Embodiments of the present invention disclose a battery switch on circuit and a lithium battery. The circuit includes a communication control module, a relay, a communication control circuit, a switch, and a communication connection terminal. A communication signal terminal of the communication control module is connected to a first contact of the relay, a common contact of the relay is connected to the communication connection terminal. A coil of the relay is powered on to control the common contact and the first contact to be gated and is powered down to control the common contact and a second contact of the relay to be gated. The communication connection terminal is configured to connect to an upper computer. The switch includes a first terminal, a second terminal, and a control terminal. A signal from the control terminal of the switch is capable of controlling conduction or disconnection between the first terminal and the second terminal. The first terminal of the switch is connected to a power supply, the second terminal of the switch is connected to a power input terminal, and after the power input terminal is powered on, the coil of the relay is powered on. A signal input terminal is connected to the second contact of the relay, and a control signal output terminal is connected to the control terminal of the switch. Whereby, an effect of normal power-on and communication after the entire circuit is powered off is realized.

An outdoor device reset system includes a voltage regulation apparatus coupled to a power supply apparatus and an outdoor device coupled to the voltage regulation apparatus. The voltage regulation apparatus is configured to regulate a working voltage input to the outdoor device based on a feedback signal, a supply voltage from the power supply apparatus for the voltage regulation apparatus, and a reference voltage of the voltage regulation apparatus. The outdoor device is configured to determine a change amount of the working voltage, and perform a reset operation when the change amount is within a preset range.

An outdoor device reset system includes a voltage regulation apparatus coupled to a power supply apparatus and an outdoor device coupled to the voltage regulation apparatus. The voltage regulation apparatus is configured to regulate a working voltage input to the outdoor device based on a feedback signal, a supply voltage from the power supply apparatus for the voltage regulation apparatus, and a reference voltage of the voltage regulation apparatus. The outdoor device is configured to determine a change amount of the working voltage, and perform a reset operation when the change amount is within a preset range.

A serial IGBT voltage equalization method and system based on an auxiliary voltage source is disclosed. The method includes the following steps. (1) Detect a port dynamic voltage of each serial IGBT. (2) Perform dynamic overvoltage diagnosis respectively on the port dynamic voltage of each IGBT. (3) Supply emergency high level signal to the gate of the IGBT when there is dynamic overvoltage. (4) Stop supplying emergency high level signal to the gate of the IGBT, supply a constant voltage at the gate of the IGBT through the auxiliary voltage source. The invention provides a constant voltage through the auxiliary voltage source, prolongs the off time of the faulty IGBT, and turns off other IGBTs simultaneously, thereby achieving the purpose of serial IGBT voltage equalization.

A serial IGBT voltage equalization method and system based on an auxiliary voltage source is disclosed. The method includes the following steps. (1) Detect a port dynamic voltage of each serial IGBT. (2) Perform dynamic overvoltage diagnosis respectively on the port dynamic voltage of each IGBT. (3) Supply emergency high level signal to the gate of the IGBT when there is dynamic overvoltage. (4) Stop supplying emergency high level signal to the gate of the IGBT, supply a constant voltage at the gate of the IGBT through the auxiliary voltage source. The invention provides a constant voltage through the auxiliary voltage source, prolongs the off time of the faulty IGBT, and turns off other IGBTs simultaneously, thereby achieving the purpose of serial IGBT voltage equalization.

A microcontroller includes an input pin and internal pull-up and pull-down circuits. External pull-up and pull-down circuits are also coupled to the input pin. The microcontroller is operable according to different configuration modes which include configuring the input pin in a floating state. A control logic then configures the internal pull-up and pull-down circuits according to an internal pull-up mode to acquire a first input voltage signal (at a first logic value) from the input pin, and further configure the internal pull-up and pull-down circuits according to an internal pull-down mode to acquire a second input voltage signal (at a second logic value) from the input pin. A selection of the operating mode of the MCU is then made based on the acquired first and second logic values.

A supply voltage detecting circuit has a voltage detection circuit and a current clamping circuit. The voltage detection circuit receives and detects a supply voltage and is used to detect to generate a low-voltage detection signal. When the supply voltage is lower than a set level, the low voltage detection signal output by the voltage detection circuit turns off the current clamping circuit, and a transistor current flowing through the voltage detection circuit is proportional to the supply voltage; and when the supply voltage is higher than or equal to the set level, the low voltage detection signal output by the voltage detection circuit turns on the current clamping circuit, and the current clamping circuit provides a constant current to maintain the operation of the voltage detection circuit, wherein the transistor current flowing through the voltage detection circuit is proportional to the constant current.

An integrated circuit (IC) includes: an input terminal; an output terminal; a first reference voltage terminal and a second reference voltage terminal; a high-side power switch coupled between the first reference voltage terminal and the output terminal; a low-side power switch coupled between the output terminal and the second reference voltage terminal; a first combinational logic and a second combination logic that are coupled to the input terminal; a first driver coupled between the first combinational logic and the high-side power switch; a second driver coupled between the second combinational logic and the low-side power switch; and first comparators coupled to the second combinational logic, where the first comparators are configured to compare a voltage difference between load path terminals of the high-side power switch with a first threshold and a second threshold.

A method of generating multiple gating signals for a multi-gated input/output (I/O) system. The system includes an output level shifter and an output driver which are coupled in series between an output node of a core circuit and an external terminal of a corresponding system. The method includes: generating first and second gating signals having corresponding first and second waveforms, the first waveform transitioning from a non-enabling state to an enabling state before the second waveform transitions from the non-enabling state to the enabling state; receiving the first gating signal at the output level shifter; and receiving the second gating signal at the output driver.

A power-on reset circuit 10 has: an enhancement-type PMOS transistor P1 whose source is connected to VDD and whose drain is connected to node VJG; a depletion-type NMOS transistor D1 whose drain is connected to the node VJG; a first resistor portion having resistors R1, R2 that are connected in series, and whose one end is connected to a source of the depletion-type NMOS transistor D1, and whose another end is connected to GND, and at which a region between the resistors R1, R2 is connected to a gate of the enhancement-type PMOS transistor P1; and an inverter whose input is connected to the node VJG, and that outputs a reset signal.