Abstract: According to some embodiments, a pool cleaner includes a chassis, a housing supported by the chassis, at least one drive wheel supported by the chassis, and a turbine assembly that rotates in one of a first direction and a second direction to drive the at least one drive wheel. The pool cleaner also includes a timer disc assembly with at least one rotating timer disc. The timer disc assembly controls a flow of pressurized fluid away from the housing in a forward direction for backward propulsion assistance of the pool cleaner during a first time period, a rearward direction for forward propulsion assistance of the pool cleaner during a second time period, and a sideways direction for turning propulsion assistance of the pool cleaner during at least a portion of one of the first time period and the second time period.

Abstract: At least some embodiments are directed to a system comprising a capacitor coupled to a voltage supply rail and configured to carry a capacitor current that comprises first and second parts. The capacitor current is an alternating current (AC). A first current mirror component may couple to the capacitor and to the voltage supply rail and is configured to carry the first part of the capacitor current. A second current mirror component couples to the voltage supply rail and is configured to carry the second part of the capacitor current. The second part of the capacitor current is proportionally related to the first part of the capacitor current. A circuit couples to the second current mirror component. The capacitor and the first and second current mirror components are configured to attenuate a common mode noise current flowing to the circuit.

Abstract: A voltage converter circuit includes a high side transistor, a high side driver coupled to a control input of the high side transistor, a low side transistor coupled to the high side transistor at a switch node, and a current steering circuit coupled to the control input of the high side and to the switch node. During transition of the high side transistor to an on state, a current from the high side driver initially divides between the control input of the high side transistor and the current steering circuit, and as a voltage on the switch node increases, less of the current from the high side driver flows through the current steering circuit and more of the current from the high side driver flows to the control input of the high side transistor.

Abstract: In some examples, a controller device for a resonant mode power converter circuit comprises a feed-forward pin configured to receive an input voltage signal of the resonant mode power converter circuit, a feedback pin configured to receive an output voltage signal of the resonant mode power converter circuit, processing circuitry configured to determine a switching frequency based on the input voltage signal and the output voltage signal, a first control pin configured to deliver a first control signal to the first switch at the switching frequency, and a second control pin configured to deliver a second control signal the second switch at the switching frequency.

Abstract: In some examples, a controller device for a resonant mode power converter circuit comprises a feed-forward pin configured to receive an input voltage signal of the resonant mode power converter circuit, a feedback pin configured to receive an output voltage signal of the resonant mode power converter circuit, processing circuitry configured to determine a switching frequency based on the input voltage signal and the output voltage signal, a first control pin configured to deliver a first control signal to the first switch at the switching frequency, and a second control pin configured to deliver a second control signal the second switch at the switching frequency.

Abstract: In accordance with an embodiment, a method of operating a power supply includes detecting a loss of at least one of an AC input voltage an AC input power at an input of the power supply, and increasing a switching frequency of the power supply upon detection of the loss of the AC input voltage or AC input power.

Abstract: A power control integrated circuit (IC) chip can include a direct current (DC)-DC converter that outputs a switching voltage in response to a switching output enable signal. The power control IC chip can also include an inductor detect circuit that detects whether an inductor is conductively coupled to the DC-DC converter and a powered circuit component in response to an inductor detect signal. The power control IC chip can further include control logic that (i) controls the inductor detect signal based on an enable DC-DC signal and (ii) controls the switching output enable signal provided to the DC-DC converter and a linear output disable signal provided to a linear regulator based on a signal from the inductor detect circuit indicating whether the inductor is conductively coupled to the DC-DC converter and the powered circuit component.

Abstract: Some embodiments provide a pool cleaner having a housing including a bottom cover with a cover opening. A drive assembly is configured to drive one or more wheels. The pool cleaner further includes a supply mast, and a distributor manifold that receives water from the supply mast. A venturi vacuum assembly is in fluid communication with the distributor manifold, the venturi vacuum assembly designed to vacuum debris from a pool surface.

Abstract: A power control integrated circuit (IC) chip can include a direct current (DC)-DC converter that outputs a switching voltage in response to a switching output enable signal. The power control IC chip can also include an inductor detect circuit that detects whether an inductor is conductively coupled to the DC-DC converter and a powered circuit component in response to an inductor detect signal. The power control IC chip can further include control logic that (i) controls the inductor detect signal based on an enable DC-DC signal and (ii) controls the switching output enable signal provided to the DC-DC converter and a linear output disable signal provided to a linear regulator based on a signal from the inductor detect circuit indicating whether the inductor is conductively coupled to the DC-DC converter and the powered circuit component.

Abstract: A pool cleaner including a turbine assembly, a timer assembly, and a scrubber assembly. The timer assembly is configured to rotate the turbine assembly in a first direction and a second direction. The scrubber assembly is configured to rotate in a forward direction when the turbine assembly rotates in the first direction, and to rotate in a rearward direction when the turbine assembly rotates in the second direction.

