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UCG28826

現行

具有整合式 GaN (65W) 的自偏壓高頻 QR 返馳式轉換器

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產品規格表

UCG28826

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Flyback Switch current limit (typ) (A) 3.5 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Overcurrent protection, Overtemperature protection, Overvoltage protection, Self-bias, Short circuit protection, USB C/PD compatible, Undervoltage protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Operating temperature range (°C) -40 to 105 Type Converter (Integrated Switch)
Rating Catalog Topology Flyback Switch current limit (typ) (A) 3.5 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Overcurrent protection, Overtemperature protection, Overvoltage protection, Self-bias, Short circuit protection, USB C/PD compatible, Undervoltage protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Operating temperature range (°C) -40 to 105 Type Converter (Integrated Switch)
VQFN (REZ) 12 25 mm² 5 x 5
  • Integrated 750V GaN with 170mΩ Rds(on) option
  • Dynamic QR/DCM/CCM modes of operation
  • High power density: up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input and output voltage sensing
    • Integrated current sense
    • Integrated HV start-up
    • Integrated X-cap discharge
  • High efficiency and low EMI performance
    • Ultra-low standby power: <30mW
    • Frequency foldback and burst mode
    • Valley locking
    • Frequency dithering
    • Switching slew rate control
  • Comprehensive protection features
    • Overtemperature protection
    • Overvoltage protection
    • Short-circuit protection
    • Cycle-by-cycle current limit
    • Two-level over power protection with LPS
    • Brownin and brownout protection
    • Open feedback protection
  • Flexible configurability through external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Maximum and minimum peak current ratio
    • Dithering amplitude
  • Integrated 750V GaN with 170mΩ Rds(on) option
  • Dynamic QR/DCM/CCM modes of operation
  • High power density: up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input and output voltage sensing
    • Integrated current sense
    • Integrated HV start-up
    • Integrated X-cap discharge
  • High efficiency and low EMI performance
    • Ultra-low standby power: <30mW
    • Frequency foldback and burst mode
    • Valley locking
    • Frequency dithering
    • Switching slew rate control
  • Comprehensive protection features
    • Overtemperature protection
    • Overvoltage protection
    • Short-circuit protection
    • Cycle-by-cycle current limit
    • Two-level over power protection with LPS
    • Brownin and brownout protection
    • Open feedback protection
  • Flexible configurability through external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Maximum and minimum peak current ratio
    • Dithering amplitude

UCG2882x is a high frequency, quasi-resonant flyback converter with a built-in 750V GaN high electron mobility transistor (HEMT) with as low as 170mΩ Rds(on) for AC to DC power conversion. The UCG2882x is designed for high power density applications, such as cell phone fast chargers and notebook adapters. The key feature of this device is the self-bias and auxless sensing scheme which eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

The UCG2882x also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG2882x includes a full list of protections, such as brownin and brownout protection, SCP, OVP, OPP, LPS, OFB and OTP. The cycle-by-cycle current limit allows for fast response to the fault conditions to safeguard the system and improve the reliability. In a small 5 × 5mm package, the UCG2882x has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.

UCG2882x is a high frequency, quasi-resonant flyback converter with a built-in 750V GaN high electron mobility transistor (HEMT) with as low as 170mΩ Rds(on) for AC to DC power conversion. The UCG2882x is designed for high power density applications, such as cell phone fast chargers and notebook adapters. The key feature of this device is the self-bias and auxless sensing scheme which eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

The UCG2882x also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG2882x includes a full list of protections, such as brownin and brownout protection, SCP, OVP, OPP, LPS, OFB and OTP. The cycle-by-cycle current limit allows for fast response to the fault conditions to safeguard the system and improve the reliability. In a small 5 × 5mm package, the UCG2882x has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.
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類型 標題 日期
* Data sheet UCG2882x Self-Biased High Frequency QR Flyback Converter With Integrated GaN datasheet (Rev. C) PDF | HTML 2025年 12月 2日
Technical article 如何以自我偏壓轉換器簡化 AC/DC 返馳設計 PDF | HTML 2025年 8月 6日
Application note Design a Fixed Output Voltage Flyback with the UCG2882x Family of Devices PDF | HTML 2025年 7月 15日
Application note How to Size the VCC Cap for a VCC Self-Biasing Based GaN Flyback Converter PDF | HTML 2025年 4月 1日
Technical article 無輔助 GaN 返馳式轉換器如何解決 AC/DC 變壓器設計挑戰 (Rev. A) PDF | HTML 2025年 2月 13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

UCG28826EVM-093 — UCG28826 評估模組

UCG28826EVM-093 是 65W USB-C® PD 評估模組 (EVM)，可用於評估適用於 AC/DC 變壓器、充電器、USB 壁式插座和其他應用的離線 GaN 整合式準諧振返馳轉接器。該 EVM 符合 CoC Tier 2 與 DoE Level 6 的效率要求。EVM 旨在供評估使用，而不是終端產品。UCG28826EVM-093 將 90VRMS 的輸入電壓轉換為 264VRMS，降至可選 USB-C PD 輸出電壓 20VDC (最大為 3.25A)，並將輸入電壓轉換為 5VDC、9VDC 和 15VDC，最大輸出電流額定值為 3.00A。此設計中使用的主要裝置為 (...)

