Powerlink Microelectronics PL3329 SOP-8

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CV/CC Primary Side PWM Power Switch.
PL3329 is a high efficiency Primary Side Regulator and highly integrated PWM Power Switch for sub 5W AC/DC power supply applications. It simplifies conventional CC/CV charger/adaptor designs by eliminating the opto-coupler and secondary control circuitry. Very tight output voltage and current regulation is realized as shown in the Fig.1 below. During operation, multi-mode operations are utilized to achieve low standby power, high efficiency and audio & noise free. The frequency jittering could also greatly reduce EMI filter cost. The integrated Power MOSFETcould reduce external components and system cost. PL3329 also offers rich protection features including Cycle-by-Cycle peak current limiting, UVLO, OVP andClamp. The switch continues attempting start-up until the fault condition is removed. Every restart is a soft start.