Part Number:DRV8840
Further to query attached here in link below
I have tested same drv8840 circuit in my setup as a 12V, 3amp peltier controller. And there are 3 temperature set points : 25, 30, 37 celcius. Hardware configuration done so far as follows:
- Purpose of trial : heating of peltier from 25 to 37 celcius, Enable = Logic 1 (5V), Phase = logic 1, decay = 1 R Sense = 0 , observation: initial temp 30 and reached 37 after 5 mins ( ok as per our requirement)
- Purpose : cooling of peltier from set point 37 to 25 celcius , Enable = logic 1, phase = logic 0, decay = 1 , R sense = 0, observation : taking 30+ mins for reaching required set point 25 celcius from 37 celcius
- Purpose cooling from 37 to 25 with driver off, Enable = logic 0 , observation: 30+ mins for reaching
30+ mins for 25 setpoint from 37 is too much , 15 mins waiting time is ok. For heating Phase pin status = Logic "1" and for cooling phase pin = Logic "0"
So can you suggest what will be hardware config (I4..I0 and decay,phase,Enable pin) setting to do fast cooling of peltier ?