Abstract: Control circuits for DC-DC power converters. In one example, a control circuit includes a voltage control loop configured to produce a control voltage based on an output voltage of a DC-DC converter and a reference voltage, and a current control loop configured to produce a control current based on the control voltage. The current control loop may be further configured to adjust the control current based on a signal proportional to an input voltage of the DC-DC converter to provide an adjusted control current that is inversely proportional to the input voltage, and to produce, based on the adjusted control current and an inductor current in an inductor of the DC-DC converter, a drive signal to drive one or more power transistors of the DC-DC converter.

Abstract: A power converter includes a power stage circuit having a control input and an output. A pulse width modulation (PWM) controller has a control output coupled to the control input of the power stage. A compensator includes a passive component and a switch coupled to the passive component. The switch has a switch control input coupled to the control output of the PWM controller.

Abstract: In an example, a system includes a buried Zener diode having a first terminal coupled to a voltage terminal. The system also includes a first resistor having a first terminal coupled to a second terminal of the buried Zener diode. The system includes a second resistor having a first terminal coupled to a second terminal of the first resistor. The system also includes a first transistor having a control terminal coupled to the first terminal of the second resistor. The system includes a second transistor having a control terminal coupled to a second terminal of the second resistor and an emitter coupled to an emitter of the first transistor. The system also includes a resistor network coupled to the second terminal of the first resistor, where the resistor network is configured to produce a reference voltage.

Abstract: In one example, an apparatus comprises a voltage reference circuit. The voltage reference circuit has a voltage reference terminal and includes a first circuit, a first semiconductor junction device, and a second semiconductor junction device coupled between the voltage reference terminal and a ground terminal. The first circuit is configured to generate a first voltage that increases with a temperature. The first semiconductor junction device is configured to generate a second voltage that decreases with the temperature. The second semiconductor junction device is configured to generate a third voltage that decreases with the temperature. The voltage reference circuit is configured to generate a fourth voltage between the voltage reference terminal and the ground terminal based on a sum of the first voltage and a combination of the second and third voltages.

Abstract: The techniques and circuits, described herein, include solutions for auto-zeroing in auto-zero amplifiers in the presence of high frequency alternating current (AC) noise. In some aspects, first and second inputs of an auto-zero amplifier are coupled to a differential voltage with high AC noise. During an auto-zero phase, a first switching network decouples the inputs of a first amplifier, comprised within the auto-zero amplifier, from the differential voltage with high AC noise. In some examples, the inputs of the first amplifier may be connected to a regulated direct current (DC) voltage. The regulated DC voltage provides a more accurate auto-zero for the auto-zero amplifier, such that higher overall accuracy is achieved during an operation phase.

Abstract: A system includes a switching converter and a circuit coupled to the switching converter. The circuit includes monitoring circuitry and a switch coupled to the switching converter. The circuit also includes a transconductance stage having a first transconductance input, a second transconductance input, and a transconductance output, the first transconductance input coupled to the monitoring circuitry and the transconductance output coupled to the switch. Additionally, the circuit includes a resistor having a first resistor terminal and a second resistor terminal, the first resistor terminal coupled to the transconductance output and to the switch; and a capacitor having a first capacitor terminal and a second capacitor terminal, the first capacitor terminal coupled to the second resistor terminal.

Abstract: A system includes: a switching converter circuit adapted to be coupled between an input voltage source and a load; and an integrated circuit adapted to be coupled between the input voltage source and a battery and configured to charge the battery. The integrated circuit has: a monitoring circuitry adapted to be coupled to the battery and configured to detect a transient fault condition of the integrated circuit; a power stage adapted to be coupled between the input voltage source and the battery, the power stage having a power switch; and a control circuit coupled between the monitoring circuitry and the power stage, the control circuit configured to provide a control signal to adjust a conductivity of the power switch responsive to a detected transient fault condition.

Abstract: A method includes receiving, by a regulating circuit, a battery feedback parameter and producing, by an operational transconductance amplifier, a first output current at an output terminal based on the battery feedback parameter and a battery current regulation voltage. The method also includes producing, by a current source, a second current at the output terminal based on the battery feedback parameter and a reference voltage.

Abstract: A device includes an amplifier having inverting and non-inverting inputs and an output. The device includes a capacitor coupled to a first node and to ground, a resistor coupled to the first node and the amplifier output, and a first switch coupled to the first node and a current sink, which is coupled to ground. The device includes AND gate having inputs and an output coupled to control terminal of first switch. The device includes a first comparator having non-inverting and inverting inputs and an output coupled to an AND gate input; a second comparator having a non-inverting input coupled to the amplifier output, an inverting input coupled to a transistor stack, and an output coupled to an AND gate input; and a second switch coupled to the transistor stack and to a current source, the second switch having a control terminal coupled to the first comparator output.

