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Std Edition7.4V Lithium charger

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Published Time:2018-07-24 20:15:46
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Description

This charger uses two LM317 to make up a CC and CV mode which is toggled by an Op-Amp comparator.

Documents

7.4 Charger PCB

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ID Name Designator Footprint Quantity Mounted
1 LM317BTG U1,U2 TO-220(TO-220-3) 2 Yes C14502
2 spdt 12v relay U5 5 PIN SPDT RELAY 1 Yes
3 1N4007 D2,D1 DO-41 2 Yes
4 470R R2,R1 AXIAL-0.3 2 Yes
5 DC JACK IN_+12V DC JACK (123) 1 Yes
6 LED 5MM LED1,LED2 LED 5MM 2 No
7 4.7R R3,R9,R10 AXIAL-0.3 3 Yes
8 560R R4 AXIAL-0.3 1 Yes
9 3.3k R51 AXIAL-0.3 1 Yes
10 Header-Female-2.54_1x2 P1 HDR-1X2/2.54 1 Yes C49661
11 screw_terminal_connector U3 SCREW TERMINAL 1 Yes
12 BC547B Tube Q1 TO-92(TO-92-3) 1 Yes C2092
13 1k R6 AXIAL-0.3 1 Yes
14 LM358AN U4 LM358AN 1 Yes
15 10k R7 AXIAL-0.3 1 Yes
16 22k R8 AXIAL-0.3 1 Yes

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