Diodes Incorporated has introduced the DMP4015SPSQ 40V P-channel MOSFET designed to protect automotive electronic control units (ECUs) from the risk of reverse battery connections.
ECUs are used in more and more automotive control applications, and as some vehicles deploy up to 80 ECUs, the need to protect each ECU requires the MOSFET to provide a simple and cost-effective solution.
The DMP4015SPSQ MOSFET acts as an ideal diode, allowing current to flow when the battery is properly connected, and preventing current from flowing when the battery is accidentally reversed. Only a minimal number of passive components are required to drive the device. In contrast, N-channel MOSFETs require a charge pump to provide the gate drive voltage, adding complexity, cost, and component count. Eliminating the switching topology of the charge pump also avoids EMI radiation issues.
The rugged avalanche DMP4015SPSQ is 100% unclamped inductive switch (UIS) tested to ensure that the MOSFET can withstand the worst-case ISO7637 energy pulses that will occur if the power is disconnected while powering the inductive load. The low RDS (on) of DMP4015SPSQ is less than 11mohm, which can ensure that the power loss is minimized to achieve a lower operating temperature; this simplifies the consideration of heat dissipation design and improves reliability. The parallel configuration of several MOSFETs can further reduce the power loss by n2 times.
DMP4015SPSQ is available in PowerDI5060 package. For the same application, DMP4015SK3Q in TO252 (DPAK) package and DMP4015SSSQ in SO-8 package are also available.
