Valeo Vision

Bernard Guillot

Irantzu Jauregi

David Boudikian

Jean-Philippe Alves

A device for supplying electric power to an electronic component, including a DC-to-DC converter able to operate using pulse width modulation with high states and low states, with an input and an output, the output being intended to supply power to the electrical component; and a protective circuit connected to the input of the DC-to-DC converter, with a storage capacitive component connected to a diode for protecting against polarity reversals. The protective circuit furthermore includes a bypass for bypassing the protective diode so as to allow the storage capacitive component to discharge during the low states of the pulse width modulation.

Pulse width modulation-stabilized electric power supply

The invention provides a device for driving the electrical power supply of at least one electronic circuit branch comprising at least one light source of an automotive vehicle. A converter circuit converts an input voltage Vinto a load voltage (or current) that is applied to said circuit branch, and control means are configured to control the converter circuit by means of a periodic PWM signal having a predetermined frequency f. The frequency f is adapted in real time and according to a disruption that is detected in the input voltage signal Vin order to avoid any occurrence of flickering in the intensity of the luminous flux emitted by the light sources.

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Bobigny, France

Bernard Guillot