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BQ2016 Datasheet

  • BQ2016

  • GAS GAUGE IC FOR HIGH DISCHARGE RATES

  • 290.03KB

  • 21頁(yè)

  • TI

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bq2016
GAS GAUGE IC FOR
HIGH DISCHARGE RATES
SLUS475A 鈥?JANUARY 2001 鈥?REVISED NOVEMBER 2002
D
Provides Accurate Measurement of
D
D
D
D
D
D
D
Available Capacity in Nicd or NiMH
Batteries
Measures a Wide Dynamic-Current Range
Requires
鈮?/div>
1 Square Inch of PCB Space for
Easy Pack Integration
Measures Charge Flow Using a Low-Offset
V-to-F Converter
Automatically Compensates Measurements
for Rate and Temperature
Supports 5 LEDs for Remaining Capacity
Indication
Provides a 1-Wire HDQ Communication
Interface
Packaging: 28-Pin SSOP
TSSOP PACKAGE
(TOP VIEW)
HDQ
NC
NC
RBI
REG
NC
V
CC
V
SS
DISP
LED1
LED2
LED3
LED4
LED5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
NC
NC
SB
PROG
VPFC
NC
SR1
SR2
SRC
TS
THON
CVON
NC
NC
description
NC 鈥?Do not connect
The bq2016 gas gauge IC for battery pack or in-system installation maintains an accurate record of available
battery capacity. To integrate charge and discharge activity of the battery, the IC monitors a voltage drop across
a sense resistor connected in series with the cells of the battery. The bq2016 compensates for battery
temperature, charge/discharge rate, and battery self-discharge to the charge counter to provide available-
capacity information across a wide range of operating conditions. The bq2016 works with NiCd or NiMH battery
packs that have a capacity of 1 to 4.5 Ah and that are designed for high discharge rate applications such as
power tools.
The VPFC input sets the initial full charge reference of the battery pack. The bq2016 learns the true discharge
capacity of the battery pack and automatically updates the full-charge reference during the course of a
discharge cycle from full to empty. The remaining capacity is reported as the ratio between the actual discharge
capacity and the full-charge capacity. The bq2016 communicates available capacity using 5 LEDs or the 1-wire
communications port.
The 1-wire serial communication port (5Kb/s) allows an external processor to read and write the internal
registers of the bq2016. Communication with the bq2016 is useful for pack testing or host processing of the
available battery information. The internal registers include available battery capacity, voltage, temperature,
current, and battery status. The RBI input maintains the register set in the event of pack voltage collapse due
to a high discharge pulse.
The bq2016 circuit can operate from the cells in the pack. The REG output and an external FET provide a simple,
inexpensive voltage regulator to supply power to the circuit from the cells
OPTIONS
TJ
鈥?0擄C to 70擄C
28-PIN SSOP PACKAGE
bq2016DBQ
bq2016DBQR
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
錚?/div>
2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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