Part Number:drv594
Hello,
I am using drv594 to drive a 12v/7A peltier for cooling application. I have used the schematic given by ti in application note.
I want to drive the drv594 at its maximum current 3A but currently is is giving only 1A current.
In following conditions output appears as 4.2V, 1A across the peltier:
supply voltage = 5V
Input control voltage IN+ = 0v - 2.5V
In following conditions output appears as 3.1V, 0.7A across the peltier:
supply voltage = 3.3V
Input control voltage IN+ = 0v - 1.5V
As DRV594 should drive the load current according to input control voltage applied to pin but in both supply voltage (5V and 3.3V) condition output current is not changing when there is change in input control voltage.
When i connect 2 peltier in parallel the total current drawn by the 2 peltier becomes 2A. Why this situation is happening?
I want to drive a single peltier at 3A.
What should be done to drive the driver at its maximum current capacity. Please suggest some solution.