Calculation tool
UCG28824-CALC — UCG28824 design calculator
System design tool based on flyback converter with integrated GaN
Data sheet
UCG28824
- 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.
Technical documentation
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View all 2 | Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | UCG2882x Self-Biased High Frequency QR Flyback Converter With Integrated GaN datasheet (Rev. C) | PDF | HTML | 02 Dec 2025 |
| Application note | Design a Fixed Output Voltage Flyback with the UCG2882x Family of Devices | PDF | HTML | 15 Jul 2025 |
Design & development
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Evaluation board
UCG28824EVM-124 — UCG28824 45W QR flyback evaluation module
The UCG28824EVM-124 is a 45W USB-C PD evaluation module (EVM) for evaluating an off-line GaN integrated quasi-resonant flyback converter for AC/DC adapters, chargers, USB wall outlets, and other applications. The EVM meets CoC Tier 2 and DoE Level 6 efficiency requirements. The EVM is intended for (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (REZ) | 12 | Ultra Librarian |
Ordering & quality
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