Abstract: In described examples, bootstrap diode circuits include a first diode having a first diode input coupled to a voltage supply and a first diode output. Described bootstrap diode circuits additionally include a second diode having a second diode input coupled to the first diode output and a second diode output and a plurality of zener diodes coupled in series. The series-coupled zener diodes are further coupled in parallel with the second diode.

Abstract: An apparatus includes a voltage divider circuit including a plurality of series-connected capacitors and including an input terminal of one of the capacitors configured to receive a first voltage from a switch, and a ring node comprising the connection between at least two of the series-connected capacitors. The apparatus further includes a negative clamp circuit coupled to the ring node of the voltage divider circuit and a bias voltage node. The bias voltage node is configured to receive a bias voltage and responsive to a ring voltage on the ring node being less than the bias voltage, the negative clamp circuit is configured to clamp the ring voltage at a first threshold voltage. The apparatus also includes a peak detector circuit coupled to the ring node of the voltage divider circuit and configured to detect a peak amplitude of the ring voltage.

Abstract: An apparatus to monitor and control a switching rate in a switch includes a differentiator circuit including a capacitor and a configurable resistor. The differentiator circuit further includes an input terminal of the capacitors configured to receive a first voltage from a switch and a differentiator node configured to receive a differentiated voltage based on the first voltage. The apparatus includes a peak detector circuit coupled to the differentiator node and configured to detect a peak value of the differentiated voltage. The apparatus further includes a driver circuit coupled to the peak detector circuit and configured to adjust a control signal to the switch responsive to the detected peak value of the differentiated voltage.

Abstract: An apparatus includes a voltage divider circuit including a plurality of series-connected capacitors and including an input terminal of one of the capacitors configured to receive a first voltage from a switch, and a ring node comprising the connection between at least two of the series-connected capacitors. The apparatus further includes a negative clamp circuit coupled to the ring node of the voltage divider circuit and a bias voltage node. The bias voltage node is configured to receive a bias voltage and responsive to a ring voltage on the ring node being less than the bias voltage, the negative clamp circuit is configured to clamp the ring voltage at a first threshold voltage. The apparatus also includes a peak detector circuit coupled to the ring node of the voltage divider circuit and configured to detect a peak amplitude of the ring voltage.

Abstract: An apparatus includes a voltage divider circuit including a plurality of series-connected capacitors and including an input terminal of one of the capacitors configured to receive a first voltage from a switch, and a ring node comprising the connection between at least two of the series-connected capacitors. The apparatus further includes a negative clamp circuit coupled to the ring node of the voltage divider circuit and a bias voltage node. The bias voltage node is configured to receive a bias voltage and responsive to a ring voltage on the ring node being less than the bias voltage, the negative clamp circuit is configured to clamp the ring voltage at a first threshold voltage. The apparatus also includes a peak detector circuit coupled to the ring node of the voltage divider circuit and configured to detect a peak amplitude of the ring voltage.

Abstract: An apparatus to monitor and control a switching rate in a switch includes a differentiator circuit including a capacitor and a configurable resistor. The differentiator circuit further includes an input terminal of the capacitors configured to receive a first voltage from a switch and a differentiator node configured to receive a differentiated voltage based on the first voltage. The apparatus includes a peak detector circuit coupled to the differentiator node and configured to detect a peak value of the differentiated voltage. The apparatus further includes a driver circuit coupled to the peak detector circuit and configured to adjust a control signal to the switch responsive to the detected peak value of the differentiated voltage.

Abstract: An apparatus includes a voltage divider circuit including a plurality of series- connected capacitors and including an input terminal of one of the capacitors configured to receive a first voltage from a switch, and a ring node comprising the connection between at least two of the series-connected capacitors. The apparatus further includes a negative clamp circuit coupled to the ring node of the voltage divider circuit and a bias voltage node. The bias voltage node is configured to receive a bias voltage and responsive to a ring voltage on the ring node being less than the bias voltage, the negative clamp circuit is configured to clamp the ring voltage at a first threshold voltage. The apparatus also includes a peak detector circuit coupled to the ring node of the voltage divider circuit and configured to detect a peak amplitude of the ring voltage.

Abstract: In described examples, bootstrap diode circuits include a first diode having a first diode input coupled to a voltage supply and a first diode output. Described bootstrap diode circuits additionally include a second diode having a second diode input coupled to the first diode output and a second diode output and a plurality of zener diodes coupled in series. The series-coupled zener diodes are further coupled in parallel with the second diode.

Abstract: Bootstrap diode circuits are disclosed. Example bootstrap diode circuits disclosed herein include a first diode having a first diode input coupled to a voltage supply and a first diode output. Disclosed bootstrap diode circuits additionally include a second diode having a second diode input coupled to the first diode output and a second diode output and a plurality of zener diodes coupled in series. The plurality of series-coupled zener diodes are further coupled in parallel with the second diode.

Abstract: A switched driver for a power supply includes a high-side switch and a low-side switch coupled to the high-side switch. An output is coupled between the high-side switch and the low-side switch. A switch controller is coupled to either the high-side switch or the low-side switch and has a switch controller input for receiving a switch control signal and an output for controlling a switch. The switch controller initially reduces the resistance of the switch, increases the resistance of the switch, and then reduces the resistance of the switch in response to a signal received at the input.

Abstract: Bootstrap diode circuits are disclosed. Example bootstrap diode circuits disclosed herein include a first diode having a first diode input coupled to a voltage supply and a first diode output. Disclosed bootstrap diode circuits additionally include a second diode having a second diode input coupled to the first diode output and a second diode output and a plurality of zener diodes coupled in series. The plurality of series-coupled zener diodes are further coupled in parallel with the second diode.