rohm referencedesigns
refsens002
refsens002reference design / application evaluation kit | rohm co., ltd.-凯发k8一触即发
100a分流电阻和运放电流检测电路 参考设计
在汽车和工业设备领域，低边电流检测电路用于电流（电压）控制、过流限制和剩余电池电量检测等功能。通过分流电阻和电流检测放大器来实现的低边电流检测电路是非常常见的。refsens002 是分流电阻器和电流检测放大器的电流传感器参考设计。同时rohm还提供设计数据和参考板的销售以方便客户进行参考设计，助力客户减少设计工时。今后将计划发布电流检测范围高达50a的高精度参考设计板。
- the simplest current sense circuit with shunt resistor and operational amplifier (lmr1802g)
- high power shunt resistor psr400 2mω 4 in parallel
- current sense range: up to 100a
- thermally designed to keep each component within its absolute maximum rating even
- at a detected current iin = 100a and an ambient temperature ta = 85°c
design resources
- refsens002-evk-001
specifications
| board number | input voltage (equipped device) | input voltage (sensing line) | output system | current sense range | size | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| refsens002-evk-001 | 2.7 to 5.5v (lmr1802g-lb) | ～26v (terminal protection by zener diode) | analog voltage value | up to 100a | 90mm x 80mm |
distribution inventory
| board number | distributor | quantity available |
|---|
key components
| board number | part number | product category | datasheet | status | spice | ltspice® ? | thermal model | symbol & footprint | 3d step | samacsys ecad library | calc tool | rohm solution simulator |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| refsens002-evk-001 | bh1749nuc | color sensor ics | last time buy | - | ||||||||
| refsens002-evk-001 | lmr1802g-lb | operational amplifiers | recommended | solution simulator | ||||||||
| refsens002-evk-001 | lmr1802yg-c | operational amplifiers | recommended | solution simulator | ||||||||
| refsens002-evk-001 | psr400itqfj2l00 | current detection resistors | recommended | solution simulator | ||||||||
| refsens002-evk-001 | tdzv5.1 | zener diodes | recommended | - |