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STD IP2312 Li-Ion Charger
License: CC-BY-SA 3.0
Mode: Editors' pick
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Update time：
2022-11-20 17:50:45
Creation time：
2022-10-30 12:09:22
Description
# IP2312 LiPo Charger
Single cell Li-Ion/LiPo synchronous switch-mode battery fast charging board (up to 3A) with USB Type-C port.
The [IP2312](https://datasheet.lcsc.com/lcsc/2101081834_INJOINIC-IP2312-4V35_C605433.pdf) is a synchronous switch step-down battery charging IC. It features:
- Synchronous switch step-down charging
- Charging efficiency 94% (3.7V/2A)
- Maximum charge current 3A
- Charging current external resistance can be adjusted
- Automatically adjust the input current, compatible with small current adapters
- Support 4.20V/4.30V/4.35V/4.4V battery
- Support charging NTC temperature protection
- Support LED charging status indication
- Built-in power MOS
- 750KHz switching frequency, can support 1uH inductor
- Input overvoltage and undervoltage protection
- IC over temperature protection
- Charging overtime protection
The maximum charging current can be set by resistor R4 (ISET):
ISET = R4 = 135kV / I_CHARGE
|Max Charging Current|R4 (ISET)|
|-:|-:|
|1A|135k|
|1.5A|91k|
|2.1A|n.c.|
|3A|45k|
The maximum charging voltage can be set by resistor R6 (VSET):
|Max Charging Voltage|R6 (VSET)|
|-:|-:|
|4.2V|n.c.|
|4.3V|43k|
|4.35V|75k|
|4.4V|100k|
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity | BOM_Supplier | BOM_Manufacturer | BOM_Manufacturer Part | BOM_Supplier Part |
|---|---|---|---|---|---|---|---|---|
| 1 | 10u | C1,C5 | C_0603 | 2 | LCSC | SAMSUNG | CL10A106KP8NNNC | C19702 |
| 2 | 22u | C2,C3,C4 | C_0603 | 3 | LCSC | MuRata | GRM188R60J226MEA0D | C77042 |
| 3 | KF301-2P | CN1 | KF301-2P | 1 | LCSC | Cixi Kefa Elec | KF301-5.0-2P | C474881 |
| 4 | 1uH | L1 | IND-706628_IND_0630_VAN | 1 | LCSC | Prosperity Dielectrics | MCS0630-1R0MN2 | C385251 |
| 5 | CHRG | LED1 | LED_0603 | 1 | LCSC | KENTO | KT-0603R | C2286 |
| 6 | FULL | LED2 | LED_0603 | 1 | LCSC | EVERLIGHT | 19-217/GHC-YR1S2/3T | C72043 |
| 7 | R500 | R1 | 0603 | 1 | LCSC | FOJAN | FRL0603JR500TS | C2930046 |
| 8 | 2R | R2 | 0603 | 1 | LCSC | UniOhm | 0603WAJ020JT5E | C25225 |
| 9 | 51k | R3 | 0603 | 1 | LCSC | UniOhm | 0603WAF5102T5E | C23196 |
| 10 | 45k | R4 | 0603 | 1 | LCSC | UniOhm | 0603WAF4532T5E | C23058 |
| 11 | 1k | R5 | 0603 | 1 | LCSC | UNI-ROYAL(厚声) | 0603WAF1001T5E | C21190 |
| 12 | 43k | R6 | 0603 | 1 | LCSC | UNI-ROYAL(厚声) | 0603WAF4302T5E | C23172 |
| 13 | 100R | R7,R8 | 0603 | 2 | LCSC | UNI-ROYAL(厚声) | 0603WAF1000T5E | C22775 |
| 14 | 5k1 | R9,R10 | 0603 | 2 | LCSC | UniOhm | 0603WAF5101T5E | C23186 |
| 15 | IP2312 | U1 | SOP-8_EP_150MIL | 1 | LCSC | INJOINIC(英集芯) | IP2312U_VSET | C605432 |
| 16 | USB-TYPE-C-6PIN | USB1 | USB-C-SMD-6P | 1 | LCSC | Korean Hroparts Elec | TYPE-C-31-M-17 | C283540 |
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