Power supply controller with high efficiency under various load condition

Published:2011/11/13 21:13:00 Author:May | Keyword: Power supply controller, high efficiency, under various load condition | From:SeekIC

Aimed at all sorts of AC/DC and DC/DC conversion applications, iWatt company has developed three kinds of chip which can achieve pulse Train technology. The company also integrates some other functions in it. The functions are control logic, waveform analyzer, multiplexer, regulators and drives and so on. iW2101 is isolation DC / DC controller chip; iW2201 is AC / DC controller chip; iW2202 is single-chip type AC / DC controller with internal active PFC circuit. Differ from other PFC program using complex circuits and common PWM controller, the FPC and regulated voltage of iW2202 are both offered by the initial feedback of single-stage single-switch topology, as shown in Figure 4. In the same application, the other PFC programs can make the justified voltage of capacitor over 1000V, but iW2202 program does not exceed 400V. It can not only reduce the stress of component and improve reliability, but also can achieve higher performance at lower cost systems.



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