Active clamp recovers leakage inductance energy
Adaptive control for fast zero voltage switching (ZVS) tracking and dead time optimization
Auto-recovery and group-latch fault options with fast latch-reset capability
4x4-mm 24-pin QFN package
The UCC28782 is a high-density active-clamp flyback (ACF) controller for USB Type C™ PD applications and allows for efficiencies over 93% by recovering the leakage inductance energy and adaptive ZVS tracking over the full load range.
With a maximum frequency of 1.5 MHz the magnetics can be minimized. Frequency dithering helps to improve EMI margin. The UCC28782 also integrates dynamic bias power management to optimize the gate drive for Si or GaN MOSFETs.
Adaptive Burst Mode (ABM) combined with Low Power Mode (LPM) and Standby Power mode (SBP) work together to increase light-load efficiency while reducing ripple and audible noise.
The UCC28782 also integrates an X-Cap discharge function to discharge the residual input voltage when power is removed.
The UCC28782 has multiple protection modes and options for retry or latch-off responses depending on the application needs. See Device Comparison Table.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | UCC28782 High-Density Active-Clamp Flyback Controller with EMI Dithering, X-Cap Discharge, and Bias Power Management datasheet (Rev. E) | PDF | HTML | Jun 27, 2023 |
| Application note | Enabling Small-Form-Factor AC/DC Adapters With use of Integrated GaN Technology | PDF | HTML | Mar 27, 2023 | |
| Application brief | Flyback Selection Guide | PDF | HTML | Jun 23, 2022 | |
| Application note | UCC28782 Practical Design Guidelines | PDF | HTML | Oct 15, 2021 | |
| Application note | UCC28782 System Bring Up Guideline and Common Issues | PDF | HTML | Sep 29, 2021 | |
| Analog design Journal | Transformer structures that achieve low EMI with low- and high-side rectifiers | Sep 22, 2020 | ||
| Certificate | UCC28782EVM-030 EU Declaration of Conformity (DoC) (Rev. A) | Jun 29, 2020 | ||
| Technical article | How to improve flyback efficiency with a nondissipative clamp | PDF | HTML | Jul 29, 2019 |
For additional terms or required resources, click any title below to view the detail page where available.
UCC28782EVM-030 demonstrates high-efficiency and high-density for a 65-W USB Type-C™ power delivery (PD) off-line adapter using the UCC28782 active-clamp flyback controller. The input supports a universal 90 Vac to 264 Vac and the single output can be set to 5 V, 9 V and 15 V all at 3-A (...)
This reference design is a high-density, 60-W 115-VAC input power supply for USB Type-C applications that uses the UCC28782 active clamp flyback controller, LMG2610 integrated GaN half-bridge and UCC24612 synchronous rectifier driver. The maximum power rating is 60 W at 20-V or 15-V output, 54 W at (...)
This reference design is a 220-W, active clamp flyback battery charger design with power factor correction (PFC) front end. This design takes a universal AC input of 90 V to 264 V and charges a battery with a VOUT range of 6-V to 22-V.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RTW) | 24 | Ultra Librarian |
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