Noise resistant regulator including an encoded control signal

摘要

A converter for supplying a regulated voltage from an input to a load is disclosed. The converter supplies a regulated DC voltage from an input to a load using a power switch driven by a gate driver. It also includes a control loop for carrying a load condition signal and a control signal. The converter also includes a controller located on the control loop that generates the control signal based on the load signal. The controller is located on a first integrated circuit. The gate driver is located on a second integrated circuit. The load condition signal is encoded on the first integrated circuit and is decoded on the second integrated circuit.

主权项

1. A power supply comprising:
a non-isolated DC/DC converter supplying a regulated DC voltage to a load including: a power switch driven by a smart gate driver; a control loop carrying a load condition signal and a control signal; and a controller that generates the control signal responsive to the load condition signal; wherein: the controller is located on a first integrated circuit package; the smart gate driver is located on a second integrated circuit package;
an analog to digital converter located on the second integrated circuit package;an encoder located on the first integrated circuit package, the encoder encoding the control signal and embedding a synchronization signal in the control signal, the synchronization signal providing a precise timing window for timing and sampling of the load condition signal; anda decoder located on the second integrated circuit package, the decoder decoding the control signal and providing the synchronization signal to the analog to digital converter; and the load condition signal is encoded on the second integrated circuit package in proximity to the load to reduce noise sensitivity on the control loop between the first and second integrated circuit packages, the encoded load condition signal is decoded by a second decoder on the first integrated circuit package prior to being passed to the controller.