Mosaic
Well-Known Member
Hi all:
I need about 16V from a 12V supply to drive a pair of 5," 7 segment displays adequately. Perhaps 40mA peak per segment @ 50% DC.
Using only 7 segments (no DP) => 280mA total load current.
I am considering this part to do the job.
https://www.ti.com/lit/ds/symlink/tps61160.pdf
Does it look up to the task? It seems setup to drive a constant current @ whatever voltage needs to be developed.
If so I need one of these for each of the segment strings in use...or 7 of them. I could drive the segment strings via the PWM input as a Hi/Lo on/off arrangement and clamp the max string voltage with 16V zeners to prevent spiking when switching signals from one digit to the next.
Would 'blanking' all the segments before switching digits and then 'activating' the segments negate the need for the zeners?
I need about 16V from a 12V supply to drive a pair of 5," 7 segment displays adequately. Perhaps 40mA peak per segment @ 50% DC.
Using only 7 segments (no DP) => 280mA total load current.
I am considering this part to do the job.
https://www.ti.com/lit/ds/symlink/tps61160.pdf
Does it look up to the task? It seems setup to drive a constant current @ whatever voltage needs to be developed.
If so I need one of these for each of the segment strings in use...or 7 of them. I could drive the segment strings via the PWM input as a Hi/Lo on/off arrangement and clamp the max string voltage with 16V zeners to prevent spiking when switching signals from one digit to the next.
Would 'blanking' all the segments before switching digits and then 'activating' the segments negate the need for the zeners?
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