BQ2016 Datasheet, PDF (2/21 Pages) Texas Instruments – GAS GAUGE IC FOR HIGH DISCHARGE RATES

bq2016
GAS GAUGE IC FOR
HIGH DISCHARGE RATES
SLUS475A– JANUARY 2001 – REVISED NOVEMBER 2002
Terminal Functions
TERMINAL
NAME
I/O
NO.
DESCRIPTION
HDQ
1
I/O Serial communication input/output. Open-drain bidirectional communications port.
RBI
4
I Register backup input provides backup potential to the bq2016 registers during periods of low operating
voltage. RBI accepts a storage capacitor or a battery input.
REG
5
O Regulator output provides a reference to control an n-JFET for VCC regulation to the bq2016 from the
battery potential.
VCC
VSS
LED1–LED5
7
8
10–14
I Supply voltage input
Ground
O LED display segment outputs that each may drive an external LED.
CVON
17
O Cell voltage divider control. Output to connect the voltage divider on the voltage input during
measurement.
VPFC
24
I Program capacity input. 16-level input to program the initial battery full-charge reference.
SB
26
I Battery voltage input. Input connection to monitor battery–pack voltage.
SR2–SR1
21,22
I Sense resistor inputs. Input connections for a small value sense resistor to monitor the battery charge and
discharge current flow.
SRC
20
I Current sense voltage input to monitor instantaneous current.
DISP
9
I Display activation input that activates the LED drivers LED1–LED5.
TS
19
I Temperature sense input connects to an external thermistor or should be grounded when using the internal
thermistor. The function depends on the state of the PROG input.
PROG
25
I Program input defines the temperature measurement thermistor (internal or external).
THON
18
O Thermistor bias control output to control a switch in series with an optional external thermistor.
NC
2, 3, 6, 15,
Do not connect. For proper device operation, these pins should not be connected.
16, 23, 27,
28
2
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