active-Clamp Flyback Converter/Evaluation Module
Overview
| Topology | Flyback Converter |
| Input voltage | 90-264 V |
| Switching frequency | 1000 kHz |
| Output 1 | 20 V / 2.25 A |
Description
The UCC28780EVM-021 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-021 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 Si MOSFETs.
Features
- 45-W, 20-V AC-to-DC converter using active-clamp flyback controller, Si MOSFET Power IC, and synchronous rectification
- High Efficiency (> 94%), High Power Density (> 20W/in3), Low Standby Power (40.1mW), and High Full Load Switching Frequency (291kHz)
- 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
- High-Density AC-to-DC Adapters for Notebook, Tablet, TV, Set-Top Box and Printer
- USB Power Delivery, Direct and Fast Mobile Chargers
- USB Power Delivery, Direct and Fast Mobile Chargers
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | Tol. C | Size | Operating Temperature | Q | Ceramic Type | Fl (mm) | L (µH) | IR (A) | ISAT (A) | RDC max. (Ω) | fres (MHz) | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 890324022017CS | SPEC | 8 files | WCAP-FTX2 Film Capacitors | Across the mains | 68 nF | 275 | X2 | 400 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 7.5 | 10 | 6 | 12 | Carton | ±10% | Pitch 7.5 mm | -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | ||
 | 7447462010 | SPEC | 8 files | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | – | 6 | 6 | 8.5 | – | – | 5075 | -40 °C up to +125 °C | – | – | – | 1 | 8.5 | 8 | 0.015 | 140 | Heat Shrinking Tube | ||
| 7447462220 | SPEC | 8 files | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | – | 6 | 6 | 8.5 | – | – | 5075 | -40 °C up to +125 °C | – | – | – | 22 | 1.8 | – | 0.13 | 15 | Heat Shrinking Tube | ||
 | 885012005055 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | – | 10 pF | 50 | – | – | – | 10 GΩ | – | – | 1 | 0.5 | 0.5 | 7" Tape & Reel | ±5% | 0402 | -55 °C up to +125 °C | 600 | NP0 Class I | 0.25 | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 890324022017CS | SPEC | |
| 7447462010 | SPEC | |
| 7447462220 | SPEC | |
| 885012005055 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | Tol. C | Size | Operating Temperature | Q | Ceramic Type | Fl (mm) | L (µH) | IR (A) | ISAT (A) | RDC max. (Ω) | fres (MHz) | Version | Samples |
|---|