LTC2941-1
5
29411f
pin FuncTions
SENSE
+
(Pin 1): Positive Current Sense Input and Power
Supply. Connect to the load and battery charger output.
V
SENSE
+
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.
