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MAX17044 Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX17044 Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 14 page Compact, Low-Cost 1S/2S Fuel Gauges with Low-Battery Alert 10 ______________________________________________________________________________________ Figure 6 shows an example application for a 1S cell pack. The MAX17043 is mounted on the system side and powered directly from the cell pack. The external RC networks on VDD and CELL provide noise filtering of the IC power supply and A/D measurement. In this example, the ALRT pin is connected to the micro- processor's interrupt input to allow the MAX17043 to signal when the battery is low. The QSTRT pin is unused in this application, so it is tied to GND. Figure 7 shows a MAX17044 example application using a 2S cell pack. The MAX17044 is mounted on the sys- tem side and powered from a 3.3V supply generated by the system. The CELL pin is still connected directly to PACK+ through an external noise filter. The ALRT pin is left unconnected because the interrupt feature is not used in this application. After power is supplied, the system watchdog generates a low-to-high transition on the QSTRT pin to signal the MAX17044 to perform a quick-start. PACK- PACK+ PROTECTION IC (Li+/POLYMER) SYSTEM VSS SYSTEM VDD BATTERY SYSTEM MAX17043 CELL EP 1 µF 1k Ω 10nF 150 Ω GND CTG SCL SDA QSTRT VDD ALRT SYSTEM µP I2C BUS MASTER INTERRUPT INPUT 4.7k Ω Figure 6. MAX17043 Application Example with Alert Interrupt PACK- PACK+ PROTECTION IC (Li+/POLYMER) SYSTEM VSS SYSTEM VDD BATTERY SYSTEM MAX17044 CELL 1 µF 1k Ω GND CTG SCL SDA QSTRT VDD SYSTEM PMIC SYSTEM µP I2C BUS MASTER 3.3V OUTPUT WATCHDOG ALRT EP Figure 7. MAX17044 Application Example with Hardware Reset |
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Similar Description - MAX17044 |
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