ROHM’s New ±1% Accuracy Current Sense Amplifier ICs BD1421x-LA Series Reduce Mounting Area by Approx. 46% Over Conventional Configurations
ROHM has recently developed the space-saving, high accuracy current sense amplifier ICs (BD1421x-LA series) for industrial applications – including wireless base stations, PLCs, and inverters – as well as consumer applications such as home appliances.
For some years the demand for current sensing is increasing in several applications. For example, high accuracy current sensing is required to improve motor rotation efficiency and detect abnormalities. At the same time, a smaller mounting area is required. However, conventional configurations (operational amplifier + discrete components) generally face challenges such as deterioration of current sensing accuracy due to variations in component accuracy and temperature characteristics. Also, it is difficult to keep the mounting area small.
In response, ROHM leveraged its strengths in analog technology to develop a new series of current sense amplifier ICs that achieves high accuracy current sensing in a space-saving design. The BD14210G-LA incorporates all required peripheral components. That simplifies current sensing by connecting a shunt resistor and a bypass capacitor. This reduces the number of components from eleven to just three compared to conventional configurations (operational amplifier + discrete components). Furthermore, it decreases the mounting area by 46% (SSOP6 package). Additionally, a highly accurate current detection of ±1% has been achieved over the entire temperature range (-40℃ to +125℃). The internal circuitry prevents current detection accuracy from decreasing even when an external RC filter circuit for noise suppression is added. That minimizes the number of man-hours required for design. The wide input voltage range (-0.2V to +26V) makes the BD14210G-LA ideal for current sensing applications operating from 12V/24V power supplies.
ROHM provides current sensing solutions that combine the new current sense amplifier ICs with an extensive lineup of shunt resistors. More support material, such as reference designs, are available. We also offer SPICE models that can be downloaded from ROHM’s website.
Product Lineup
In addition to the BD14210G-LA which is already in mass production, 8 models are scheduled to be released. The lineup will include both 1 channel and 2 channel variants in four different gain settings (20, 50, 100, 200V/V).
☆: Under Development
Application Examples
Industrial equipment: wireless base stations, PLC, inverters, chargers, etc.
Consumer devices: air purifiers, refrigerators, and more.
Reference Design
Support materials such as a reference design (REFSENS003) along with SPICE models are available on ROHM’s website.
Online Sales Information
Applicable Part No: BD14210G-LATR
Availability: Now (in mass production)
evaluation board information
Evaluation Board Part No: BD14210G-EVK-001
- +1 Like
- Add to Favorites
Recommend
- Silicon Carbide cooperation between SEMIKRON and ROHM Semiconductor: ROHM’s SiC technology empowers SEMIKRON’s eMPack® for the next generation of electric vehicles
- Notice of Integration of ROHM Three Sales Companies in China
- Continental acknowledges ROHM Semiconductor with the “Supplier of the Year 2022 Award“
- ROHM Online Distributor China | Sekorm
- ROHM‘s Nano Energy™ and LAPIS Technology‘s Charge Control IC Help Maxell Energy Harvesting-compatible Evaluation Kit
- ROHM SiC MOSFETs Solve Design Challenges for Leading Solar Energy Company Midnite Solar
- Ultra-Low IQ PMIC from ROHM Selected to Power NXP iMX8M Nano for High Performance Embedded Artists Industrial Control Board
- ROHM and Sanden Huayu Annouced a Joint Technology Laboratory, Including Automotive Air-conditioning Systems
This document is provided by Sekorm Platform for VIP exclusive service. The copyright is owned by Sekorm. Without authorization, any medias, websites or individual are not allowed to reprint. When authorizing the reprint, the link of www.sekorm.com must be indicated.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
