UCC28781

現行

具有整合式 SR 控制的高密度、零電壓切換 (ZVS) 返馳控制器

產品詳細資料

Operating temperature range (°C) -40 to 125 Control mode Secondary-side regulation Topology Flyback Rating Catalog Features Adaptive burst mode, Overvoltage protection, Secondary-side regulated, USB C/PD compatible, X-capacitor discharge, Zero voltage switching
Operating temperature range (°C) -40 to 125 Control mode Secondary-side regulation Topology Flyback Rating Catalog Features Adaptive burst mode, Overvoltage protection, Secondary-side regulated, USB C/PD compatible, X-capacitor discharge, Zero voltage switching
WQFN (RTW) 24 16 mm² 4 x 4
  • Switching frequency: > 500 kHz
  • Enables peak efficiency > 93 %
  • Enables < 45 mW stand-by power
  • Adaptive control for zero-voltage-switching (ZVS) and dead-time optimization
  • EMI frequency-dithering without trade-offs on transient response or audible noise
  • Programmable adaptive burst mode (ABM) with internal compensation
  • X-capacitor discharge capability
  • Over-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protections
  • Auto-recovery fault-responses
  • 4 mm × 4 mm, 24-pin, QFN package
  • Switching frequency: > 500 kHz
  • Enables peak efficiency > 93 %
  • Enables < 45 mW stand-by power
  • Adaptive control for zero-voltage-switching (ZVS) and dead-time optimization
  • EMI frequency-dithering without trade-offs on transient response or audible noise
  • Programmable adaptive burst mode (ABM) with internal compensation
  • X-capacitor discharge capability
  • Over-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protections
  • Auto-recovery fault-responses
  • 4 mm × 4 mm, 24-pin, QFN package

The UCC28781 is a zero-voltage-switching (ZVS) controller which can be used at very high switching frequencies to minimize the size of the transformer and enable high power density.

With direct synchronous rectifier (SR) control, the controller does not need a separate SR controller, as it can drive the SR FET directly to maximize efficiency and simplify design. (For isolated applications, an isolated gate-driver IC is required.)

Using adaptive dead-time control for ZVS, switching losses and EMI are minimized. This design results in a controller with extremely high conversion efficiency across the entire operating range.

The programmable adaptive burst mode (ABM) gives flexibility to control when the controller enters and exits standby mode to optimize standby power in light and no-load conditions. ABM also helps to reduce ripple and minimize audible noise.

The controller offers multiple protection modes with automatic restart (retry) responses.

The UCC28781 is a zero-voltage-switching (ZVS) controller which can be used at very high switching frequencies to minimize the size of the transformer and enable high power density.

With direct synchronous rectifier (SR) control, the controller does not need a separate SR controller, as it can drive the SR FET directly to maximize efficiency and simplify design. (For isolated applications, an isolated gate-driver IC is required.)

Using adaptive dead-time control for ZVS, switching losses and EMI are minimized. This design results in a controller with extremely high conversion efficiency across the entire operating range.

The programmable adaptive burst mode (ABM) gives flexibility to control when the controller enters and exits standby mode to optimize standby power in light and no-load conditions. ABM also helps to reduce ripple and minimize audible noise.

The controller offers multiple protection modes with automatic restart (retry) responses.

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技術文件

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類型 標題 日期
* Data sheet UCC28781 Zero-Voltage-Switching Flyback Controller with Dedicated Synchronous Rectifier Gate-Drive datasheet PDF | HTML 2021年 12月 8日
User guide Using the UCC28781EVM-053 Zero-Voltage-Switching Flyback Converter (Rev. A) PDF | HTML 2022年 9月 15日
Application brief Flyback Selection Guide PDF | HTML 2022年 6月 23日
Certificate UCC28781EVM-053 EU RoHS Declaration of Conformity (DoC) 2021年 8月 19日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

UCC28781EVM-053 — 適用於車用 500-Vdc 輸入 ZVS 返馳電源供應器應用的 UCC28781-Q1 評估模組

UCC28781EMV-053 展示了使用零電壓切換返馳 (ZVSF) 控制器的 60-W、15-V 輸出的高效率,高密度,高壓汽車偏壓電源。UCC28781-Q1 直接驅動一次側矽 MOSFET,並透過 UCC5304 絕緣式閘極驅動器驅動二次側同步整流器,以提升效率並達到 ZVS。

使用指南: PDF | HTML
TI.com 無法提供
參考設計

PMP23331 — 適合伺服器應用的 19-W、AC/DC 多輸出 5-V 與 12-V ZVS 返馳參考設計

此參考設計將通用 AC 輸入轉換為隔離式 12-V、1.5-A 輸出與隔離式 5-V、0.2-A 輸出。此設計的峰值效率達 92.7%。本參考設計具備 UCC28781-Q1,其為零電壓切換 (ZVS) 返馳式控制器,可將切換損失降到最低,而 UCC5350 是一款可驅動同步整流器 MOSFET 的強化型隔離式閘極驅動器,TPS629203 則為具低靜態電流的同步降壓轉換器。
Test report: PDF
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

內含資訊:
  • 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
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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