I am using four 4-multiplex LCD Drivers (V6118-4) to drive a 120 segment static LCD. This might sound stupid, but I will explain why later.
Basically, the driver comes as a replacement for the old static LCD driver V6108, however, the new driver consumes way too much current compared to the old one, and the circuit board, which uses a charge pump, simply cannot provide enough current for it to function properly.
Back when the circuit board was built, it used three V6108 40-segment Static LCD drivers, those static LCD drivers had a very low power consumption, which is good because the circuit runs on battery and needs to last. But when the new driver came, it had a significant higher power consumption, surprisingly.
I had to use this particular driver for my static LCD despite it being a multiplex driver, because it has the same pin configuration and can avoid modifications to the PCB. If I can't make it consume less, I'd have to build a new power supply, and the entire board will have to be redesigned.
Is there any way to reduce the power consumption of a multiplex LCD driver?
V6108 datasheet: http://pdf.datasheetcatalog.com/datasheets2/33/339105_1.pdf
V6118 datasheet: http://www.emmicroelectronic.com/sites/default/files/public/products/datasheets/v6118_ds.pdf
Basically, the driver comes as a replacement for the old static LCD driver V6108, however, the new driver consumes way too much current compared to the old one, and the circuit board, which uses a charge pump, simply cannot provide enough current for it to function properly.
Back when the circuit board was built, it used three V6108 40-segment Static LCD drivers, those static LCD drivers had a very low power consumption, which is good because the circuit runs on battery and needs to last. But when the new driver came, it had a significant higher power consumption, surprisingly.
I had to use this particular driver for my static LCD despite it being a multiplex driver, because it has the same pin configuration and can avoid modifications to the PCB. If I can't make it consume less, I'd have to build a new power supply, and the entire board will have to be redesigned.
Is there any way to reduce the power consumption of a multiplex LCD driver?
V6108 datasheet: http://pdf.datasheetcatalog.com/datasheets2/33/339105_1.pdf
V6118 datasheet: http://www.emmicroelectronic.com/sites/default/files/public/products/datasheets/v6118_ds.pdf
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