TIDUF84 June 2024
The UCC28810 are general lighting power controllers for low to medium power lumens applications requiring power factor correction and EMC compliance. UCC28810 is designed for controlling a flyback, buck or boost converter operating in critical conduction mode. UCC28810 features a trans-conductance voltage amplifier for feedback error processing, a simple current reference generator for generating a current command proportional to the input voltage, a current-sense (PWM) comparator, PWM logic and a totem-pole driver for driving an external FET.
In the critical conduction mode operation, the PWM circuit is self-oscillating with the turn-on being governed by a transformer zero energy detector (TZE pin) and the turn-off being governed by the current sense comparator. Additionally, the controller provides features such as peak current limit, restart timer, over-voltage protection (OVP), and enable.