The UCC28910 and UCC28911 are high-voltage flyback switchers that provide
output voltage and current regulation without the use of an optical coupler.
Both devices incorporate a 700-V power FET and a controller that process
operating information from the flyback auxiliary winding and power FET to
provide a precise output voltage and current control. The integrated
high-voltage current source for startup that is switched off during device
operation, and the controller current consumption is dynamically adjusted with
load. Both enable the very low stand-by power consumption.
Control algorithms in the UCC28910 and UCC28911, combining switching
frequency and peak primary current modulation, allow operating efficiencies to
meet or exceed applicable standards. Discontinuous conduction mode (DCM) with
valley switching is used to reduce switching losses. Built-in protection
features help to keep secondary and primary component stress levels in check
across the operating range. The frequency jitter helps to reduce EMI filter
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