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| 型号： | LTC6803IG-3#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 34/40页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR BATT STACK 44-SSOP |
| 标准包装： | 2,000 |
| 功能： | 电池监控器，过压/欠压保护 |
| 电池化学： | 多化学成分，超级电容器 |
| 电源电压： | 4 V ~ 55 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-FSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 44-SSOP |
| 包装： | 带卷 (TR) |
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LTC6803-1/LTC6803-3
APPLICATIONS INFORMATION
the resistive loading on the cell group when the IC enters
standby mode (i.e., when WDTB goes low). An LT6004
micropower operational amplifier section is shown for
buffering the divider signal to preserve accuracy. This
circuit has the virtue that it can be converted about four
times more frequently than the entire battery array, thus
offering a higher sample rate option at the expense of
some precision/accuracy, reserving the high resolution
cell readings for calibration and balancing data.
PROVIDING HIGH SPEED ISOLATION OF THE SPI DATA
PORT
Isolation techniques that are capable of supporting the
1Mbps data rate of the LTC6803 require more power on
the isolated (battery) side than can be furnished by the
V REG output of the LTC6803. To keep battery drain minimal,
this means that a DC/DC function must be implemented
along with a suitable data isolation circuit, such as shown
in Figure 22. A quad (3 + 1) data isolator Si8441AB-C-IS
is used to provide non-galvanic SPI signal connections
between a host microprocessor and an LTC6803. An
inexpensive isolated DC/DC converter provides power-
ing of the isolator function completely from the host 5V
power supply. A quad three-state buffer is used to allow
SPI inputs at the LTC6803 to rise to logic high level when
the isolator circuitry powers down, assuring the lowest
power consumption in the standby condition. The pull-
ups to V REG are selected to match the internal loading on
V REG by ICs operating with a current mode SPI interface,
thus balancing the current in all cells during operation.
The additional pull-up on the SDO line (1k resistor and
Schottky diode) is to improve rise time, in lower data-rate
applications this may not be needed.
SUPPLY DECOUPLING IF BATTERY-STACK POWERED
As shown in Figure 23, the LTC6803-3 can have filtering
on both V + and V – , so differential bypassing to the cell
group potentials is recommended. The Zener suppresses
overvoltages from reaching the IC supply pins. A small
ferrite-bead inductor provides protection for the Zener, par-
ticularly from energetic ESD strikes. Since the LTC6803-1
cannot have a series resistance to V – , additional Schottky
diodes are needed to prevent ESD-induced reverse-supply
(substrate) currents to flow.
6
5
5V_HOST
SPI_CLOCK
SPI_CHIPSELECT
SPI_MASTEROUT
SPI_MASTERIN
GND_HOST
100
100
100
100
1μF
1μF
1
2
3
4
5
6
7
8
Si8441AB-C-IS
QUAD ISOLATOR
V DD1 V DD2
GND1 GND2
A1 B1
A2 B2
A3 B3
A4 B4
EN1 EN2
GND1 GND2
16
15
14
13
12
11
10
9
13
12
1μF
11
1/4 74ABT126
CMDSH2-3
1
2 3
4
1/4 74ABT126
1/4 74ABT126
1k
10
8
9
4.22k
4.22k
4.22k
4.22k
V REG
SCKI
CSB1
SCI
SDO
470pF
20.0k
1
2
3
4
LTC1693-2
IN1 V CC1
GND1 OUT1
IN2 V CC2
GND2 OUT2
8
7
6
5
33nF
PE-68386
1 ? ? 6
3 4
BAT54S
1/4 74ABT126
74ABT126 SUPPLY SHARED WITH
ISOLATOR V DD2 and GND2
680313 F22
V –
10.0k
Figure 22. Providing an Isolated High Speed Data Interface
680313fa
34
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6803IG-4#PBF | 功能描述:IC MONITOR BATT STACK MC 44-SSOP 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 |
| LTC6803IG-4#TRPBF | 功能描述:IC MONITOR BATT STACK 44-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC6803IG-4PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Multicell Battery Stack Monitor |
| LTC6804-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Effciency Bidirectional Multicell Battery Balancer |
| LTC6804-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Effciency Bidirectional Multicell Battery Balancer |
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