Abstract: An integrated circuit (IC) provides an improved fail-safe signal to a circuit sharing a fail-safe pin at which the voltage can be greater than the voltage of an upper rail. The IC includes a first circuit segment that receives a first fail-safe signal and a first power-down signal and provides an intermediate signal, wherein the first fail-safe signal indicates when the voltage at the fail-safe pin is greater than the upper rail and the first power-down signal indicates when the module is powered down, and a second circuit segment connected to receive the intermediate signal and to provide the improved fail-safe signal to the module.

Abstract: A compensation circuit includes an amplifier coupled between a first voltage terminal and a common terminal. The amplifier has a first output terminal. A current source transistor has a current path coupled between a second voltage terminal and a second output terminal. A threshold voltage sense transistor has a current path coupled between the first and second output terminals. A gate and drain of the threshold voltage sense transistor are connected. An output transistor having a current path coupled between the first output terminal and a third output terminal has a gate coupled to the second output terminal.

Abstract: Aspects of the present invention provide a DC/DC converter for use with a supply voltage and operable to drive a load, wherein the DC/DC converter includes a VIN node, a VOUT node, a switching component, a filter, a comparator, a current detecting component and a control component. The VIN node can receive the supply voltage and the VOUT node can provide an output voltage to drive the load. The filter electrically connects the switching component with the VOUT node. The comparator can generate a comparison signal based on the output voltage. The current detecting component can detect when a current in a direction from the filter toward the VOUT node decreases to zero. The control component can control the switching component so as to provide the output voltage at the VOUT node in a discontinuous conduction mode to drive the load.

Abstract: Disclosed examples include programmable gain amplifier (PGA) circuits with an operation amplifier circuit having a first amplifier input and a second amplifier input including a plurality of second input nodes, a resistor array including a plurality of resistor sections connected in series with one another between the amplifier output and a reference voltage node, and a trim select circuit coupled between the second amplifier input and the resistor array circuit to deliver a feedback voltage signal to each individual one of the second input nodes from a given selected one of a plurality of the tap points of the resistor array circuit according to a trim code to provide analog gain trimming by interpolation.

Abstract: Embodiments of the invention provide a scrubber assembly for a pool cleaner comprising a center shaft and a rotary cylinder positioned around the center shaft and including an internal spur gear profile. The scrubber assembly further includes a first pinion gear engagable with the internal spur gear profile of the rotary cylinder and aligned off-center from the center shaft and a first end bracket coupled to a first end of the center shaft and rotatable about the first pinion gear.

Abstract: A compensation circuit includes an amplifier coupled between a first voltage terminal and a common terminal. The amplifier has a first output terminal. A current source transistor has a current path coupled between a second voltage terminal and a second output terminal. A threshold voltage sense transistor has a current path coupled between the first and second output terminals. A gate and drain of the threshold voltage sense transistor are connected. An output transistor having a current path coupled between the first output terminal and a third output terminal has a gate coupled to the second output terminal.

Abstract: A power control integrated circuit (IC) chip can include a direct current (DC)-DC converter that outputs a switching voltage in response to a switching output enable signal. The power control IC chip can also include an inductor detect circuit that detects whether an inductor is conductively coupled to the DC-DC converter and a powered circuit component in response to an inductor detect signal. The power control IC chip can further include control logic that (i) controls the inductor detect signal based on an enable DC-DC signal and (ii) controls the switching output enable signal provided to the DC-DC converter and a linear output disable signal provided to a linear regulator based on a signal from the inductor detect circuit indicating whether the inductor is conductively coupled to the DC-DC converter and the powered circuit component.

Abstract: Disclosed examples include programmable gain amplifier (PGA) circuits with an operation amplifier circuit having a first amplifier input and a second amplifier input including a plurality of second input nodes, a resistor array including a plurality of resistor sections connected in series with one another between the amplifier output and a reference voltage node, and a trim select circuit coupled between the second amplifier input and the resistor array circuit to deliver a feedback voltage signal to each individual one of the second input nodes from a given selected one of a plurality of the tap points of the resistor array circuit according to a trim code to provide analog gain trimming by interpolation.

Abstract: A system and method for facilitating electronic commerce over a network, according to one or more embodiments, includes communicating with a user via a user device and an issuer of payment media via an issuer device over the network, the payment media being issued to the user by the issuer, receiving user instruction over the network to link the payment media to a user account related to the user, prompting the user over the network to input a secure password known only by the issuer and the user, receiving the secure password from the user over the network, verifying that the payment media is owned by the user over the network via a secure protocol, returning a response to the user related to verification of the payment media, and storing payment media verification information.

Abstract: In an embodiment, a voltage regulator is disclosed. The voltage regulator circuit includes a switch, a first feedback circuit and a second feedback circuit. The switch is configured to receive an input signal at a first terminal and an error signal at a second terminal and configured to generate an output signal at a third terminal. The first feedback circuit includes a first transistor and a second transistor configured to control the error signal at the second terminal of the switch in response to a difference between the output signal and a reference signal. The second feedback circuit is configured to sense the error signal and generate a tail current at the second node and the fourth node to maintain substantially equal currents in the first transistor and the second transistor, respectively, thereby causing a voltage of the output signal as substantially equal to a voltage of the reference signal.