Freescale Semiconductor,inc.

Nxp Usa, Inc.

Tarek Hakam

Mohammed Mansri

Benoit Alcouffe

Alexandre Pujol

Jerome Casters

Bernard Pierre Francois Pechaud

A current sense circuit for a PWM driver comprises: a PWM control circuit comprising: a first switching device arranged to receive a PWM signal from the PWM driver whose current is to be sensed; and a second switching device whose supply current is arranged to track the sensed current of the PWM driver. An ADC is operably coupled to the first and second switching device. The ADC comprises: a DAC arranged to provide a current sense to the second switching device that tracks the current passing through the PWM driver; a first comparator arranged to receive and compare an output current from the DAC and an output current from the first switching device; and a first successive approximation register arranged to receive an output from the comparator and provide: a first output to the ADC; and a second output that provides a representation of the sensed current.

Integrated circuit, current sense circuit for a pulse width modulation driver and method therefor

A switching power converter for DC-DC converting has an inductance coupled between a power output and a high side switch in a controller device. The controller device has an error amplifier coupled to the power output and a reference voltage for activating the high side switch. The controller device has a bypass circuit including a bypass switch coupled between the supply input and the power output, a bypass driver having a first input coupled to the power output and a second input coupled to the reference voltage, and an output coupled to the bypass switch for activating the bypass switch. The controller further has a high bypass current sensor for generating a transient signal based on a current via the bypass switch, and a bandwidth control circuit for increasing the bandwidth of the error amplifier based on the transient signal.

Power converter and controller device

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Toulouse, France

Tarek Hakam