Parallel two voltage source

[Vindhyachal.takniki]

1. Need to have two parallel "Mobile power bank" outputs. Each voltage source can max supply 5V/2.4Amps. 
2. Load can vary from 0Amps to 4.8Amps.
3. Load sharing need not to be equal, but each voltage source max current has to be limited to max 2.4Amps.


4.I tried LTC4415 ? Tried simualting in LTspice. But its shows 3V output at 4AMps load, where each voltage source is 5V. What am i doing wrong here?


5. Also its a cost sensitive application, if anything more cost effective is available then please suggest that also.

[Zero999]

1. Need to have two parallel "Mobile power bank" outputs. Each voltage source can max supply 5V/2.4Amps. 
2. Load can vary from 0Amps to 4.8Amps.
3. Load sharing need not to be equal, but each voltage source max current has to be limited to max 2.4Amps.


4.I tried LTC4415 ? Tried simualting in LTspice. But its shows 3V output at 4AMps load, where each voltage source is 5V. What am i doing wrong here?


5. Also its a cost sensitive application, if anything more cost effective is available then please suggest that also.

Take another look at the data sheet.
___
EN2 is active low and you have it tied to 5V, which disables it, meaning power is only drawn from V1.
https://www.analog.com/media/en/technical-documentation/data-sheets/4415fa.pdf

[Capernicus]

You can do it from 2 capacitor banks, instead of using transistors, im pretty sure.

[Zero999]

You can do it from 2 capacitor banks, instead of using transistors, im pretty sure.

How? Please post a schematic.

[David Hess]

What you are asking for is relatively easy to do if you accept some voltage drop.  A current shunt is added in series with each output, or more likely ground in this case, and an operational amplifier is used to drive the second pass element to force the current from one output to equal the other output.  This configuration is used to force current sharing when linear regulators are used in parallel.

[Vindhyachal.takniki]

seems like LT4353 is right solution, but its bit expensive with all external component cost.

[Zero999]

If you want cheap, then why not use the classic discrete ideal diode circuit? It requires P-MOSFETs though, which are more expensive, given the same voltage drop. For the circuit to work well, the BJTs need to be matched, ideally with a simiilar h_FE and more importantly the same V_BE. Fortunately it's possible to buy BJTs in matched pairs, ICs containing two BJTS on the same bit of silicon, so they have the same characteristics. The thread linked below recommends the DMMT5401, which isn't expensive.



https://electronics.stackexchange.com/questions/223935/understanding-an-ideal-diode-made-from-a-p-channel-mosfet-and-pnp-transistors