More integrated intelligent power module (IPM)
With the increasing cost of electronic circuits in the car, the reduction in size and weight, and the ever-increasing demands for higher reliability, smart power modules are better able to meet the trend. For example, ON Semiconductor's STK984 series integrates BLDCLV8907 and multiple independent power MOSFETs, eliminating the need for boards, sensors and external microcontrollers. It saves space, reduces weight and costs, and is used to drive automotive sliding doors and EPS units. Pumps, wipers, HVAC and cooling fans for greater reliability.
The STK984 series uses a unique insulated metal substrate technology (IMST) to integrate different components of semiconductor components and passive components and other components into a single module. The IMST structure covers the aluminum sheet by using an insulating layer, places the copper foil on the top layer, and etches it on the copper foil, so that the single-layer wiring pattern can be freely customized. Based on IMST-based IPM, power transistors, control circuits and protection circuits that provide temperature detection can be mounted on the same board, thereby minimizing temperature detection errors and achieving high-precision temperature detection; due to aluminum sheets on metal substrates and A distributed capacitor between the copper foil passes through the insulating resin to effectively reduce noise; in addition, the IMST structure provides excellent heat dissipation.
For example, the 3-phase brushless motor driver IPMSTK984-090A-E/091A-E has a built-in pre-driver IC, shunt resistor and charge pump circuit that integrates overcurrent, overtemperature, overvoltage/undervoltage protection and can be used in automotive blower fans. , cooling fans, pumps and sliding doors, etc.
Another example is the STK984-190-E integrating 7 MOSFETs into a single small package, using a direct-bond copper (DBC) substrate, no insulating liner, low thermal impedance, excellent heat dissipation and design flexibility, built-in reverse connection Battery protection, improved reliability, fully compliant with AEC-Q100 requirements, and motor power up to 300W for 12V systems. Compared with the discrete solution, STK984-190-E has 48.7%, 36.2%, 53.8% and 21.1% reduction in footprint, weight, component count and thermal resistance, respectively. It is ideal for automotive wiper, fan and pump applications. Device.
to sum up
In response to the trend of electronic functioning of automobiles, there are more and more motors for vehicles, and they have developed from brushed DC to brushless DC. As the requirements for size and weight reduction, system cost reduction, and higher reliability increase, there is a need to continuously increase integration. ON Semiconductor offers a comprehensive brushless motor solution, including discrete and integrated solutions such as the sensorless BLDCLV8907 and the more integrated IPMSTK984 series, addressing software programming, space, cost and design time challenges, providing greater energy efficiency , power density and system reliability are ideal for automotive applications such as pumps, oil pumps, fuel pumps, cooling fans, HVAC, wipers and sliding doors.
