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UCG28826

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具有整合式 GaN (65W) 的自偏壓高頻 QR 返馳式轉換器

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UCG28826

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產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 105 Topology Flyback Type Converter (Integrated Switch) Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switch current limit (typ) (A) 3.5
Rating Catalog Operating temperature range (°C) -40 to 105 Topology Flyback Type Converter (Integrated Switch) Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switch current limit (typ) (A) 3.5
VQFN (REZ) 12 25 mm² 5 x 5
  • Integrated 700V GaN with 170mΩ Rds(on)
  • Dynamic QR/DCM/CCM modes of operation
  • Support up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input/output voltage sensing
    • Integrated current sense
    • Integrated HV startup
    • 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
    • Over Temperature Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • Cycle-by-cycle current limit
    • Two-Level Over Power Protection with LPS
    • Brown-in/out Protection
    • Open feedback protection
  • Flexible configurability via external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Max/min peak current ratio
    • Dithering amplitude
  • Integrated 700V GaN with 170mΩ Rds(on)
  • Dynamic QR/DCM/CCM modes of operation
  • Support up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input/output voltage sensing
    • Integrated current sense
    • Integrated HV startup
    • 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
    • Over Temperature Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • Cycle-by-cycle current limit
    • Two-Level Over Power Protection with LPS
    • Brown-in/out Protection
    • Open feedback protection
  • Flexible configurability via external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Max/min peak current ratio
    • Dithering amplitude

UCG28826 is a high frequency, quasi-resonant flyback converter with built-in 170mΩ GaN high electron mobility transistor (HEMT) to convert AC to DC for up to 65W power converters. It is best suited for high power density applications such as cell phone fast chargers and laptop adapters. The key feature of this device is the self-bias and auxless sensing scheme which completely eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

This device also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG28826 includes a full list of protections such as brown-in/out protection, SCP, OVP, OLP, OFB and OTP. The cycle-by-cycle current limit ensures fast response to the fault conditions to safeguard the system and improve the reliability. The Input feedforward and output voltage based OLP correction are implemented to meet LPS requirements. Furthermore, the UCG28826 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.

UCG28826 is a high frequency, quasi-resonant flyback converter with built-in 170mΩ GaN high electron mobility transistor (HEMT) to convert AC to DC for up to 65W power converters. It is best suited for high power density applications such as cell phone fast chargers and laptop adapters. The key feature of this device is the self-bias and auxless sensing scheme which completely eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

This device also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG28826 includes a full list of protections such as brown-in/out protection, SCP, OVP, OLP, OFB and OTP. The cycle-by-cycle current limit ensures fast response to the fault conditions to safeguard the system and improve the reliability. The Input feedforward and output voltage based OLP correction are implemented to meet LPS requirements. Furthermore, the UCG28826 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 UCG28826 Self-biased High Frequency QR Flyback Converter with Integrated GaN datasheet PDF | HTML 2023年 9月 12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 PDF | HTML 2024年 10月 30日
EVM User's guide Using the UCG28826EVM-093 65-W USB-C PD High-Density Quasi-Resonant flyback controller PDF | HTML 2024年 9月 6日

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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
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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
參考設計

PMP41117 — 具有整合式 GaN 的通用 AC 輸入 65W 雙 USB Type-C® 埠 USB PD 充電器參考設計

此參考設計為 65W、雙 USB TypeC® 埠 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 (...)
Test report: PDF
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