Gauge IC. BQ2013H Datasheet

BQ2013H IC. Datasheet pdf. Equivalent

Part BQ2013H
Description Gas Gauge IC
Feature Not Recommended For New Designs bq2013H Features ➤ Accurate measurement of available charge in re.
Manufacture Benchmarq
Datasheet
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Not Recommended For New Designs bq2013H Features ➤ Accura BQ2013H Datasheet
Recommendation Recommendation Datasheet BQ2013H Datasheet




BQ2013H
Not Recommended For New Designs
bq2013H
Features
Accurate measurement of available
charge in rechargeable batteries
Designed for electric assist bicycles
and other applications
Measures a wide dynamic current
range
Supports NiCd, NiMH or lead acid
Designed for battery pack inte-
gration
- 120µA typical standby current
(self-discharge estimation mode)
- Small size enables imple-
mentations
in
as
little
as
1
2
square inch of PCB
Direct drive of LEDs for capacity
display
Automatic charge and self-
discharge compensation using in-
ternal temperature sensor
Simple single-wire serial commu-
nications port for subassembly
testing
16-pin narrow SOIC
Gas Gauge IC for Power-
Assist Applications
General Description
The bq2013H Gas Gauge IC is in-
tended for battery-pack installation to
maintain an accurate record of a bat-
tery’s available charge. The IC moni-
tors a voltage drop across a sense resis-
tor connected in series between the
negative battery terminal and ground
to determine charge and discharge ac-
tivity of the battery. The bq2013H is
designed for high cpaacity battery
packs used in high-discharge rate sys-
tems.
Battery self-discharge is estimated
based on an internal timer and tem-
perature sensor. Compensations for
battery temperature, rate of charge,
and self-discharge are applied to the
charge counter to provide available
capacity information across a wide
range of operating conditions. Initial
battery capacity, self-discharge rate,
display mode, and charge compensa-
tion are set using the PROG1-6 pins.
Actual battery capacity is automati-
cally “learned” in the course of a dis-
charge cycle from full to empty.
Nominal available charge may be
directly indicated using a five-seg-
ment LED display. These segments
are used to graphically indicate
nominal available charge.
The bq2013H supports a simple
single-line bi-directional serial link to
an external processor (common
ground). The bq2013H outputs bat-
tery information in response to exter-
nal commands over the serial link. To
support battery pack testing, the
outputs may also be controlled by
command. The external processor
may also overwrite some of the
bq2013H gas gauge data registers.
The bq2013H may operate directly
from four nickel cells or three lead
acid. With the REF output and an
external transistor, a simple, inexpen-
sive regulator can be built to provide
VCC from a greater number of cells.
Internal registers include available
charge, temperature, capacity, battery
ID, and battery status.
Pin Connections
Pin Names
LCOM
SEG1/PROG1
SEG2/PROG2
SEG3/PROG3
SEG4/PROG4
SEG5PROG5
PROG6
VSS
1
2
3
4
5
6
7
8
16 VCC
15 REF
14 DONE
13 HDQ
12 RBI
11 SB
10 DISP
9 SR
16-Pin Narrow SOIC
PN2013.eps
SLUS120B–MAY 1999 - REVISED - JANUARY 2014
LCOM
LED common output
REF
SEG1/PROG1 LED segment 1/ Program DONE
1 input
SEG2/PROG2 LED segment 2 / Program HDQ
2 input
SEG3/PROG3 LED segment 3/ Program
3 input
SEG4/PROG4 LED segment 4/ Program
4 input
RBI
SB
DISP
SEG5/PROG5 LED segment 5/ Program
5 input
PROG6
Program 6 input
SR
VCC
1
Voltage reference output
Fast charge complete
input
Serial communications
input/output
Register backup input
Battery sense input
Display control input
Sense resistor input
Supply voltage



BQ2013H
Not Recommended For New Designs
bq2013H
Pin Descriptions
LCOM LED common
This open-drain output switches VCC to source
current for the LEDs. The switch is off during
initialization to allow reading of PROG1-5
pull-up or pull-down program resistors. LCOM
is also high impedance when the display is off.
SEG1
SEG5
LED display segment outputs (dual func-
tion with PROG1–PROG5
Each output may activate an LED to sink
the current sourced from LCOM.
PROG1
PROG6
Programmed full count selection inputs
(dual function with SEG1 - SEG5)
These three-level input pins define the pro-
grammed full-count (PFC), display mode,
self-discharge rate, offset compensation,
overload threshold, and charge compensa-
tion.
SR Sense resistor input
DONE
The voltage drop (VSR) across the sense re-
sistor RS is monitored and integrated over
time to interpret charge and discharge activ-
ity. The SR input (see Figure 1) is connected
between the negative terminal of the battery
and ground. VSR > VSS indicates charge, and
VSR < VSS indicates discharge. The effective
voltage drop, VSRO, as seen by the bq2013H
is VSR + VOS.
Charge complete input
This input/output is used to communicate
the status of an external charge controller to
the bq2013H.
DISP
SB
RBI
HDQ
REF
VCC
VSS
Display control input
DISP pulled high disables the display.
DISP floating allows the LED display to
be active during certain charge and dis-
charge conditions. Transitioning DISP
low activates the display.
Secondary battery input
This input monitors the scaled battery volt-
age through a high-impedance resistive di-
vider network for the end-of-discharge volt-
age (EDV) thresholds.
Register backup input
This input is used to provide backup poten-
tial to the bq2013H registers during periods
when VCC < 3V. A storage capacitor can be
connected to RBI.
Serial I/O pin
This is an open-drain bidirectional commu-
nications port.
Voltage reference output for regulator
REF provides a voltage reference output for
an optional micro-regulator.
Supply voltage input
Ground
2





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