Hi,
We designed custom buck converter (LM25085) using web bench for
input voltage = 10.1 V to 12.6V
output voltage = 9.8V
current output = 8A
Resistive load =1.8 to 2 ohm
output voltage when
- load is connected = 3.25V, 2.2A
-
- voltages at the following pins are
- Adj= 11.70V
- RT= 1.70V
- FB= 0.38V
- Vin = 12.08V
- Vcc= 4.33V
- Pgate = 10.74V
- Isns= 12.07V
- When the voltage is measured across adj and gnd, the measured voltage is 11.67V and the output current goes up to 4A
- load is not connected = 9.76V
- adj= 12.1V
- rt= 1.77V
- fb= 1.24V
- Vin= 12.28V
- Vcc= 4.51V
- Pgate= 12.25V
- Isns= 12.28V
The inductor ( SMMS1050-1R2M) gets heated.
the datasheet of inductor is attached below
Could you please suggest what might have gone wrong?
Thank-you
Warm regards
Harini Krishna