参数资料
型号: LTC6802IG-1#TRPBF
厂商: Linear Technology
文件页数: 33/38页
文件大小: 0K
描述: IC MONITOR BATT STACK MC 44-SSOP
标准包装: 2,000
功能: 电池监控器
电池化学: 锂离子(Li-Ion)
电源电压: 4 V ~ 50 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)
LTC6802-1
APPLICATIONS INFORMATION
PROVIDING HIGH-SPEED OPTO-ISOLATION
OF THE SPI DATA-PORT
Isolation techniques that are capable of supporting the
1Mbps data rate of the LTC6802-1 require more power
on the isolated (battery) side than can be furnished by
the V REG output of the LTC6802-1. To keep battery drain
minimal, this means that a DC/DC function must be imple-
mented along with a suitable data isolation circuit, such as
shown in Figure 19. Here an optimal Avago 4-channel (3/1
bidirectional) opto-coupler is used, with a simple isolated
supply generated by an LTC1693-2 configured as a 200kHz
oscillator. The DC/DC function provides an unregulated
logic voltage (~4V) to the opto-coupler isolated side,
from energy provided by host-furnished 5V. This circuit
provides totally galvanic isolation between the batteries
and the host processor, with an insulation rating of 560V
continuous, 2500V transient.
330Ω
100k
+5V_HOST
3.57k
3.57k
3.57k
CSBI
100k
CSBI
SDI
SDO
TP0610K
100k
SDI
SCKI
330Ω
TP0610K
330Ω
TP0610K
SCKI
V REG
249Ω
100nF
4.99k
SDO
LTC6802-1
GND_HOST
ACSL-6410
ISOLATED V LOGIC
1μF
470pF
20k
BAT54S
BAT54S
V CC1
IN1
1μF
6 ?
4
? 1
3
33nF
OUT1 GND1
V CC2 IN2
OUT2 GND2
10k
V ?
PE68386
LTC1693-2
68021 F19
Figure 19. Providing an Isolated High-Speed Data Interface
68021fa
33
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