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德州仪器（TI）的bq27542-G1锂离子电池电量监测计是一款微控制器外设，可为单节锂离子电池组提供电量监测。该器件可实现精确的电池电量监测，并且对系统微控制器固件开发的要求极低。这款电量监测计驻留在电池组内或者内置电池（不可拆卸）的系统主板上。此电量监测计采用已获专利温度（°C）等信息。该器件还提供针对内部短路或电池端子断开事件的检测功能。
这款电量监测计还特有针对安全电池组认证（使用SHA-1 /HMAC认证算法）的集成支持功能。
所有商标均为其各自所有者的财产。
| Number of Series Cells |
| Cell Chemistry |
| Battery Capacity (Max) (mAh) |
| Communication Interface |
| Battery Capacity (Min) (mAh) |
| External Capacity Indication |
| Implementation |
| Gas Gauge Algorithm |
| Cell Balancing |
| Features |
| Operating Temperature Range (C) |
| Pin/Package |
| BQ27542-G1 | BQ27220 | BQ27320 | BQ27426 | BQ27510-G3 | BQ27520-G4 | BQ27546-G1 | BQ27621-G1 | BQ27750 | BQ28Z610 | BQ34110 | BQ34Z100-G1 | BQ35100 | BQ4050 | BQ40Z50-R1 | BQ78350-R1 | BQ78Z100 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single Cell | Single Cell | Single Cell | Single Cell | Single Cell | Single Cell | Single Cell | Single Cell | Single Cell | 1-2 Cells | 2-4 Cells >4 Cells Single Cell | 2-4 Cells >4 Cells Single Cell | 2-4 Cells >4 Cells Single Cell | 2-4 Cells Single Cell | 2-4 Cells Single Cell | >4 Cells | 1-2 Cells |
| Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer LiFePO4 | Li-Ion/Li-Polymer | Lead Acid Li-Ion/Li-Polymer LiFePO4 NiCd NiMH | Lead Acid Li-Ion/Li-Polymer LiFePO4 NiCd NiMH | Primary Lithium | Li-Ion/Li-Polymer LiFePO4 | Li-Ion/Li-Polymer LiFePO4 | Li-Ion/Li-Polymer LiFePO4 | Li-Ion/Li-Polymer |
| 32000 | 29000 | 29000 | 14000 | 16000 | 32000 | 32000 | 32000 | 14000 | 14000 | 29000 | 29000 | 32000 | 29000 | 29000 | 320000 | 14000 |
| HDQ I2C | I2C | I2C | I2C | I2C | I2C | HDQ I2C | I2C | I2C | I2C | I2C | HDQ I2C | I2C | SMBus | SMBus | I2C SMBus | HDQ |
| 100 | 100 | 100 | 100 | 300 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 500 | 100 | 100 | 100 |
| None | None | None | None | None | None | None | None | None | None | None | LED | None | LED | LED | LCD LED SOC | None |
| Pack | Pack System | Pack System | System | System | System | Pack | System | Pack | Pack | Pack System | Pack System | Pack System | Pack | Pack | Pack | Pack |
| Impedance Track | CEDV | CEDV | Impedance Track | Impedance Track | Impedance Track | Impedance Track | Dynamic Voltage Correlation | Impedance Track | Impedance Track | CEDV | Impedance Track | Primary | CEDV | Impedance Track | CEDV | Impedance Track |
| N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | External Internal | N/A | N/A | N/A | External Internal | External Internal | External Internal | External Internal |
| SHA-1 Authentication | N/A | N/A | N/A | N/A | N/A | SHA-1 Authentication | No Sense Resistor Required | Accumulated Coulomb Count Battery Management Unit Integrated Protector SHA-1 Authentication | Battery Management Unit Cell Balancing Integrated Protector SHA-1 Authentication | Accumulated Coulomb Count End of Service SHA-1 Authentication | SHA-1 Authentication | End of Service | Cell Balancing Integrated Protector SHA-1 Authentication | Cell Balancing Integrated Protector SHA-1 Authentication Turbo Mode | Cell Balancing Integrated Protector SHA-1 Authentication | Cell Balancing Integrated Protector SHA-1 Authentication |
| -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
| 12SON | 9DSBGA | 15DSBGA | 9DSBGA | 12SON | 15DSBGA | 15DSBGA | 9DSBGA | 12SON | 12SON | 14TSSOP | 14TSSOP | 14TSSOP | 32VQFN | 32VQFN | 30TSSOP | 12SON |
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