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參數(shù)資料
| 型號(hào)： | bq2050 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Lithium Ion Power Gauge IC(鋰離子電源Gause 芯片) |
| 中文描述： | 鋰離子動(dòng)力計(jì)IC（鋰離子電源高斯芯片） |
| 文件頁數(shù)： | 2/21頁 |
| 文件大?。?/td> | 235K |
| 代理商： | BQ2050 |
Pin Descriptions
LCOM
LEDcommonoutput
Open-drain output switches V
CC
to source
current for the LEDs. The switch is off dur-
ing initialization to allow reading of the soft
pull-up
or
pull-down
LCOM is also high impedance when the dis-
play is off.
program
resistors.
SEG
1
–
SEG
5
LED display segment outputs (dual func-
tion with PROG
1
–PROG
6
)
Each output may activate an LED to sink
the current sourced from LCOM.
PROG
1
–
PROG
2
Programmed full count selection inputs
(dual function with SEG
1
–SEG
2
)
These three-level input pins define the pro-
grammed full count (PFC) thresholds de-
scribed in Table 2.
PROG
3
–
PROG
4
Power gauge rate selection inputs (dual
function with SEG
3
–SEG
4
)
These three-level input pins define the scale
factor described in Table 2.
PROG
5
Self-discharge rate selection (dual func-
tion with SEG
5
)
This
selfdischarge and battery compensation fac-
tors as shown in Table 1.
three-level
input
pin
defines
the
PROG
6
Capacity initialization selection
This three-level pin defines the battery state
of charge at reset as shown in Table 1.
N/C
No connect
SR
Sense resistor input
The voltage drop (V
SR
) across the sense re-
sistor R
S
is monitored and integrated over
time to interpret charge and discharge activ-
ity. The SR input is tied between the nega-
tive terminal of the battery and the sense re-
sistor. V
SR
< V
SS
indicates discharge, and V
SR
> V
SS
indicates charge. The effective voltage
drop, V
SRO
, as seen by the bq2050 is V
SR
+
V
OS
.
DISP
Display control input
DISP high disables the LED display. DISP
tied to V
CC
allows PROG
X
to connect directly
to V
CC
or V
SS
instead of through a pull-up or
pull-down resistor. DISP floating allows the
LED display to be active during charge.
DISP low activates the display. See Table 1.
SB
Secondary battery input
This input monitors the battery cell voltage
potential through a high-impedance resis-
tive divider network for end-of-discharge
voltage (EDV) thresholds, and battery re-
moved.
RBI
Register backup input
This pin is used to provide backup potential to
the bq2050 registers during periods when
V
CC
≤
3V. A storage capacitor or a battery
can be connected to RBI.
DQ
Serial I/O pin
This is an open-drain bidirectional pin.
REF
Voltage reference output for regulator
REF provides a voltage reference output for
an optional micro-regulator.
V
CC
Supply voltage input
V
SS
Ground
2
bq2050
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| BQ2050H | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Cost Lithium Ion Power Gauge IC |
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| BQ2050HSN-A308 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Cost Lithium Ion Power Gauge IC |
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