I am designing a high current LED driver circuit to power a matrix of pulsed IR LEDs. The LEDs will operate at 5A; 4.6V; 0.1ms pulses (~10 pulses at this frequency, wait 300s, repeat.) The device is powered off a 3.3V Li-Po battery.
In order to deliver sufficient power, I need a DC-DC converter as part of my driver circuit. I would have assumed that a boost converter would be a no-brainer for this application, however doing some reading seems to suggest that for such high-current applications, the size of properly rated inductors would start to become prohibitive, and so I am wondering if it is worth looking at charge pumps instead.
I've done some reading on it (https://www.maximintegrated.com/en/design/technical-documents/tutorials/7/725.html) and while the losses would be much higher than a boost converter, would the size and cost savings be significant enough to support the use of a simpler charge pump? Are there any drawbacks from a charge pump that makes it unusable for a battery-powered device?