MAX17043 查看數據表（PDF） - Maxim Integrated

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MAX17043

1-Cell/2-Cell Fuel Gauge with ModelGauge and Low-Battery Alert

Maxim Integrated 

MAX17043/MAX17044

1-Cell/2-Cell Fuel Gauge with

ModelGauge and Low-Battery Alert

BATTERY

PROTECTION IC

(Li+/POLYMER)

PACK+

1kΩ

1µF

PACK-

SYSTEM

CELL

VDD

ALRT

MAX17043

QSTRT

CTG

SDA

GND EP SCL

150Ω 4.7kΩ

SYSTEM µP

INTERRUPT

INPUT

I2C BUS

MASTER

10nF

SYSTEM VDD

SYSTEM GND

Figure 6. MAX17043 Application Example with Alert Interrupt

BATTERY

PROTECTION IC

(Li+/POLYMER)

PACK+

1kΩ

1µF

PACK-

SYSTEM

CELL

VDD

QSTRT

MAX17044

ALRT

SDA

CTG

SCL

GND EP

SYSTEM PMIC

3.3V OUTPUT

WATCHDOG

SYSTEM VDD

I2C BUS

MASTER

SYSTEM µP

SYSTEM GND

Figure 7. MAX17044 Application Example with Hardware Reset

Figure 6 shows an example application for a 1S cell pack.

The MAX17043 is mounted on the system side and pow-

ered 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 microprocessor’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.

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