Selective high-side and low-side current sensing in...

Details Selective high-side and low-side current sensing in... Selective high-side and low-side current sensing in...

2005-02-08

2005-02-08

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000

Reexamination Certificate

active

06853174

ABSTRACT:
A current mode switching regulator implementing a dual sense scheme includes a first current sensing circuit for sensing a current through a first switch and providing a first current sense signal, and a second current sensing circuit for sensing a current through a second switch and providing a second current sense signal. The switching regulator includes a control circuit for generating switch control signals for driving the first and second switches in response to one of the first and second current sense signals. The regulator further includes a duty cycle detection circuit coupled to determine a duty cycle of the switching regulator. The detection circuit asserts a first select signal to select the first current sense signal when the duty cycle exceeds a first threshold level and asserts a second select signal to select the second current sense signal when the duty cycle is less than a second threshold level.

REFERENCES:
patent: 6166528 (2000-12-01), Rossetti et al.

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