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Std edition 12V to 24V Battery Charger
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License: Public Domain
Description
The attached circuit is a 12V to 24V battery charger, originally designed for charging a 24V mobility scooter from a car 12V outlet. It has boost charge and trickle charge control, and can deliver upto 3A. It can be modified to deliver higher current by upgrading the MOSFET.
The PCB is designed to fit an Evatron REAS80 Extruded Aluminium Enclosure 80x64x30mm (Order Code: 30-3555 www.rapidonline.co.uk) 2 x Evatron RLS80 Mounting Lug Dovetails On Side of Any E-case Enclosure 80mm (Order Code: 30-3564) 2 x Evatron RPAN1 Natural Aluminium End Plate for Reas Type Enclosures 64x30mm (Order Code: 30-3565)
design drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 22uF | C1 | CAP-T7361-V | 1 |
| 2 | 100nF | C2,C6 | 0805 | 2 |
| 3 | 470nF | C3 | 0805 | 1 |
| 4 | 47uF | C4 | CASE-E_7343 | 1 |
| 5 | 220nF | C5 | 0805 | 1 |
| 6 | RS3MC | D1 | SMC(DO-214AB) | 1 |
| 7 | MBR1035 | D2 | TO-220AC | 1 |
| 8 | S1 | D3 | LED-5MM | 1 |
| 9 | S2 | D4 | LED-5MM | 1 |
| 10 | PWR | D5 | LED-5MM | 1 |
| 11 | 5A | F1 | F-2.50A-30V | 1 |
| 12 | 33uH | L1 | L123123 | 1 |
| 13 | IN | P1,P2 | WJ301V-5.00-2P | 2 |
| 14 | TIP147 | Q1 | TO-247_TO-3P_HORIZONTAL | 1 |
| 15 | BS170 | Q2,Q3,Q4,Q5 | SOT-23 | 4 |
| 16 | 2K | R1 | 0805 | 1 |
| 17 | 30K | R2 | 0805 | 1 |
| 18 | 1K | R3 | 0805 | 1 |
| 19 | 1.5K | R4 | 0805 | 1 |
| 20 | 0.2 | R5 | DIP-RES-24.5MMX8MM | 1 |
| 21 | 130R | R6 | 0805 | 1 |
| 22 | 480k | R7 | 0805 | 1 |
| 23 | 16k | R8 | 0805 | 1 |
| 24 | 47K | R9 | 0805 | 1 |
| 25 | 560k | R10 | 0805 | 1 |
| 26 | 240R | R11 | 0805 | 1 |
| 27 | 470R | R12 | 0805 | 1 |
| 28 | 2k2 | R13,R14,R15 | 0805 | 3 |
| 29 | LM2585S-ADJ | U1 | TS5B | 1 |
| 30 | BQ24450DWTR | U2 | DW16_N | 1 |
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