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BQ2014SN-D120TR Datasheet

  • BQ2014SN-D120TR

  • Gas Gauge IC with External Charge Control

  • 233.59KB

  • 22页

  • TI

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bq2014
The CI values are:
FLGS1 Bits
7
-
6
-
5
-
4
CI
3
-
2
-
1
-
0
-
Where EDV1 is:
0
1
Valid charge action detected,V
SB
鈮?/div>
V
TS
V
SB
< V
TS
providing that OVLD=0 (see
FLGS2 register description)
Where CI is:
0
1
When LMD is updated with a valid full dis-
charge
After the 64th valid charge action with no
LMD updates or when the device is reset
The
valid discharge
flag (VDQ) is asserted when the
bq2014 is discharged from NAC = LMD or DONE is
valid. The flag remains set until either LMD is updated
or one of three actions that can clear VDQ occurs:
n
The
final end-of-discharge warning
flag (EDVF) flag
is used to warn that battery power is at a failure condi-
tion. All segment drivers are turned off. The EDVF flag
is latched until a valid charge has been detected. The
EMPTY pin is also forced to a high-impedance state on
assertion of EDVF. The host system may pull EMPTY
high, which may be used to disable circuitry to prevent
deep-discharge of the battery. The EDVF threshold is
set 100mV below the EDV1 threshold.
The EDVF values are:
FLGS1 Bits
7
-
6
-
5
-
4
-
3
-
2
-
1
-
0
EDVF
The self-discharge count register (SDCR) has
exceeded the maximum acceptable value (4096
counts) for an LMD update.
A valid charge action sustained at V
SRO
> V
SRQ
for at
least 256 NAC counts.
The EDV flag was set at a temperature below 0掳C
n
Where EDVF is:
0
1
Valid charge action detected,
V
SB
鈮?/div>
V
TS
- 100mV
V
SB
< V
TS
- 100mV providing that OVLD=0
(see FLGS2 register description)
n
The VDQ values are:
FLGS1 Bits
7
-
6
-
5
-
4
-
3
VDQ
2
-
1
-
0
-
Voltage Threshold Register (VTS)
The end-of-discharge threshold voltages (EDV1 and
EDVF) can be set using the VTS register (address=0ch).
The read/write VTS register sets the EDV1 trip point.
EDVF is set 100mV below EDV1. The default value in
the VTS register is 70h, representing EDV1 = 1.05V and
EDVF = 0.95V. EDV1 = 2.4V
鈭?/div>
(VTS/256).
VTS Register Bits
7
6
5
4
3
2
1
0
VTS7 VTS6 VTS5 VTS4 VTS3 VTS2 VTS1 VTS0
Where VDQ is:
0
SDCR
鈮?/div>
4096, subsequent valid charge ac-
tion detected, or EDV1 is asserted with the
temperature less than 0掳C
On first discharge after NAC = LMD or
DONE is valid
1
The
first end-of-discharge warning
flag (EDV1)
warns the user that the battery is almost empty. The
first segment pin, SEG
1
, is modulated at a 4Hz rate if
the display is enabled once EDV1 is asserted, which
should warn the user that loss of battery power is immi-
nent. The EDV1 flag is latched until a valid charge has
been detected. The EDV1 threshold is externally con-
trolled via the VTS register (see Voltage Threshold Reg-
ister on this page).
The EDV1 values are:
FLGS1 Bits
7
-
6
-
5
-
4
-
3
-
2
-
1
EDV1
0
-
Battery Voltage Register (VSB)
The read-only battery voltage register is used to read
the single-cell battery voltage on the SB pin. The VSB
register is updated approximately once per second with
the present value of the battery voltage.
V
SB
= 2.4V
鈭?/div>
(VSB/256)
VSB Register Bits
7
6
5
4
3
2
1
0
VSB7 VSB6 VSB5 VSB4 VSB3 VSB2 VSB1 VSB0
12

BQ2014SN-D120TR 产品属性

  • 2,500

  • 集成电路 (IC)

  • PMIC - 电池管理

  • -

  • 燃料，电量检测计/监控器

  • 镍镉（NiCd）、镍金属氢化物（NiMH）

  • 3 V ~ 6.5 V

  • 0°C ~ 70°C

  • 表面贴装

  • 16-SOIC（0.154"，3.90mm 宽）

  • 16-SOIC N

  • 带卷 (TR)

  • 296-9509-ND - EVAL MOD BQ20XX GAS GAUGE IC'S

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