Lucast85
Member level 3
Improve output peak current capability of a DC/DC converter [16-140Vin -> 12/24 Vout]
Hi all,
I need of a DC/DC converter with output voltage of 12 V or 24 V (selelctable by resistor network on FB pin) and current capability of 400 mA. The input voltage range is 16-140V.
It seems the only DC/DC regulator IC is the new LTC7138.
Maybe with the output voltage of the DC/DC converter I have to drive the coil of a contactor that sink 1.6 A of current for about 75 ms when the contact are closing, then it sinks about 100 mA to maintain close the contacts.
That DC/DC is capable to drive up to 400 mA of continuous current.
In the datasheet i see that it is possible to use multiple ic in parallel but it is an expensive solution.
Is it possbile to increase the value of the output capacitor (e.g by using 4*4700 uF capacitors)? Counterindications?
Thanks,
Luca
Hi all,
I need of a DC/DC converter with output voltage of 12 V or 24 V (selelctable by resistor network on FB pin) and current capability of 400 mA. The input voltage range is 16-140V.
It seems the only DC/DC regulator IC is the new LTC7138.
Maybe with the output voltage of the DC/DC converter I have to drive the coil of a contactor that sink 1.6 A of current for about 75 ms when the contact are closing, then it sinks about 100 mA to maintain close the contacts.
That DC/DC is capable to drive up to 400 mA of continuous current.
In the datasheet i see that it is possible to use multiple ic in parallel but it is an expensive solution.
Is it possbile to increase the value of the output capacitor (e.g by using 4*4700 uF capacitors)? Counterindications?
Thanks,
Luca