1 Features
• 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

2 Applications
• USB-PD adapter for portable electronics
• USB wall outlets and docking stations
• Industrial DIN rail power supplies
• Server aux power supplies

3 Description
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.
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.
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 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.