Home Power management AC/DC & DC/DC converters (integrated FET)
Home
Power management
AC/DC & DC/DC converters (integrated FET)
NEW

UCG28826

ACTIVE

Self-biased high frequency QR flyback converter with integrated GaN (65W)

Order now
Data sheet

UCG28826

ACTIVE
Data sheet Order now

Product details

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.
filter Find other AC/DC & DC/DC converters (integrated FET)
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 9
Type Title Date
* Data sheet UCG2882x Self-Biased High Frequency QR Flyback Converter With Integrated GaN datasheet (Rev. C) PDF | HTML 02 Dec 2025
Technical article 如何以自我偏壓轉換器簡化 AC/DC 返馳設計 PDF | HTML 06 Aug 2025
Technical article 체 바이어스 컨버터로 AC/DC 플라이백 설계를 간소화하는 방법 PDF | HTML 06 Aug 2025
Technical article How to simplify AC/DC flyback design with a self-biased converter PDF | HTML 22 Jul 2025
Application note Design a Fixed Output Voltage Flyback with the UCG2882x Family of Devices PDF | HTML 15 Jul 2025
Application note How to Size the VCC Cap for a VCC Self-Biasing Based GaN Flyback Converter PDF | HTML 01 Apr 2025
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 13 Feb 2025
Technical article 보조 GaN 플라이백 컨버터가 AC/DC 어댑터 설계 과제를 해결하는 방법 (Rev. A) PDF | HTML 13 Feb 2025
Technical article How an auxless GaN flyback converter can solve AC/DC adapter design challenges (Rev. A) PDF | HTML 11 Feb 2025

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

UCG28826EVM-093 — UCG28826 evaluation module

The UCG28826EVM-093 is a 65W USB-C® PD evaluation module (EVM) for evaluating an off-line GaN integrated quasi-resonant flyback adapter for AC/DC adapters, chargers, USB wall outlets, and other applications. The EVM meets CoC Tier two and DoE Level six efficiency requirements. The EVM is intended (...)

User guide: PDF | HTML
Request
Simulation model

UCG28826 Simplis Model

SLUM953.ZIP (296 KB) - SIMPLIS Model
Download
Calculation tool

UCG28826-CALC — UCG28826 design calculator

System design tool based on flyback converter with integrated GaN
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
  • UCG28826 — Self-biased high frequency QR flyback converter with integrated GaN (65W)
Download
Reference designs

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
Reference designs

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
Reference designs

PMP41117 — 65W dual-port USB Power Delivery charger with self-biasing GaN flyback converter reference design

This reference design is a 65W dual-port USB Power Delivery (PD) charger with self-biasing gallium nitride (GaN) flyback. This design can deliver 65W full rated power across 90VAC to 264VAC and meet efficiency standards and regulations such as DoE Level VI and CoC V5 Tier 2 efficiency standards for (...)
Test report: PDF
Reference designs

PMP41163 — Universal AC input 65W low-profile AC/DC USB PD charger reference design with integrated GaN

This reference design is a 65W, low-profile AC/DC USB Power Delivery (PD) charger reference design with integrated flyback controller and gallium nitride (GaN) power switch. This design can achieve less than 10mm height by using a low-profile planar printed circuit board (PCB) transformer. The (...)
Test report: PDF
Reference designs

PMP41131 — Universal AC-input 45W low-profile USB power delivery charger reference design with integrated GaN

This reference design is a 45W, low-profile AC/DC USB Power Delivery (PD) charger reference design with integrated flyback controller and gallium nitride (GaN) power switch. This design can achieve less than 10mm height by using a low-profile planar PCB transformer. The flyback converter UCG28826 (...)
Test report: PDF
Reference designs

PMP41145 — Universal AC-input, 65W, 20V 3.25A flyback with integrated GaN reference design

This reference design is a 65W, 20V fixed output voltage AC-DC power supply design with integrated flyback and Gallium nitride (GaN). This design can deliver 65W full rated power across 90VAC to 264VAC and achieve 93% efficiency at 90VAC. The design can meet efficiency standards and regulations (...)
Test report: PDF
Package Pins CAD symbols, footprints & 3D models
VQFN (REZ) 12 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos