Other Parts Discussed in Thread: LM5170
Hi,
I am implementing a battery charger LM5170 for it. I recently bought the LM5170EVM-BIDIR dev kit and got it working for buck mode. If I do not connect a battery to the 12V side and send a pwm to ISETD pin, it will work and I can control the current so the battery can charge. But if i connect the battery at the begning and follow the procedure, it will not draw any current from the power source nor charge the battery.
Steps I followed: (Dev kit is configured to buck mode)
1. Disconnect the battery from 12V side.
2. Apply 30V to 48V side.
3. Apply a pwm to ISETD pin. (Now i can see the output voltage is like 20V since there is no load to push the current)
4. Connect the battery.
Now battery starts charging.
But if I connect the battery to the 12V side before step 2. It dosent generate an output voltage and the output voltage is always the battery voltage.
What is the issue in this setup?