Abstract: A switching converter controller includes a synchronization circuit having a first synchronization circuit input, a second synchronization circuit input, a first synchronization circuit output, and a second synchronization circuit output. The synchronization circuit is configured to: receive an early warning signal at the first synchronization circuit input; receive a load detection signal at the second synchronization circuit input; provide a first control signal at the first synchronization circuit output responsive to the early warning signal; and provide a second control signal at the second synchronization circuit output responsive to the load detection signal. The switching converter controller also includes a driver circuit configured to adjust an idle switch drive signal at a first driver circuit output and a power switch drive signal at a second driver circuit output responsive to the first control signal and the second control signal.

Abstract: A transient auxiliary converter includes: a transient auxiliary converter terminal; an inductor having a first side and a second side, the first side of the inductor coupled to the transient auxiliary converter terminal; a capacitor having a first electrode and a second electrode, the second electrode of the capacitor being coupled to ground; a first switch between the second side of the inductor and the first electrode of the capacitor; and a second switch between the second side of the inductor and ground. The first and second switches are operated in accordance with a charge mode and a transient response mode for the transient auxiliary converter. The charge mode builds up charge on the capacitor from charge at the transient auxiliary converter terminal. The transient response mode releases charge on the capacitor to the transient auxiliary converter terminal.

Abstract: In one example, an apparatus comprises: a first transistor coupled between a power terminal and a switching terminal; a second transistor coupled between the power terminal and a first sense terminal; a third transistor coupled between the switching terminal and a ground terminal; a fourth transistor coupled between a second sense terminal and the ground terminal; a first variable current source coupled to the first sense terminal; a second variable current source coupled to the second sense terminal; a processing circuit having first, second, third, and fourth inputs and first and second outputs, the first input coupled to the switching terminal, the second input coupled to the first sense terminal, the third input coupled to the ground terminal, the fourth input coupled to the second sense terminal, the first output coupled to the first variable current source, and the second output coupled to the second variable current source.

Abstract: In described examples of methods and control circuitry to control a multi-level power conversion system, the control circuitry generates PWM signals having a duty cycle to control an output signal. The duty cycle is adjustable in different switching cycles. States of the system's switches are adjustable in one or more intervals within the switching cycles. In response to a voltage across a capacitor of the system being outside a non-zero voltage range, the control circuitry adjusts states of the switches in two intervals to discharge or charge the capacitor in a given switching cycle.

Abstract: A system includes: a switching converter circuit adapted to be coupled between an input voltage source and a load; and an integrated circuit adapted to be coupled between the input voltage source and a battery and configured to charge the battery. The integrated circuit has: a monitoring circuitry adapted to be coupled to the battery and configured to detect a transient fault condition of the integrated circuit; a power stage adapted to be coupled between the input voltage source and the battery, the power stage having a power switch; and a control circuit coupled between the monitoring circuitry and the power stage, the control circuit configured to provide a control signal to adjust a conductivity of the power switch responsive to a detected transient fault condition.

Abstract: A device includes an amplifier having inverting and non-inverting inputs and an output. The device includes a capacitor coupled to a first node and to ground, a resistor coupled to the first node and the amplifier output, and a first switch coupled to the first node and a current sink, which is coupled to ground. The device includes AND gate having inputs and an output coupled to control terminal of first switch. The device includes a first comparator having non-inverting and inverting inputs and an output coupled to an AND gate input; a second comparator having a non-inverting input coupled to the amplifier output, an inverting input coupled to a transistor stack, and an output coupled to an AND gate input; and a second switch coupled to the transistor stack and to a current source, the second switch having a control terminal coupled to the first comparator output.

Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.

Abstract: A driver circuit includes two high-side switches and a single low-side switch, output inductor, and output capacitor. By having multiple high-side switches, the driver can regulate power from multiple charging devices. The high-side switches share a channel with an input capacitor for that channel and the channels are connected to the low-side switch at a common node. When the capacitor for one of the channels becomes charged quickly, the capacitor of the other channel will balance itself with the charged capacitor. To avoid damaging the high-side switches, a low-impedance bridge and driver circuit is connected between the channels.

Abstract: A power converter device includes a set of switches configured to switch between at least three input-side voltage levels to provide output pulses. The power converter device also includes a control circuit for the set of switches, wherein the control circuit configured to selectively switch the power converter device between a continuous conduction mode of operation (CCM) having a first charge per pulse and a discontinuous conduction mode of operation (DCM) having a second charge per pulse, the second charge per pulse being greater than the first charge per pulse.

Abstract: A driver circuit includes two high-side switches and a single low-side switch, output inductor, and output capacitor. By having multiple high-side switches, the driver can regulate power from multiple charging devices. The high-side switches share a channel with an input capacitor for that channel and the channels are connected to the low-side switch at a common node. When the capacitor for one of the channels becomes charged quickly, the capacitor of the other channel will balance itself with the charged capacitor. To avoid damaging the high-side switches, a low-impedance bridge and driver circuit is connected between the channels.

Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.