MAX17703
Production
The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17703 is a...
Datasheet
MAX17703 on Analog.com
Dears,
I have one PCB with two MAX17703 for one battery each (Lipo 6s/12Ah). If I connect only battery 1 and switch on the charging power supply (30V/30A), it works fine. If I connect only battery 2 and switch on the charger, it also works. But if I connect both batteries and switch on the charger, only the first battery charges. I have built 4 boards and all of them have the same issue.
The only thing the two MAX17703 share is the charging power supply, everything else is separate.
I really have no idea why it doesn't work. Can anyone help me or give me a tip?
Thank you very much.
Doenis
I have found out.
For those who have two or more MAX17703 with the same DCIN: You need to decouple EN/UVLO(pin17), DCIN(pin18) and VIN(pin20) from the high current path with a shottky. 
