Switch-mode power supply

Details Switch-mode power supply Switch-mode power supply

2009-03-20

2011-12-13

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S222000, C363S044000, C363S082000, C363S089000

Reexamination Certificate

active

08076919

ABSTRACT:
Disclosed is a Power Factor Correction Controller, which comprises a boost converter, a current sensing unit, an arithmetic unit, and a switch driving unit. The current sensing unit can sense or derive the current that pass through the energy delivery device, which is normally implemented by a diode or a switch. The current sensing unit can also sense the inductor current, or the switch current. With the current sensing unit, the arithmetic unit can calculate the optimum switch on-time or when to turn off the switch, without direct-sensing of the load. The disclosed method reduces the system cost by removing the needs to sense the load condition as in the prior arts. The disclosed method also improves the system response by sensing the delivered current at energy delivery side, rather than the receiver side as in the prior arts.

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patent: 7538525 (2009-05-01), Kim et al.
patent: 2011/0170324 (2011-07-01), Hsieh et al.

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