Hobbywing 3A UBEC Output 5V/3A and 6V/3A switchable extenal BEC
The 3A-UBEC is a switch mode DC/DC regulator, it outputs a consistent safe voltage for the receiver, gyro and servos.
1.1 Output Voltage: 5V@3A or 6V@3A (Selectable by using a jumper connector)
2.1 Uses an advanced switch mode DC-DC regulator IC.
Output voltage selectable by using a jumper connector.
*This UBEC is an advanced switching regulator, provides over-current and over-heat protection function, and the
witching frequency is 300KHz.The max efficiency of this chip is 92%
*The smallest size and the lightest weight.
*Compare linear BEC with switch-mode BEC: When using a lithium battery pack more than 3s, a switch-mode BEC
has much higher efficiency than linear BEC.
*For a traditional linear BEC: For example?a 4s lithium battery pack has a typical voltage of 14.8V, in order to let
BEC outputs 5V/1A, the current flow into BEC is at least 1A, so the power on BEC is 14.8V* 1A=14.8W. But the
useful output power is only 5V*1A=5W, so the efficiency of BEC is 5W/14.8W=33.8%, the redundant power
14.8W-5W=9.8W changes to heat, which makes the BEC very hot.
*For a switch-mode BEC: In the above case, in order to let BEC outputs 5V/1A, the current flow into BEC is only
0.38A (actual test data), so the power on BEC is 14.8V* 0.38V=5.6W, and the efficiency of BEC is 5W/5.6=89.3%
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