Semiconductor device with upper and lower switching devices and isolation transformer
AssigneeRohm Co., Ltd.
InventorMotohiro Ando
Life of this patent
Estimating the term…
Abstract
Provided is a semiconductor device that has a configuration provided with: a driving unit for driving an upper switching element and a lower switching element according to a control signal for controlling the driving of the upper switching element and the lower switching element, which are connected in series to constitute a bridge circuit; an insulating unit having an insulating transformer; and a package for sealing at least a part of the insulating unit and the driving unit. The insulating unit transmits a signal corresponding to the control signal to the driving unit side while insulating the signal.
Claims19
A semiconductor device comprising:
- a plurality of upper switching devices and a plurality of lower switching devices connected in series to together constitute a bridge circuit;
- a driver configured to drive the upper switching devices and the lower switching devices, according to a control signal for controlling driving of the upper switching devices and the lower switching devices;
- an isolation transformer;
- and
- a package in which at least part of the upper switching devices, part of the lower switching devices, part of the isolation transformer, and part of the driver are sealed, wherein
- the isolation transformer is configured to transmit a signal corresponding to the control signal to the driver while isolating the signal,
- the plurality of upper switching devices are placed on a same island, and
- the plurality of lower switching devices are placed on separate islands respectively.
An electric power conversion device configured to perform electric power conversion by driving a plurality of upper switching devices and a plurality of lower switching devices connected in series to together constitute a bridge circuit, the electric power conversion device comprising:
- the plurality of upper switching devices;
- the plurality of lower switching devices;
- first and second drive circuit chips configured to drive the upper switching devices and the lower switching devices based on a signal corresponding to a control signal fed in from outside;
- an isolation transformer configured to isolate between the control signal and the signal for driving the first and second drive circuit chips;
- a circuit board on which at least the isolation transformer is mounted;
- and
- a package in which at least part of the upper switching devices, part of the lower switching devices, part of the circuit board, part of the isolation transformer, and part of the first and second drive circuit chips are sealed, wherein
- the isolation transformer is arranged in a region between the first and second drive circuit chips in a plan view,
- the plurality of upper switching devices are placed on a same island, and
- the plurality of lower switching devices are placed on separate islands respectively.
Dependencies are inferred from the claim text.