Method and apparatus for trimming current limit and...

Details Method and apparatus for trimming current limit and... Method and apparatus for trimming current limit and...

2006-09-19

2006-09-19

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C361S018000

Reexamination Certificate

active

07109696

ABSTRACT:
Methods and apparatuses to trim current limit (Ip) and frequency (f) to maintain a constant maximum power. In one aspect of the invention, a power supply regulator having a peak current limit detection threshold and an operating frequency is disclosed. The peak current limit threshold or the operating frequency are adjusted specifically to maintain the Ipm·fnproduct substantially constant from one power supply controller to another where m is substantially equal to 2 and n is substantially equal to 1. In another aspect of the invention, the power supply regulator has a control circuit having a control threshold current. The peak current limit threshold or the operating frequency are adjusted specifically to maintain the product of Ipm·fndivided by the control threshold current substantially constant from one power supply controller to another where m is substantially equal to 2 and n is substantially equal to 1.

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“Design Idea DI-11 TinySwitch®-II Buck Converter,” Power Integrations, Inc., www.powerint.com, Aug. 2001.

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