hugo_nz
Member level 2
max232 charge pump
Hi,
Does anyone know how well this would work:
Using a MAXIM RS232 driver IC (specifically the MAX3222) to generate a ~7.5V, 15mA supply to drive a white LED frontlight on a colour TFT LCD. How would this work when the serial port is in use? Not in use?
Are there any other ways people have used to get a white LED bias supply, "for free" i.e. without a dedicated IC.
We were also considering a diode/capacitor voltage doubler off of one of the switchmode supply rails.
Thanks
Hi,
Does anyone know how well this would work:
Using a MAXIM RS232 driver IC (specifically the MAX3222) to generate a ~7.5V, 15mA supply to drive a white LED frontlight on a colour TFT LCD. How would this work when the serial port is in use? Not in use?
Are there any other ways people have used to get a white LED bias supply, "for free" i.e. without a dedicated IC.
We were also considering a diode/capacitor voltage doubler off of one of the switchmode supply rails.
Thanks