LTC2941-1C View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC2941-1C

1A I2C Battery Gas Gauge with Internal Sense Resistor

Linear Technology 

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LTC2941-1

Pin Functions

SENSE+ (Pin 1): Positive Current Sense Input and Power

Supply. Connect to the load and battery charger output.

VSENSE+ operating range is 2.7V to 5.5V.

GND (Pin 2): Device Ground. Connect directly to the nega-

tive battery terminal.

SCL (Pin 3): Serial Bus Clock Input.

SDA (Pin 4): Serial Bus Data Input and Output.

AL/CC (Pin 5): Alert Output or Charge Complete Input.

Configured either as an SMBus alert output or charge

complete input by control register bits B[2:1]. At power-up,

the pin defaults to alert mode conforming to the SMBus

alert response protocol. It behaves as an open-drain logic

output that pulls to GND when a value in the threshold

registers is exceeded.

When configured as a charge complete input, a high level

at CC sets the value of the accumulated charge (registers

C, D) to FFFFh. Coulomb counting starts when the input

returns to low level.

SENSE– (Pin 6): Negative Current Sense Input. Connect

SENSE– to the positive battery terminal. Current from/into

this pin must not exceed 1A in normal operation.

Exposed Pad (Pin 7): Do Not Connect. Soldering the

exposed pad to adequate electrically isolated copper area

is recommended for best thermal performance.

29411f



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