Disclosed area channel circuit and an electronic device, including a power channel switch, a signal channel switch, a control module, and a comparison module. The power channel switch is connected between a circuit input end and a first circuit output end, and the signal channel switch is connected between the circuit input end and a second circuit output end. The comparison module is connected to the circuit input end and is configured to compare an input voltage with a specified voltage threshold, including a first voltage threshold, and feedback corresponding comparison results to the control module. The control module is configured to turn on the signal channel switch and turn off the power channel switch when the input voltage is lower than the first voltage threshold, and to turn on the signal channel switch when the input voltage is higher than the first voltage threshold.

Non-ideal diodes have a non-zero resistance across a PN junction when the junction is forward biased. When a diode comprising a power supply has a voltage drop across the junction that exceeds a predetermined threshold, the threshold-exceeding voltage drop trips a comparator, the output of which controls a switch between a power supply and a load.

Non-ideal diodes have a non-zero resistance across a PN junction when the junction is forward biased. When a diode comprising a power supply has a voltage drop across the junction that exceeds a predetermined threshold, the threshold-exceeding voltage drop trips a comparator, the output of which controls a switch between a power supply and a load.

Provided is a semiconductor device capable of preventing a malfunction of a high-side gate driver circuit that is caused by a negative voltage surge. A diode is connected between a p-type bulk substrate configuring a semiconductor layer, and a first potential (GND potential), and a signal is transmitted from a control circuit that is formed in an n diffusion region configuring a first semiconductor region through a first level down circuit and a first level up circuit to a high-side gate driver circuit that is formed in an n diffusion region configuring a second semiconductor region. As a result, a malfunction of the high-side gate driver circuit that is caused by a negative voltage surge can be prevented.

Provided is a semiconductor device capable of preventing a malfunction of a high-side gate driver circuit that is caused by a negative voltage surge. A diode is connected between a p-type bulk substrate configuring a semiconductor layer, and a first potential (GND potential), and a signal is transmitted from a control circuit that is formed in an n diffusion region configuring a first semiconductor region through a first level down circuit and a first level up circuit to a high-side gate driver circuit that is formed in an n diffusion region configuring a second semiconductor region. As a result, a malfunction of the high-side gate driver circuit that is caused by a negative voltage surge can be prevented.

Described are apparatus and methods for a load switch with reset and deep sleep capability. The slew rate control methods of the PMOS load switches contained in the load switch configuration is also described. A preferred slew rate control circuit includes a power PMOS transistor that is capable of handling load currents of several amperes along with an integrated controller. The integrated reset and deep sleep functions allow the user to control the basic timing control of the voltages that are required by the system and to save battery power in an extended deep sleep mode such as storage and shipping.

A circuit may include an electronic switch that has a load current path coupled between an output node and a supply node and that is configured to connect or disconnect the output node and the supply node in accordance with a drive signal. Further, the circuit includes a monitoring circuit that is configured to receive a current sense signal, which represents the load current passing through the load current path, and that is further configured to determine a protection signal based on the current sense signal, a state of the monitoring circuit, and at least one wire parameter. The wire parameter characterizes a wire that is—during operation—connected to the output node, and the protection signal is indicative of whether to disconnect the output node from supply node. Further, the circuit includes a protection circuit connected to the monitoring circuit.

Methods, apparatus, systems and articles of manufacture are disclosed for temperature insensitive voltage supervisors. An example apparatus includes a PTAT generation circuit including an output terminal: a first resistor having a first terminal and a second terminal, a second resistor having a third terminal and a fourth terminal, the third terminal coupled to the second terminal at a first node, a first transistor including a base terminal coupled to the fourth terminal of the second resistor at a second node, and a first current terminal coupled to the fourth terminal of the second resistor, a comparator including, a first input terminal coupled to the output terminal of the PTAT generation circuit at a third node, a second input terminal coupled to the second terminal and third terminal, and a third resistor having a fifth terminal coupled to the third terminal and the second input terminal at a fourth node.

The present disclosure describes a system and method for resetting firmware in an electronic accessory, such as a wearable electronic device, without a physical reset button on the accessory. A secondary device, such as a case for the accessory, can serve as a power source that initiates the reset. The reset may be manually initiated, for example by a user pressing a button, or automatically initiated, such as by the secondary device detecting that the accessory is unresponsive. The secondary device sends a reset command to the electronic accessory through a power line connection. The power line connection may be made, for example, upon contact of the accessory with the secondary device. In some examples, the reset command may be an elevated power level. Upon receiving the reset command through the power line, the accessory completes the reset.

The present disclosure describes a system and method for resetting firmware in an electronic accessory, such as a wearable electronic device, without a physical reset button on the accessory. A secondary device, such as a case for the accessory, can serve as a power source that initiates the reset. The reset may be manually initiated, for example by a user pressing a button, or automatically initiated, such as by the secondary device detecting that the accessory is unresponsive. The secondary device sends a reset command to the electronic accessory through a power line connection. The power line connection may be made, for example, upon contact of the accessory with the secondary device. In some examples, the reset command may be an elevated power level. Upon receiving the reset command through the power line, the accessory completes the reset.