Sensing of current in a synchronous-buck power stage

Details Sensing of current in a synchronous-buck power stage Sensing of current in a synchronous-buck power stage

1998-12-17

2000-12-12

Berhane, Adolf Deneke

Electricity: power supply or regulation systems

Output level responsive

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

G05F 1563

Patent

active

061603880

ABSTRACT:
A DC-DC converter that generates a sense signal representing a voltage drop across a low-side switch when the low-side switch is on. The sense signal is inverted and stored in a "hold" capacitor until the beginning of the next switching cycle. More specifically, an input node receives an input voltage V.sub.IN. A driver stage coupled to the input node and to a reference node chops V.sub.IN into a square wave under control of a PWM signal. The chopped V.sub.IN signal is coupled to an intermediate output node. An output stage coupled to the intermediate output node converts the chopped V.sub.IN signal to an output voltage V.sub.OUT to a load coupled to an output node. A sense unit coupled to sense a voltage on the intermediate output node generates a voltage signal indicating current flowing in the load.

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patent: 5959442 (1999-09-01), Hallberg et al.
patent: 5994885 (1999-11-01), Wilcox et al.

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