Calculation tool
UCG28826-CALC — UCG28826 design calculator
System design tool based on flyback converter with integrated GaN
UCG28826
Self-biased high frequency QR flyback converter with integrated GaN (65W)
Data sheet
UCG28826
- 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 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
- 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 via 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 built-in 750V GaN high electron mobility transistor (HEMT) with as low as 170mΩ Rds(on) for AC to DC power conversion. It is best suited 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.
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, UCG2882x includes a full list of protections such as brown-in/out protection, SCP, OVP, OPP, LPS, OFB and OTP. The cycle-by-cycle current limit ensures 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.
Technical documentation
No results found. Please clear your search and try again.
View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCG2882x Self-Biased High Frequency QR Flyback Converter With Integrated GaN datasheet (Rev. A) | PDF | HTML | 08 May 2025 |
| EVM User's guide | Using the UCG28826EVM-093 65W USB-C PD High-Density GaN Integrated Quasi-Resonant Flyback Converter (Rev. B) | PDF | HTML | 14 May 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 (...)
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
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 |
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
Support & training
TI E2E™ forums with technical support from TI engineers
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.