使用指南: PDF | HTML
要求
模擬型號

UCG28826 Simplis Model

SLUM953.ZIP (296 KB) - SIMPLIS Model
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計算工具

UCG28826-CALC — UCG28826 design calculator

System design tool based on flyback converter with integrated GaN
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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
UCG28826 — 具有整合式 GaN (65W) 的自偏壓高頻 QR 返馳式轉換器
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參考設計

PMP31406 — Quasi-resonant GaN flyback reference design

This reference design generates a 24V output with 2.5A load current from a 195VAC to 265VAC input. This design uses the self-biasing gallium nitride (GaN) flyback UCG28826. This design can deliver 60W output power. The design does not need an auxiliary transformer winding because this device has a (...)
Test report: PDF
參考設計

PMP31375 — 180VAC to 275VAC input, 96W - 24V AC/DC flyback with self-biasing GaN reference design

This reference design is a power supply delivering 24V, 1A average and up to 96W for 4 seconds. This design supports all cases where high peak power like motor drive or transitory power loads need to be addressed. The integrated quasi-resonant controller, gallium nitride (GaN) switch, and (...)
Test report: PDF
參考設計

PMP41117 — 65W 雙埠 USB 電力傳輸充電器參考設計（採用自偏壓 GaN 返馳式轉換器）

此參考設計為搭載自偏壓氮化鎵 (GaN) 返馳的 65W 雙埠 USB PD 快充充電器。此設計可在 90VAC 至 264VAC 間提供 65W 全額定功率，並可滿足效率標準與規範，例如針對在 25%、50%、75%、100% 下之平均效率的 DoE Level VI 和 CoC V5 Tier 2 效率標準，同時也可達到低待機功耗。AC-DC 級返馳轉換器 UCG28826 具有 VCC 自偏壓，並可免除對附屬線圈及相關 VCC 整流器電路的需求，進而簡化電路。DC-DC 級降壓轉換器 TPS56837HA 切換頻率以 500kHz 運作，可進一步將降壓級尺寸縮減至最小，產生每立方公分 (...)
Test report: PDF
參考設計

PMP41163 — 具有整合式 GaN 的通用 AC 輸入 65W 薄型 AC/DC USB PD 充電器參考設計

此參考設計為 65W、薄型 AC/DC USB 電力輸送 (PD) 充電器參考設計，具備整合式返馳控制器與氮化鎵 (GaN) 電源開關。此設計採用薄型平面式印刷電路板 (PCB) 變壓器，可實現低於 10mm 的高度。返馳轉換器 UCG28826 具有 VCC 自偏壓，並可免除對附屬線圈及相關 VCC 整流器電路的需求，進而簡化平面變壓器的 PCB 繞線設計。此設計可符合能源效率標準與法規要求，包含美國能源部 (DoE) Level VI 及歐盟行為準則 (CoC) V5 Tier 2 標準。此設計在 230VAC 輸入下可實現低於 75mW 的待機功耗。
Test report: PDF
參考設計

PMP41131 — 具有整合式 GaN 的通用 AC 輸入 45W 薄型 USB 電力傳輸充電器參考設計

此參考設計為 45W、薄型 AC/DC USB 電力輸送 (PD) 充電器參考設計，具備整合式返馳控制器與氮化鎵 (GaN) 電源開關。此設計採用薄型平面式 PCB 變壓器，可實現低於 10mm 的高度。返馳轉換器 UCG28826 具有 VCC 自偏壓，並可免除對附屬線圈及相關 VCC 整流器電路的需求，進而簡化平面變壓器的 PCB 繞線設計。此設計可符合能源效率標準與法規要求，包含美國能源部 (DOE) Level VI 及行為準則 (CoC) Version 5 (V5) Tier 2 標準。此設計在 230VAC 輸入下可實現低於 75mW 的待機功耗。
Test report: PDF
參考設計

PMP41145 — 具有整合式 GaN 的通用 AC 輸入、65W、20V 3.25A 返馳參考設計

此參考設計為 65W、20V 固定輸出電壓 AC-DC 電源供應設計，並具備整合式返馳與氮化鎵 (GaN)。此設計可在 90VAC 至 264VAC 間提供 65W 全額定功率，並在 90VAC 時實現 93% 的效率。此設計可滿足效率標準與規範，例如針對在 25%、50%、75%、100% 及待機功耗下之平均效率的 DoE Level VII 和 CoC V5 Tier 2 效率標準。此設計可達到每立方公分 2.3W，且可免除輔助繞組及相關 VCC 整流器電路。此設計也可支援 100W 峰值功率能力達 4ms。
Test report: PDF
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