HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR
DESCRIPTION
The UTC UPSRB01 is a primary control unit for switch mode
charger and adapter applications. The controlled variable is
transferred by an auxiliary winding from the secondary to the
primary side. The device uses Pulse Frequency Modulation
(PFM) method to build discontinuous conduction mode (DCM)
flyback power supplies.
The UTC UPSRB01 operates in primary-side sensing and
regulation. Opto-coupler and TL431 could be eliminated. It also
eliminates the need of loop compensation circuitry while
maintaining stability.
The UTC UPSRB01 achieves high precision CV/CC regulation
and high power efficiency. It offers comprehensive protection
coverage with auto-recovery features including Cycle-by-cycle
current limiting, output over voltage protection, VDD over voltage
protection, feedback loop open protection, short circuit protection,
leading edge blanking, OTP, VDD under voltage lockout, etc. |
