DS2745 Low Cost I2C Battery Monitor


DS2745 Low Cost I2C Battery Monitor RSS Sample
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Maxim Integrated
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Create a design and simulate using EE-Sim® tools: The DS2745 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge. The DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications. The DS2745 can be mounted on either the host side or pack side of the application. Current measurement and coulomb counting is accomplished by monitoring the voltage drop across an external sense resistor, voltage measurement is accomplished through a separate voltage-sense input, and temperature measurement takes place on-chip. A standard I²C interface with software programmable address gives the controlling microprocessor access to all data and status registers inside the DS2745. A low-power sleep mode state conserves energy when the cell pack is in storage.

* 16-Bit Bidirectional Current Measurement * 1.56µV LSB, ±51.2mV Dynamic Range * 104µA LSB, ±3.4A Dynamic Range (RSNS = 15mΩ) * Current Accumulation Register Resolution * 6.25µVhr LSB, ±204.8mVh Range * 0.417mAhr LSB, ±13.65Ah Range (RSNS = 15mΩ) * 11-Bit Voltage Measurement * 4.88mV LSB, 0V to 5V Input Range * 11-Bit Temperature Measurement * 0.125°C Resolution, -20°C to +70°C * Industry Standard I²C Interface * Low Power Consumption: * Active Current: 70µA typical, 100µA max * Sleep Current: 1µA typical, 3µA max

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