Hall transducer in SO-8 package for isolated current measurement
7 March 2007
Power Electronics / Power Management
Minisens is a miniature, integrated circuit transducer for AC and DC isolated current measurement up to 100 kHz. This device from LEM offers full isolation (no optocouplers required) and high sensitivity (from 20 mV to 200 mV per amp of primary current) with no insertion losses. It is mounted directly onto a PCB as an SMD device (SO8-IC package), reducing manufacturing cost.
Minisens integrates, within one mixed signal ASIC, Hall-effect sensors with a magnetic concentrator to allow DC measurement without the need for an additional magnetic core. The non-contact measurement enables an almost unlimited current level as it eliminates the need for current to flow through the device. The only limiting factor is the thermal capacities of the primary conductor. The current can be carried either by a track (or tracks) located on a PCB underneath the Minisens, or by a cable or busbar under or above the IC. It can measure current up to 70 A or even higher.
Many parameters of the ASIC can be configured by on-chip non-volatile memory: adjustment of the transducer's gain, offset, polarity, temperature drift and gain algorithm (proportional to, or independent of VDD). Two outputs are available: one filtered, to limit the noise bandwidth; and one unfiltered, which has a response time of less than 3 μs. The Minisens operates from a single 5 V supply.
The degree of electrical isolation and output sensitivity can be increased by the PCB design - for example, a primary track on the opposite side of the IC gives best isolation; a track on the same side gives the highest sensitivity.
This current transducer opens up opportunities for applications such as white goods or airconditioning to benefit from isolated current measurement. Minisens will also enable enhanced motor control to produce energy savings where other methods such as a shunt have traditionally been used.
Further reading:
Wine farm turns to solar installation for power
Current Automation
Power Electronics / Power Management
Slanghoek Wine farm opted into a power purchase agreement to lower overall electricity costs and enter a true sustainable future, with a price-competitive edge on lower running costs.
Read more...
Industrial PSU family
Brabek
Power Electronics / Power Management
The RACPRO1 family of PSUs supports a universal DC input voltage range from 430 to 850 V DC, allowing the parts to support renewable energy and microgrid applications.
Read more...
Integrated POL voltage regulators
EBV Electrolink
Power Electronics / Power Management
Infineon’s TDA38807 and TDA38806 are their highest density high-efficiency integrated point-of-load (IPOL) solutions for smart enterprise systems.
Read more...
Hi-Rel quarter-brick converters
Accutronics
Power Electronics / Power Management
Gaia Converter’s quarter-brick series DC-DC power modules provides output power levels ranging from 75 to 250 W in fixed output voltages.
Read more...
1700 V GaN Switcher IC
Future Electronics
Power Electronics / Power Management
Power Integrations has introduced a new member of its InnoMux-2 family of single-stage regulated multi-output offline power supply ICs, the industry’s first 1700 V gallium nitride switch.
Read more...
How ADI battery management solutions empower safer, smarter robots
Altron Arrow
Editor's Choice Power Electronics / Power Management
Choosing an appropriate battery pack and its accompanying battery management system is a critical decision in designing an autonomous mobile robot.
Read more...
Industrial power supply range
RFiber Solutions
Power Electronics / Power Management
SynQor’s ruggedised AC-DC and DC-DC converters and filters are designed for a wide range of industrial applications, including those required to withstand harsh environments.
Read more...
PSUs for industrial applications
Power Electronics / Power Management
RECOM’s REDIIN120/240/480 series of AC-DC converters perfectly corresponds with customer needs by exhibiting high efficiency and low energy consumption at no load.
Read more...
Highest density automotive-grade power modules
Altron Arrow
Power Electronics / Power Management
Vicor has released three automotive-grade power modules for 48 V EV systems, which deliver industry-leading power density.
Read more...
MOSFET for automotive applications
Altron Arrow
Power Electronics / Power Management
Infineon’s OptiMOS 7 100 V is offered in the company’s versatile and robust, high-current SSO8 5 x 6 mm
2 SMD package.
Read more...
printer friendly version