A circuit arrangement for an electronic device having at least two semiconductor elements of the same type connected in parallel with each other. At least one first semiconductor element has a first characteristic and at least one second semiconductor element has a second characteristic. Each of the two characteristics is defined by at least one power loss. The at least one power loss of the at least one first semiconductor element has a first value, and the at least one power loss of the at least one second semiconductor element has a second value. The two values of the at least one power loss are different.

An output circuit outputs communication signals and communicates with an external device ED, and includes: a PNP first transistor, which is capable of outputting a collector current as the communication signals; and a first current source, which is capable of changing a base current of the first transistor, and which reduces the base current to a predetermined current value after the first transistor is turned on and before the first transistor is turned off.

A circuit may include a switching element configured to draw a positive current from a source/sink unit when the switching element is turned on, the source/sink unit including an inductance, the inductance emitting an excess positive current after the switching element is turned off. Additionally, the circuit may include a snubber circuit configured to absorb the excess positive current from the inductance of the source/sink unit, and deliver a negative current to the source/sink unit. In one example, the delivered negative current has a lower amperage and a longer duration than the positive current.

Disclosed by present disclosure are a Darlington transistor drive circuit, a Darlington transistor drive method and a switching power supply management chip. In this embodiment, the Darlington transistor is driven sectionally. At the beginning of the switching-on cycle, the driving of the primary transistor is not started temporarily, instead the drive source is used to drive the secondary transistor. After the secondary transistor is completely switched on, the drive source of the secondary transistor is switched off and the drive source of the primary transistor is switched on to drive the Darlington transistor. The primary and secondary transistor have been completely switched on, and the drive current of the secondary transistor never depend on the primary transistor, so the voltage at the input terminal of the secondary transistor can be smaller than the voltage at the control terminal of the secondary transistor. Such that the switching-on power loss is reduced.

An output circuit outputs communication signals and communicates with an external device ED, and includes: a PNP first transistor, which is capable of outputting a collector current as the communication signals; and a first current source, which is capable of changing a base current of the first transistor, and which reduces the base current to a predetermined current value after the first transistor is turned on and before the first transistor is turned off

A switching control circuit configured to control switching of a first switching device of a bridge circuit. The bridge circuit includes the first switching device on a power supply side thereof, and a second switching device on a ground side thereof and being coupled to the first switching device in series through a load. The switching control circuit includes an output circuit configured to delay a first drive signal inputted to the switching control circuit for turning off the first switching device for a predetermined period, and output a resultant signal, when a current flowing through the second switching device becomes an overcurrent and the second switching device is turned off, and a drive circuit configured to drive the first switching device in response to an output of the output circuit.

A switching element drive circuit that drives a main switching element by providing a control terminal of the main switching element with a drive signal that has asymmetric positive and negative potentials with respect to a reference potential, the main switching element including a ground terminal, which is a source terminal or an emitter terminal, and to which the reference potential is connected.

A method of dynamically adjusting a storage time of a bipolar junction transistor (BJT) in a switched mode power converter during a switching cycle includes generating a storage time reference signal responsive to an input voltage signal. A collector off signal is generated responsive to a comparison of a current sense signal to a collector off reference threshold signal. The current sense signal is representative of a switch current of the BJT. A base off reference threshold signal is generated responsive to the storage time reference signal and the collector off signal. A base off signal is generated responsive to a comparison of the current sense signal and the base off reference threshold signal. Charging of a base terminal of the BJT is discontinued responsive to the base off signal, and the base terminal of the BJT is discharged responsive to the collector off signal.

A differential switch circuit includes: a first transistor having a first terminal coupled with a first input terminal, a second terminal coupled with a first output terminal, and a control terminal coupled with a switch signal receiving terminal; a second transistor having a first terminal coupled with a second input terminal, a second terminal coupled with a second output terminal, and a control terminal coupled with the switch signal receiving terminal; a central switch element positioned between the control terminals of the first and second transistors; and a switch element control circuit for controlling the central switch element based on a switch signal. When the switch signal turns on the first and second transistors, the switch element control circuit turns off the central switch element, and when the switch signal turns off the first and second transistors, the switch element control circuit turns on the central switch element.

In a driving apparatus for switches connected in parallel to each other, drivers respectively turn on or off the switches. A temperature obtainer obtains a value of a temperature parameter correlating with a temperature of at least one of the first and second switches. A selector selects at least one of the switches as at least one drive target switch. A driver causes at least one of the drivers to turn on the at least one drive target switch during an on duration and thereafter turn off the at least one drive target switch in each target switching cycle. The selector adjusts the number of the selected at least one drive target switch based on the value of the temperature parameter.