STM86312

Maximum rating

7/24

dissipation + dynamic power consumption.

Where segment current = 3 mA, grid current = 15 mA, and LED current = 20 mA,

VFD driver dissipation = number of segments x 6 + number of grids/(number of grids + 1) x

30 (mW)

LED driver dissipation = number of LEDs x 20 (mW)

Example

VFD driver dissipation = 16 x 6 + 6/7 x 30 = 122

LED driver dissipation = 4 x 20 = 80

Dynamic power consumption = 5 x 5 = 25

Total 553 mW.