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 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.