LTC4150

5

4150fc

PIN FUNCTIONS

and charger side of the sense resistor. Full-scale current

Negative Sense Input. This is the inverting

tery terminal side of the sense resistor. Full-scale current

for proper operation.

noise and fast battery current variations. A 4.7μF value

noise and fast battery current variations. A 4.7μF value

SHDN(Pin5):ShutdownDigitalInput.Whenassertedlow,

SHDNforcestheLTC4150intoitslowcurrentconsumption

power-down mode and resets the part. In applications

used between SHDN and the logic which drives it. See the

Applications Information section.

POL (Pin 6): Battery Current Polarity Open-Drain Output.

POL indicates the most recent battery current polarity when

INT is high. A low state indicates the current is flowing out

of the battery while high impedance means the current

is going into the battery. POL latches its state when INT

is asserted low. POL is an open-drain output and can be

pulled up to any logic supply up to 9V. In shutdown, POL

is high impedance.

GND (Pin 7): Ground. Connect directly to the negative

battery terminal.

CLR (Pin 9): Clear Interrupt Digital Input. When asserted

low for more than 20μs, CLR resets INT high. Charge

counting is unaffected. INT may be directly connected to

CLR. In this case the LTC4150 will capture each assertion

of INT and wait at least 1μs before resetting it. This ensures

that INT pulses low for at least 1μs but gives automatic

a resistive divider must be used between INT and CLR.

See the Applications Information section.

INT (Pin 10): Charge Count Interrupt Open-Drain Output.

reset by a low pulse at CLR. INT is an open-drain output

and can be pulled up to any logic supply of up to 9V. In

shutdown INT is high impedance.