Texas Instruments UCG28826
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.
RatingCatalogTopologyFlybackSwitch current limit (typ) (A)3.5FeaturesAdjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap dischargeEMI featuresFrequency Dithering, Switching slew rate control, Valley hoppingControl modePeak current modeSwitching frequency (min) (kHz)25Switching frequency (max) (kHz)500Operating temperature range (°C)-40 to 105TypeConverter (Integrated Switch)
