banh
Advanced Member level 1
hi,
i intend to use 1 MCU open-drain pin to drive 4 npn's as in the figure.
IoL of the pin is 10mA.
each npn needs to be injected 1mA into the base for saturation.
So, this is what i expect:
- when the NMOS of the port is off -> all the NPN are turned on and the leds will be lighted up.
- when the NMOS of the port is on -> all the NPN are off, and the leds are off.
i need your comments on this circuit.
thanks.
i intend to use 1 MCU open-drain pin to drive 4 npn's as in the figure.
IoL of the pin is 10mA.
each npn needs to be injected 1mA into the base for saturation.
So, this is what i expect:
- when the NMOS of the port is off -> all the NPN are turned on and the leds will be lighted up.
- when the NMOS of the port is on -> all the NPN are off, and the leds are off.
i need your comments on this circuit.
thanks.