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参数资料
| 型号： | LTC4151CS-2#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SOP-16 |
| 文件页数： | 2/18页 |
| 文件大小： | 476K |
| 代理商： | LTC4151CS-2#PBF |
LTC4151
10
4151fc
Using Opto-Isolators with LTC4151-1 and LTC4151-2
The LTC4151-1/LTC4151-2 split the SDA line into SDAI
(input) and SDAO (LTC4151-1 inverted output) or SDAO
(LTC4151-2output)forconvenienceofopto-couplingwith
a host controller that sits at a different ground level.
When using opto-isolators with the LTC4151-1, connect
the SDAI to the output of the incoming opto-coupler and
connect the SDAO to the anode of the outgoing opto-
coupler (see Figure 9). With the outgoing opto-coupler
clamping SDAO and internal 6V (5.5V minimum) clamps
on SDAI and SCL, the pull-up resistors on these three pins
can be directly connected to VIN. In this way (with SDAO
rather than conventional SDAO), the need for a separate
low voltage supply for pull-ups is eliminated.
Figure 11 shows the LTC4151-2 with high speed opto-
couplers for faster bus speeds. The LTC4151-2 has a non-
inverter SDAO output. Powered from VIN, the high voltage
LT3010-5lowdropoutregulatorprovidesthesupplyforthe
opto-couplers as well as the bus lines pull-up. If the SDAI
and SDAO on the master controller are not tied together,
the ACK bit of the SDAO must be returned back to SDAI.
Start and Stop Conditions
When the I2C bus is idle, both SCL and SDA must remain
in the high state. A bus master signals the beginning of a
transmission with a Start condition by transitioning SDA
from high to low while SCL stays high. When the master
has finished communicating with the slave, it issues a
Stop condition by transitioning SDA from low to high
while SCL stays high. The bus is then free for another
transmission.
Stuck-Bus Reset
TheLTC4151I2Cinterfacefeaturesastuck-busresettimer.
The low conditions of the SCL and the SDA/SDAI pins
are OR’ed to start the timer. The timer is reset when both
SCL and SDA/SDAI are pulled high. If the SCL pin or the
SDA/SDAI pin is held low for over 33ms, the stuck-bus
timer will expire and the internal I2C state machine will be
reset to allow normal communication after the stuck-bus
condition is cleared. The stuck-bus timer can be disabled
by clearing control register bit G2.
APPLICATIONS INFORMATION
Figure 9. Opto-Isolation of the I2C Interface Between LTC4151-1 and a
Microcontroller (Data Rate of I2C is Limited by Slew Rate of Opto-Isolators)
4151 F09
3.3V
RS
0.02
-CONTROLLER
LTC4151-1
SCL
VIN
48V
VIN
VDD
VADIN
SDAI
ADIN
ADR1
R5
0.51k
R6
10k
R7
10k
R4
0.51k
R1
20k
R2
20k
R3
5.1k
1
8
2
7
3
6
4
5
8
1
7
2
6
3
5
4
SDA
ADR0
GND
SENSE+ SENSE–
SDA0
MOCD207M
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相关代理商/技术参数 |
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| LTC4151HDD#PBF | 功能描述:IC PWR MONITOR MS 80V SD 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LTC4151HDD#TRPBF | 功能描述:IC PWR MONITOR MS 80V SD 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LTC4151HMS#PBF | 功能描述:IC PWR MONITOR MS 80V SD 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LTC4151HMS#TRPBF | 功能描述:IC PWR MONITOR MS 80V SD 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LTC4151IDD#PBF | 功能描述:IC CURRENT MONITOR(12BIT) 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
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