A signal transmission device includes a signal transmission chip, and a first lead frame supporting the signal transmission chip. A first inductor spiral ring is on a surface of the signal transmission chip, a second inductor spiral ring is inside the signal transmission chip, a first bonding pad is electrically coupled between the first and second inductor spiral rings, a guard ring covers the first and second inductor spiral rings in a plan view, and bonding pads are outside of the guard ring. A direction of rotation between the first and second inductor spiral rings are different from each other. The signal transmission device further includes a semiconductor chip and a second lead frame supporting the semiconductor chip, wherein the signal transmission chip and the semiconductor chip face each other.

A resonant power converter controller comprising a control circuit configured to turn on a synchronous rectifier (SR) in response to a count of a number of times a drain voltage of the SR crosses below a turn on threshold based on a stored count and turns off the SR when the drain voltage crosses above a turn off threshold. The control circuit comprises a first comparator configured to generate a first detection signal in response to the drain voltage being less than the turn on threshold. A first turn on detection circuit generates a first turn on signal when the count reaches the stored count. A first turn off signal is generated in response to the drain voltage being greater than the turn off threshold. A drive circuit turns on and off the SR in response to the first turn on signal and the first turn off signal.

A resonant power converter controller comprising a control circuit configured to turn on a synchronous rectifier (SR) in response to a count of a number of times a drain voltage of the SR crosses below a turn on threshold based on a stored count and turns off the SR when the drain voltage crosses above a turn off threshold. The control circuit comprises a first comparator configured to generate a first detection signal in response to the drain voltage being less than the turn on threshold. A first turn on detection circuit generates a first turn on signal when the count reaches the stored count. A first turn off signal is generated in response to the drain voltage being greater than the turn off threshold. A drive circuit turns on and off the SR in response to the first turn on signal and the first turn off signal.

A multi-voltage domain device includes a semiconductor layer including a first voltage domain, a second voltage domain, and an isolation region that electrically isolates the first voltage domain and the second voltage domain in a lateral direction. The isolation region includes at least one deep trench isolation barrier. A layer stack is arranged on the semiconductor layer and includes a stack insulator layer, a first coil arranged in the stack insulator layer, and a second coil arranged in the stack insulator layer and laterally separated from the first coil in the lateral direction. The first and second coils are magnetically coupled to each other in the lateral direction. The first coil includes terminals arranged vertically over the first region and are electrically coupled to the first voltage domain, and the second coil includes terminals arranged vertically over the second region and are electrically coupled to the second voltage domain.

A multi-voltage domain device includes a semiconductor layer including a first voltage domain, a second voltage domain, and an isolation region that electrically isolates the first voltage domain and the second voltage domain in a lateral direction. The isolation region includes at least one deep trench isolation barrier. A layer stack is arranged on the semiconductor layer and includes a stack insulator layer, a first coil arranged in the stack insulator layer, and a second coil arranged in the stack insulator layer and laterally separated from the first coil in the lateral direction. The first and second coils are magnetically coupled to each other in the lateral direction. The first coil includes terminals arranged vertically over the first region and are electrically coupled to the first voltage domain, and the second coil includes terminals arranged vertically over the second region and are electrically coupled to the second voltage domain.

In a transmission circuit, a first pulse signal with a first frequency and a second pulse signal with a second frequency are output according to a rising edge and a falling edge of a first input signal, respectively. When a second input signal indicates an active level, the second pulse signal is output according to the falling edge of the first input signal and the second frequency is changed to a third frequency. In a reception circuit, a first level of a first output signal is changed to a second level according to a first induced signal via a transformer, the second level of the first output signal is changed to the first level according to a second induced signal via the transformer, and a second output signal is changed to an active level when a frequency of the second induced signal has changed to the third frequency.

An isolated gate driver includes a transformer including primary and secondary windings, a synchronous rectifier connected between the secondary winding and an output terminal of the isolated gate driver, a first switch including a first terminal connected to a supply voltage, a second switch including a first terminal connected to the supply voltage, a first damping resistance connected between a first terminal of the secondary winding and a second terminal of the first switch, a second damping resistance connected between a second terminal of the secondary winding and a second terminal of the second switch, a first inverter including an input connected to the first terminal of the secondary winding and an output connected to a gate terminal of the first switch, and a second inverter including an input connected to the second terminal of the secondary winding and an output connected to a gate terminal of the second switch.

Disclosed is a transmitting device for contactless transfer of electric energy by means of inductive coupling or by means of capacitive coupling to one or several receiving modules, each comprising a field receiving element for receiving electric energy, the transmitting device including: a plurality of transmitting modules, each including a field generating element for generating an alternating energy field and an electric energy source for providing an electric alternating quantity to the respective field generating element in a wired manner; and controller configured, in an energy transfer mode, to control the electric energy sources such that a plurality of the transmitting modules simultaneously generate one of the electric alternating fields each, wherein, in the energy transfer mode, the electric alternating fields are controlled in dependence on a singular value decomposition of a matrix depending on a coupling matrix, wherein the coupling matrix comprises coupling factors to several or to all of the field receiving elements for several or for all of the field generating elements.

A semiconductor switch drive device (3) includes a drive unit (10), a power supply unit (20), a switch (39), and a control unit (50). The drive unit (10) supplies a control signal to a semiconductor switch (Q) of a main circuit (2) and drives the semiconductor switch (Q). The power supply unit (20) supplies electric power to the drive unit (10). The switch (39) cuts off supply of electric power to the power supply unit (20) by detecting or controlling an overvoltage state on a primary side of the power supply unit (20). The control unit (50) switches a conductive state of the switch (39) on the basis of a voltage of a control terminal of the semiconductor switch (Q).

A driver interface for a switch-based circuit includes an AC coupling capacitor, a first diode or a first series of diodes, and a second diode or a second series of diodes connected in series with the first diode or first series of diodes but with an opposing polarity. The AC coupling capacitor removes a DC voltage from an input bi-level drive signal that does not have the appropriate high and low drive levels needed to switch a FET in the switch-based circuit between fully ON and fully OFF states. The first diode or first series of diodes and the second diode or second series of diodes clamp the resulting AC-coupled drive signal to produce an output bi-level drive signal having the high and low drive levels needed to switch the FET between fully ON and fully OFF states. The driver interface maintains the high and low drive levels of the output bi-level drive signal irrespective of any changes made to the duty cycle or pulse density of the input bi-level drive signal.