Rainbow Electronics MAX17047 - Manual (Page 7)

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MAX17047
ModelGauge m3 Fuel Gauge
Pin Description
Pin Configuration
PIN NAME FUNCTION
1 V
TT
Supply Input for Thermistor Bias Switch. Connect to supply for ratiometric AIN pin-voltage measurements.
In most applications, connect V
TT
to V
BATT
.
2 AIN
Auxiliary Voltage Input. Auxiliary voltage input from external thermal-measurement network. AIN also
provides battery insertion/removal detection. Connect to V
BATT
, if not used.
3 SCL Serial Clock Input. 2-wire clock line. Input only.
4 SDA Serial Data Input/Out. 2-wire data line. Open-drain output driver.
5 CSN Sense Resistor Connection. System ground connection and sense resistor input.
6 CSP Chip Ground and Sense Resistor Input
7 REG Voltage Regulator Bypass. Connect a 0.1FF capacitor from REG to CSP.
8 ALRT
Alert Indication. An open-drain n-channel output used to indicate specified condition thresholds have been
met. A 200kI pullup resistor to power rail is required for use as an output. Alternatively, ALRT can operate
as a shutdown input with the output function disabled.
9 THRM
Thermistor Bias Connection. Supply for thermistor resistor-divider. Connect to the high side of the
thermistor/resistor-divider. THRM connects internally to V
TT
during temperature measurement.
10 V
BATT
Power-Supply and Battery Voltage-Sense Input. Kelvin connect to positive terminal of battery pack. Bypass
with a 0.1FF capacitor to CSP.
— EP Exposed Pad. Connect to CSP.
1
3
4
10
8
7
V BATT
ALRT
REG
V TT
SCL
SDA
MAX17047
2 9 THRM AIN
5 6 CSP CSN
TDFN
TOP VIEW
+
EP