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Can a DC-DC boost converter be connected in parallel?
At 12W, the lipo would need to provide 3.24A (assuming no power loss) to step up the voltage to 12V and providing 1A. However the DC-DC Boost coverter (XL6009) is rated at 2A continuous input. So I’ve decided to connect 3 DC-DC Boost converter in parallel, so each of them share the load and keep everything cooled down.
When do you parallel two dc-dc converters?
In that case you probably only need to parallel two supplies. You want the load sharing to be balanced such that neither supply needs more than 2A input at the worst case output voltage, which is 12.6V on the supply with the high output current, and 11.4V on the other supply. At 2A input the supply can output 2A * 5V * 92% / 12.6V = 730mA output.
What kind of transistor do I need for DC boost?
You can use a current mirror to actively and accurately divide the power load between your three DC-DC boosters. All you need is just one NPN transistor for each booster. I have used three cheap TIP31s, but any medium power type would do, as long as they are all the exact same model.
What happens if you short the output of a DC boost converter?
Short the output of this circuit and the source will start pumping all the current it can through the conductor which quickly saturates and becomes a short circuit. You can’t flip the MOSFET on the vertical axis but the upward voltage would forward bias the body diode and try to source current back to the input.
What is the tolerance of the xl6009 DC boost converter?
The XL6009 has a reference voltage tolerance of just under 3%, assuming a divider consisting of two 1% resistors is used to set the otput at 12V, then the total tolerance in the output is ±5%. So the output of each supply will be 12V ± 0.6V DC plus ripple.
What is maximum DC to DC converter output?
The voltage swing across speaker will rise to 2 times the output power is four times higher, the maximum output power 12.5W at Load 4 ohms. Or 25W at load 2 ohms. Disadvantages is must use 2 amplifier section per channel and power driver output is limited.