HOBBYWING 5V/ 6V RC UBEC 3A-5A

HOBBYWING 5V/6V RC UBEC 3A-5A Lowest RF Noise BEC

1.1 Output: 5V/3A and 6V/3A switchable
1.2 Ripple: <50mVp-p(@2A/12V)
1.3 Input: 5.5V-26V (2-6 cells Li-po battery pack or 5-18 cells NiMH battery pack)
1.4 Size: 41.6mm*16.6mm*7mm (L*W*H)
1.5 Weight: 11g

2.Features:
2.1 The UBEC is an advanced switching regulator with over-current and over-heat protection function, and the maximum efficiency of the system is nearly 90%.
2.2 The small size and the light weight make it very convenient to use.
2.3 The comparison of linear BEC and 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 back has a typical voltage of 14.8V,in order to let BEC output 5V/1A,the current flow into the 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 the linear mode BEC is just 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 output 5V/1A, the current flow into BEC is only 0.38A(actual test data),so the power on BEC is 14.8*0.38A=5.6W,and the efficiency of BEC is 5W/5.6W=89.3%.

2.4 A shield covers almost all the electronic components on PCB, and a ferrite ring is attached with the output wires to decrease the electromagnetic interference.