BQ2018SN-E1

TEXAS INSTRUMENTS  BQ2018SN-E1  芯片, 电池电量计, 锂离子, 5.5V, SOIC-8

The is a Multi-chemistry Charge/Discharge Counter with high-speed 1-wire I/F HDQ. It works with an intelligent host controller, providing state-of-charge information for rechargeable batteries. The BQ2018 measures the voltage drop across a low-value series sense resistor between the negative terminal of the battery and the battery pack ground contact. By using the accumulated counts in the charge, discharge and self-discharge registers, an intelligent host controller can determine battery state-of-charge information. To improve accuracy, an offset count register is available. The system host controller is responsible for the register maintenance by resetting the charge in/out and self-discharge registers as needed. It also features 128 bytes of NVRAM registers. The upper 13 bytes of NVRAM contain the capacity monitoring and status information.

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Multifunction charge/discharge counter

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<12.5µV Resolves signals

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Internal offset calibration improves accuracy

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Internal temperature sensor for self-discharge estimation

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Single-wire serial interface

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REG output for low-cost microregulation

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Internal timebase eliminates external components

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Green product and no Sb/Br