MAX17043G+T Maxim Integrated Products, MAX17043G+T Datasheet - Page 10

• Manufacturer Part Number: MAX17043G+T
• Description: IC 2-WIRE FG MODEL GAUGE LO BATT
• Manufacturer: Maxim Integrated Products
• Series: ModelGauge™r

Specifications of MAX17043G+T

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 2.5 V ~ 4.5 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 90-2771G+BTR

Compact, Low-Cost 1S/2S Fuel Gauges
with Low-Battery Alert
Figure 6. MAX17043 Application Example with Alert Interrupt
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 powered directly from the cell pack. The external
RC networks on V
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.
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______________________________________________________________________________________
DD
PROTECTION IC
PROTECTION IC
(Li+/POLYMER)
(Li+/POLYMER)
and CELL provide noise filtering of
BATTERY
BATTERY
PACK+
PACK+
PACK-
PACK-
1µF
1µF
1kΩ
1kΩ
CELL
QSTRT
CTG
GND
CELL
ALRT
CTG
GND
MAX17043
MAX17044
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.
EP
EP
QSTRT
ALRT
SDA
SCL
SDA
SCL
V
V
DD
DD
SYSTEM
SYSTEM
150Ω
10nF
4.7kΩ
INTERRUPT
INPUT
I
MASTER
3.3V OUTPUT
WATCHDOG
I
MASTER
2
2
C BUS
C BUS
SYSTEM PMIC
SYSTEM µP
SYSTEM µP
SYSTEM V
SYSTEM GND
SYSTEM V
SYSTEM GND
DD
DD