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SMalasGit
A repository for a 2s lithium ion BMS that utilizes the BQ28Z620. This IC is an all-in-one chip that features battery protection, cell balancing, battery charging, battery current and voltage monitoring, and gas gauging through an impedance measurement to give a precise value for charge left.
| Reference | Value | Description |
|---|---|---|
| IC1 | BQ28Z610DRZR-R1 | Battery Management Battery fuel gauge with integrated protector for 1-2 series packs 12-SON -40 to 85 |
| Q1 | ALS-PT19 | NPN phototransistor, collector/emitter |
| Q3,Q4 | TPN1R603P | |
| Q5 | 2N7002K | 0.38A Id, 60V Vds, N-Channel MOSFET, SOT-23 |
| Q6 | SSM6J507NU_LF | |
| U1 | MCP1799T-33202H/TT | |
| U2 |
| Stand-alone USB PD controller (with sink Auto-run mode), QFN-24 |
| U3 | ATtiny816-M |
|---|
| C1 | 4u7 | Unpolarized capacitor |
|---|
| C2-C4,C6-C8,C10 | 1u | Unpolarized capacitor |
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| C5,C11,C14-C18 | 0u1 | Unpolarized capacitor |
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| C9 | 2.2u | Unpolarized capacitor |
|---|
| D1 | ESDA25W | - Clamp - Ipp Tvs Diode Surface Mount SOT-323-5 |
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| D2 | CDBQR0130L | Schottky diode |
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| D3 | 150060VS75000 | Light emitting diode |
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| D4,D5 | ESDA25P35-1U1M |
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| D6 | BAS19 | 120V, 0.4A, High-speed Switching Diode, SOT-23 |
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| F1 | Fuse | Fuse |
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| J1 | MOLEX_105450-0101 |
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| R1 | 330 | Resistor |
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| R2,R3 | 4k7 | Resistor |
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| R4,R8 | 100k | Resistor |
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| R5,R7,R11-R15,R17 | 100 | Resistor |
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| R6 | 18k | Resistor |
|---|
| R9 | 1k | Resistor |
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| R10 | 470 | Resistor |
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| R16 | 5 | Resistor |
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| R18 | 1m | Resistor |
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| R19,R21 | 5.1k | Resistor |
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| R20,R22 | 10M | Resistor |
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| R23 | 10 | Resistor |
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| R24 | 10k | Resistor |
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| R25 | 0 | Resistor |
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| TH1 | NTCG103JX103DT1S | Temperature dependent resistor |
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| TP17 | SDA | test point |
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| TP18 | SCL | test point |
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| TP20 | VSS | test point |
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