Texas Instruments Corporation

David G Daniels

Tom L Fowler

Heping Dai

David Alexander Grant

Erhan Ozalevli

Dale J Skelton

Luthuli E Dake

Feng Lin

Alan Johnson

Thomas Lane Fowler

Ayesha I Mayhugh

Aiman Alhoussami

A DC-DC converter includes a primary side sense circuit to detect a load current of the DC-DC converter based on reflected current from a secondary winding of the DC-DC converter to a primary winding of the DC-DC converter. A primary side diode models effects of a secondary side diode that is driven from the secondary winding of the DC-DC converter. An output correction circuit controls a switching waveform to the primary winding of the DC-DC converter based on feedback from the primary side sense circuit and the primary side diode.

Primary-side regulation for isolated power supplies

A buck regulator switching power supply () selectively enabling a low side device to effectively recharge a bootstrap capacitor (C) during a high duty cycle of operation. The switching power supply () includes a gate driver () driving a gate of a high side FET (Q) responsive to a controller circuit (). Controller circuit () includes a controller () responsively controlled by a comparator (). Comparator () senses the charge of the charging side of the bootstrap capacitor (C) as compared to a voltage (V). The comparator () also responsively generates an output signal on an output line () as a function of the voltage at the phased output.

Guaranteed bootstrap hold-up circuit for buck high side switch

A current limit circuit regulates the current flow through a power switchby measuring the current through the switchand comparing it to a reference voltage Vthat represents the limit current. When the current through the power switchis greater than the limit current, the current in the power switchis pulled lower by a driver circuitwhich controls the power switch. By using a current limit reference voltage that has two levels, the power switchhas two current limit thresholds. Using a comparatorto compare the input voltage of the power switchto the output voltage of the power switch, an output signal is generated to control the current limit threshold. When the input voltage and output voltage has a large differential voltage, a lower current limit threshold voltage is selected. When the input voltage and output voltage has a small differential voltage, an upper limit threshold voltage is selected.

Inrush current control method using a dual current limit power switch

A low gain feedback compensation circuit is provided on an integrated circuit. The feedback compensation circuit is coupled to a step down power supply on the integrated circuit. The step down power supply is operable to receive an input voltage and to generate an output voltage based on the input voltage. The feedback compensation circuit includes a line regulation circuit. The line regulation circuit is operable to receive the input voltage and a reference voltage. The line regulation circuit is also operable to generate an offset voltage based on the input voltage and the reference voltage.

System and method for dynamically regulating a step down power supply

An apparatus for generating a supply voltage includes a first regulator for generating a first supply voltage, a second regulator for generating a second supply voltage, and a feedback circuit to control the second regulator.

Method for simultaneous output ramp up of multiple regulators

A hot swappable system includes a first system having an electrically conductive projection and a second system. The second system includes a voltage source having a first node having a first polarity, a resistive element, and a receptor system associated with the first node and configured to receive insertion of the conductive projection. The receptor system includes first and second conductive contacts electrically connected by the resistive element. The first conductive contact is disposed relative to the second conductive contact such that insertion of the conductive projection into the receptor system causes sequential electrical contact between the conductive projection and the first contact and then between the conductive projection and the second contact.

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Dallas, TX, United States of America

David G Daniels