Texas Instruments Corporation

Johnny Klarenbeek

Sungho Beck

Jae Won Choi

Richard Turkson

Bixia Li

A power source multiplexer includes a first switch circuit connected between a first input voltage source node and an output voltage node. A second switch circuit is connected between a second input voltage source node and the output voltage node. A driver circuit is configured to provide a steady-state current to drive one of the first or second switch circuits to electrically connect the respective input voltage source node to the output voltage node. A boost circuit is configured to boost the steady-state current for a switching time interval when switching from one of the input voltage source nodes being connected to the output node to the other of the input voltage source nodes being connected to the output voltage node.

Power source multiplexer with adaptive switch control

Channel switchover power multiplexer circuits, and methods of operating the same are disclosed. An example power multiplexer a first transistor coupled to a first input, a second transistor coupled to the first transistor to couple a first voltage at the first input to an output, a third transistor coupled to a second input, a fourth transistor coupled to the third transistor to couple a second voltage at the second input to the output, a diode amplifier to provide a third voltage to a gate of the first transistor to block a reverse current, and a soft-start amplifier to provide a fourth voltage to a gate of the fourth transistor to turn on (with adjustable VOUT ramp rate) the fourth transistor with a constant ramp rate.

Channel switchover power multiplexer circuits, and methods of operating the same

A switch for controlling a power supply and a method of operating the switch are disclosed. The switch includes a first transistor having a drain and a source connected between Vand Vand a gate connected to be driven to a first voltage that is greater than V, an external capacitor operable, when connected to the gate of the first transistor, to control a rise time of V, and a circuit coupled to the gate of the first transistor and to the external capacitor, the circuit connected to couple the external capacitor to the gate of the first transistor responsive to an enable signal turning on and to uncouple the external capacitor from the gate of the first transistor responsive to the voltage on the gate reaching the first voltage.

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Dallas, TX, United States of America

Johnny Klarenbeek