UCC28782
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Active clamp recovers leakage inductance energy
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Adaptive control for fast zero voltage switching (ZVS) tracking and dead time optimization
- Integrated switching bias regulator supports USB Type-C PD wide output voltage range with one auxiliary winding
- EMI frequency dithering without trade-offs on transient response or audible noise
- Dynamic bias power management for digital isolator and GaN driver
- Programmable Adaptive Burst Mode (ABM) with internal compensation
- Active X-capacitor (X-cap) discharge
- Over-temperature, over-voltage, output short-circuit, over-current, over-power, and pin-fault protections
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Auto-recovery and group-latch fault options with fast latch-reset capability
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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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC28782 High-Density Active-Clamp Flyback Controller with EMI Dithering, X-Cap Discharge, and Bias Power Management datasheet (Rev. E) | PDF | HTML | 2023年 6月 27日 |
| Technical article | 如何以非耗散箝位提升返馳效率 | PDF | HTML | 2024年 3月 13日 | |
| Application note | Enabling Small-Form-Factor AC/DC Adapters With use of Integrated GaN Technology | PDF | HTML | 2023年 3月 27日 | |
| EVM User's guide | Using the UCC28782EVM-030 (Rev. C) | PDF | HTML | 2022年 7月 28日 | |
| Application brief | Flyback Selection Guide | PDF | HTML | 2022年 6月 23日 | |
| Application note | UCC28782 Practical Design Guidelines | PDF | HTML | 2021年 10月 15日 | |
| Application note | UCC28782 System Bring Up Guideline and Common Issues | PDF | HTML | 2021年 9月 29日 | |
| Analog Design Journal | Transformer structures that achieve low EMI with low- and high-side rectifiers | 2020年 9月 22日 | ||
| Certificate | UCC28782EVM-030 EU Declaration of Conformity (DoC) (Rev. A) | 2020年 6月 29日 |
設計與開發
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UCC28782EVM-030 — 具有 ISO7710FD 的 UCC28782 主動鉗位反馳式轉換器 65-W USB-C PD EVM
UCC28782EVM-030 使用 UCC28782 主動鉗位返馳控制器展現 65-W USB Type-C™ 離線適配器的高效率和高密度。輸入支援通用 90 Vac 至 264 Vac，單輸出在最大電流 3-A 時可設爲 5 V、9 V 和 15 V，最大電流 3.25-A 時則為 20 V，可透過 USB PD 介面控制器進行調整。250-kHz 額定的高頻率操作可縮小解決方案尺寸，多模式操作則可維持高效率。LMG2610 整合了高壓側與低壓側 FET、閘極驅動器、高壓側位準移位器，並提供無耗損電流感測模擬。輸出則採用同步整流以提升效率。
PMP23146 — 適用伺服器輔助電源且具 GaN 的 45-W 高功率密度主動箝位返馳參考設計
PMP22244 — 具備 GaN 的 60-W USB Type-C® 高密度主動箝位返馳參考設計
PMP22322 — 65-W USB Type-C® ZVS 返馳參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTW) | 24 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點