Another key to operating an integrated power management device in a high ambient temperature environment is for the device to self-monitor its own die temperature and report when its junction temperature is getting too high so that the system controller can make an intelligent decision on whether to reduce power to the load(s). Operating system software can do this by turning off less critical functions or by turning down the performance in processors and other high power functions such as displays and network communications.
The environment within a current vehicle’s dashboard is crowded with electronics. Adding to this crowding are radios from Bluetooth to cell phone based network connectivity. Therefore, it is imperative that any additional entries to this thermally constrained environment not contribute excessive heat or EMI. There are strict Electromagnetic Compatibility (EMC) requirements which cover radiated and conducted emissions, radiated and conducted immunity or susceptibility, and Electrostatic Discharge (ESD). Being able to conform to these requirements affects the