Hi Hi Everyone
Anyone ever used the above device? I'm concerned about the absolute maximum rating for the K input, which, according to the data sheet, is not permitted to exceed Vs. I assume that that Vs is intended to be the battery voltage, and this can differ from point to point around the vehicle, and that the K pin is meant to be pulled up to Vs at the chip.
Scenario:
- Two 9613's, in different places on the vehicle, have their K pins are connected together by a wire,
- The wire is pulled up to Vs locally at each device by a 5k resistor,
- Both devices are off,
- Vs at one end is 13.5V, at the other end 12V
In the above, the wire will try to sit at 12.75V (the lower Vs plus half the difference, due to the divider action of the resistors), and therefore the data sheet rating for the device at 12V will be exceeded.
Any opinions/experience?
Cheers
Geoff