RC Model redundant BEC V2

7 months ago

Profile:I made my own redundant BEC module for RC models. It takes full battery voltage (usually 4 or 6 lithium cells in my case) and regulates it down to around 5 volts to power servos and other electronics.

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Description

My design uses two separate LM2576 switching regulators that power the output through diodes to isolate them. I also have an extra output filter to minimize ripple and voltage spikes. My goal with this project was to create something that is more heavy-duty and reliable than most cheap BEC modules for RC models you can buy.

Documents

PCB_RC Model redundant BEC V2

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BOM

ID Name Designator Footprint Quantity BOM_Manufacturer Part
1 1000uF C2,C5 CAP-D10.0XH10.5 2 RVT1C102M1010
2 100uF C1,C3,C4,C6 CAP-D8.0XH10.5 4 RVT1V101M0810
3 SSB44-E3/52T D1,D2,D3,D4 SMB_L4.6-W3.6-LS5.3-R-RD 4 SSB44-E3/52T
4 100uH L1,L3 IND-SMD_L13.5-W12.6_125CDMCC-DS 2 TMPC1206HP-101MG-D
5 22uH L2,L4 IND-SMD_L10.8-W10.0_SLO1040H 2 SLO1040H220MTT
6 FC-3215GHK-570A08 LED1,LED2 1206 LED AXBRI 2 FC-3215GHK-570A08
7 pad GND1,GND2,OUT1,VCC1 SMD-SOLDER-PAD-3X3MM_AXBRI 4 ?
8 3K3 R4,R10 1206 2 1206W4F9091T5E
9 1K R5,R6,R11,R12 1206 4 1206W4F9091T5E
10 0.33R R1,R2,R7,R8 R2512 4 RLH25FEER330
11 LM2576SX-ADJ U1,U2 TO-263-5 2 LM2576SX-ADJ

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