Using SN74HC595DR Shift Register we are driving the 7 segment display and switching at around 70Hz.
Supply voltage = 5V
Switching Frequency = 70Hz
Series Resistor value = 39ohms
Peak Voltage drop across series resister is 1.2V
Current per channel - 30.7mA.
Current at 8 channel - 245mA
But as per absolute maximum rating per channel 35mA and total current from all channel is 70mA continuous only.
Please suggest or provide details about what would be Switching current capability per channel and total switching current .
Best Regards
Arulmurugan P