參數(shù)資料
型號(hào)： BQ2060SS
英文描述： Silicon Bridge Rectifiers
中文描述： 集成電路表面貼裝，棉絮電荷監(jiān)視器
文件頁(yè)數(shù)： 9/46頁(yè)
文件大?。?/td> 364K
代理商： BQ2060SS
This means that a 0.39% reduction of RM will be made
12.8 times per day to achieve the desired 5% per day re-
duction at 35
°
C.
Figure 3 illustrates how the self-discharge estimate al-
gorithm adjusts RemainingCapacity() vs. temperature.
Light Discharge or Suspend Current
Compensation
The bq2060 can be configured in two ways to compen-
sate for small discharge currents that produce a signal
below the digital filter. First, the bq2060 can decrement
RM and DCR at a rate determined by the value stored
in
Light Discharge Current
EE 0x2b when it detects no
discharge activity and the SMBC and SMBD lines are
high.
Light Discharge Current
has a range of 44
μ
A to
11.2mA.
Alternatively, the bq2060 can be configured to disable
the digital filter for discharge when the SMBC and
SMBD lines are high. In this way, the digital filter will
not mask the leakage current signal. The bq2060 is con-
figured in this mode by setting the NDF bit in
Control
Mode
.
Midrange Capacity Corrections
The bq2060 applies midrange capacity corrections when
the VCOR bit is set in
Pack Configuration
. The bq2060
adjusts RM to the associated percentage at three differ-
ent voltage levels VOC25, VOC50, and VOC75. The VOC
values represent the open circuit battery voltage at
which RM corresponds to the associated state of charge
foreach threshold.
Threshold
VOC25
VOC50
VOC75
Associated State of Charge
25%
50%
75%
For the midrange corrections to occur, the temperature
must be in the range of 19
°
C to 31
°
C inclusive and the
Current() and AverageCurrent() must both be between
–64mA and 0. The bq2060 makes midrange corrections
as shown in Table 5.
Charge Control
Charging Voltage and Current Broadcasts
The bq2060 supports SBS charge control by broadcasting
the ChargingCurrent() and ChargingVoltage() to the
Smart Charger address. The bq2060 broadcasts the re-
quests every 10s. The bq2060 updates the values used in
the charging current and voltage broadcasts based on the
battery’s state of charge, voltage, and temperature. The
fast-charge rate is programmed in
Fast-Charging Current
EE 0x1a - 0x1b while the charge voltage is programmed in
ChargingVoltage
EE 0x0a-0x0b.
The bq2060 internal charge control is compatible with
popular rechargeable chemistries.
charge-termination techniques include a change in tem-
perature over a change in time (
T/
t) and current
taper, for nickel-based and Li-Ion chemistries, respec-
tively. The bq2060 also provides pre-charge qualifica-
tion and a number of safety charge suspensions based
on current, voltage, temperature, and state ofcharge.
The primary
Alarm Broadcasts to Smart Charger and Host
If any of the bits 8–15 in BatteryStatus() is set, the
bq2060 broadcasts an AlarmWarning() message to the
Host address. If any of the bits 12–15 in BatteryStatus()
are set, the bq2060 also sends an AlarmWarning() mes-
sage to the Smart Charger address. The bq2060 repeats
the AlarmWarning() message every 10s until the bits are
cleared.
Pre-Charge Qualification
The bq2060 sets ChargingCurrent() to the pre-charge
rate as programmed in
Pre-Charge Current
EE
0x1e-0x1funder the followingconditions:
9
Condition
Result
Voltage()
≥
VOC75 and RelativeStateOfCharge()
≤
63%
RelativeStateOfCharge()
→
75%
< VOC75 and RelativeStateOfCharge()
≥
87%
RelativeStateOfCharge()
→
75%
≥
VOC50 and RelativeStateOfCharge()
≤
38%
RelativeStateOfCharge()
→
50%
<VOC50 and RelativeStateOfCharge()
≥
62%
RelativeStateOfCharge()
→
50%
≥
VOC25 and RelativeStateOfCharge()
≤
13%
RelativeStateOfCharge()
→
25%
< VOC25 and RelativeStateOfCharge()
≥
37%
RelativeStateOfCharge()
→
25%
Table 5. Midrange Corrections
bq2060
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