参数资料
| 型号： | SC810ULTRT |
| 厂商： | Semtech |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MANAGEMENT |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | SC810ULDKR |
SC810
Applications Information (continued)
Figures 2a and 2b show low and high resistance ranges,
respectively.
Termination
When the battery voltage reaches V CV , the SC810 transi-
tions from constant current regulation to constant voltage
regulation. While V BAT is regulated to V CV , the current into
the battery decreases as the battery becomes fully
charged. When the output current drops below the termi-
nation threshold current, fixed at 10% of the programmed
fast-charge current, charging terminates. Upon termina-
tion, the STATB pin open drain output turns off and the
charger either enters monitor state or float-charges the
battery, depending on the logical state of the ENB input
pin.
Charger output current is the sum of the battery charge
current and the system load current. Battery charge
current changes gradually, and establishes a slowly dimin-
ishing lower bound on the output current while charging
in CV mode. The load current into a typical digital system
is highly transient in nature. Charge cycle termination is
detected when the sum of the battery charging current
and the greatest load current occurring within the imme-
diate 300μs to 550μs past interval is less than the pro-
grammed termination current. This timing behavior
permits charge cycle termination to occur during a brief
low-load-current interval, and does not require that the
longer interval average load current be small.
115
110
105
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
Termination threshold current accuracy is dominated by
offset error. The range of expected termination current
versus programming resistance is shown in Figures 3a
and 3b. The figures show the nominal termination current
versus nominal R IPRGM resistance as the center plot and
two theoretical limit plots indicating maximum and
minimum current versus nominal programming resis-
tance. These plots are derived from models of the
expected worst-case contribution of error sources
depending on programmed current. The current range
includes the uncertainty due to a 1% tolerance resistor.
The dots on each plot indicate the currents obtained with
the EIA E96 standard value 1% tolerance resistors. Figures
3a and 3b show low and high resistance ranges,
respectively.
Enable Input
The ENB pin is a tri-level logical input that allows selec-
tion of the following behaviors:
charging enabled with float-charging
after termination (ENB = low range)
charging enabled with float-charging dis-
abled and battery monitoring at termina-
tion (ENB = mid range)
charging disabled (ENB = high range).
The ENB pin is designed to interface to a processor GPIO
port powered from a peripheral supply voltage as low as
35
30
25
20
15
10
5
20
2
2.5
3
3.5
4 4.5 5
R IPRGM (k Ω ), R-tol = 1%
5.5
6
6.5
7
0
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
R IPRGM (k Ω ), R-tol = 1%
Figure 3a — Termination Current Tolerance versus
Programming Resistance, Low Resistance Range
Figure 3b — Termination Current Tolerance versus
Programming Resistance, High Resistance Range
12
相关PDF资料 |
PDF描述 |
|---|---|
| SC811ULTRT | IC BATTERY MANAGEMENT |
| SC824ULTRT | IC BATTERY MANAGEMENT |
| SC900841JVKR2 | IC POWER MGT 338-MAPBGA |
| SC900AMLTRT | IC REG LDO ADJ .2A/.15A 20-MLPQ |
| SCCSP900842R2 | IC POWER MGT 36-WLCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC811 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Adapter/USB Tri-Mode Single-cell Li-ion Charger |
| SC8-11 | 制造商:WM BERG 功能描述: |
| SC811EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Adapter/USB Tri-Mode Single-cell Li-ion Charger |
| SC811I-260B | 制造商:Supermicro Computer Inc 功能描述:CHASSIS;1U;260W;UP P4;2XFIXED |
| SC811ULTRT | 功能描述:IC BATTERY MANAGEMENT RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
发布紧急采购，3分钟左右您将得到回复。