ROHM’s New ±1% Accuracy Current Sense Amplifier ICs BD1421x-LA Series Reduce Mounting Area by Approx. 46% Over Conventional Configurations

时间： 2023-03-14 来源：ROHM News

技术问答

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

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应用笔记或设计指南 - ROHM - Ver.3.1 - 11.2023 PDF 英文下载查看更多版本

Application Brochure for INDUSTRIAL

型号- BD52W04G-C,BM2P06XMF-Z 系列,R6009RND3,BD900N1W,R6077VNZ,BM6437X 系列,LTR100L,BM2SCQ123T-LBZ,R6007RND3,BM2SCQ122T-LBZ,CSL1901 系列,BD900N1G-C,RFL60TS6D,RBR2VWM60A,BD933N1,RBR1VWM40A,BD933N1WG-C,BM2SC12XFP2-LBZ,BD52W01G-C,LTR18,MCR10L,CSL1901,RB068VWM-60,BP3622,BP3621,BD14210G-LA,SCT4013DW7,R6035VNX3,RB068VWM150,MCR18L,R60XXVNX 系列,LTRL系列,BD1421X-LA 系列,RFS30TS6D,BD950N1WEFJ-C,CSL1901DW,QH8KXX 系列,BD950N1WG-C,BM2LE160FJ-C,BM2P060LF-Z,BM2SC124FP2-LBZ,BV1LE080EFJ-C,BM2SC123FP2-LBZ,SH8MC5,SCT4018KW7,QH8MX5 系列,RB168VWM-40,QH8KB5,R6013VNX,QH8KB6,RBR2VWM30A,BM2LE250FJ-C,RGW00TS65CHR,BM2LEXXXFJ-C 系列,SCT4045DW7,BV1LE250EFJ-C,SCT4036KE,SCT4018KE,BD9XXN1 系列,QH8MX5,RFS 系列,SCT4045DE,R6024VNX,BM2SCQ124T-LBZ,BD52W03G-C,SCT4026DE,BM2SCQ121T-LBZ,R60XXRNX 系列,R6055VNX,RB168VWM-60,BD48W00G-C,R6018VNX,R6055VNZ,SCT4045DR,RBR1VWM30A,SH8MB5,SCT4018KR,RGW80TS65CHR,SCT4026DR,R6035VNX,CSL1901MW,QH8KC6,MCRL,LTR10L,QH8KC5,RB168VWM150,R60A4VNZ4,BM2P061MF-Z,BD52W06G-C,BM6437X,CSL1901UW,BM64378S-VA,SCT4062KR,BD900N1EFJ-C,SCT4013DE,BM2P063MF-Z,MCRL系列,R6024VNX3,SCT4013DR,LTR100,BD7XXL05G-C,BD950N1,BD48HW0G-C,RB068VWM100,BM2P06XMF-Z,RBR2VWM40A,RFL,BD9XXN1,SH8KXX,CSL1901VW,R6077VNZ4,RFS,BM1390GLV-Z,RGWXX65C,RBR1VWM60A,BD14215FVJ-LA,QH8KXX,BD52W05G-C,R6055VNX3,SCT4036KR,RFL30TS6D,BM2SC12XFP2-LBZ 系列,BM2LEXXXFJ-C,BD900N1WEFJ-C,BD7XXL05G-C 系列,RFS60TS6D,BD733L05G-C,LTR50,BD933N1WEFJ-C,SCT4062KE,RB168VWM-30,SCT4036KW7,BM64374S-VA,BD950N1W,BD725L05G-C,BM2LE040FJ-C,R6004RND3,BD933N1W,BD730L05G-C,BD750L05G-C,BM2SC121FP2-LBZ,BM2SC122FP2-LBZ,BD900N1,BD933N1G-C,BM2P061LF-Z,BD52W02G-C,SH8KC6,SH8KXX 系列,BV1LEXXXEFJ-C 系列,LTR,BM64375S-VA,SH8KC7,BM64377S-VA,BD933N1EFJ-C,BD950N1EFJ-C,BM2LE080FJ-C,SH8MX5,QH8MB5,SCT4062KW7,R60XXVNX,RB168VWM100,SH8MX5 系列,R60XXRNX,RBLQ2VWM10,BD950N1G-C,LTRL,SCT4026DW7,RGW60TS65CHR,RGWXX65C 系列,BV1LE040EFJ-C,R6055VNZ4,BM2P060MF-Z,RFS60TZ6S,RFS30TZ6S,BD900N1WG-C,SH8KB7,RB068VWM-40,SH8KB6,RB068VWM-30,BV1LE160EFJ-C,RFL30TZ6S,QH8MC5,CSL1901YW,BD1421X-LA,BV1LEXXXEFJ-C,RFL60TZ6S,RFL 系列,R6013VND3

商品及供应商介绍 - ROHM - Ver. 3.0 - 06.2023 PDF 中文下载

Application Brochure for INDUSTRIAL

型号- BD52W04G-C,SH8KXX SERIES,R6009RND3,BD900N1W,QH8KXX SERIES,R6077VNZ,LTR100L,BM2SCQ123T-LBZ,R6007RND3,BM2SCQ122T-LBZ,BD900N1G-C,RFL60TS6D,LTRL SERIES,RBR2VWM60A,BD9XXN1 SERIES,BD933N1,RFS SERIES,RBR1VWM40A,BD933N1WG-C,BM2SC12XFP2-LBZ,BD52W01G-C,LTR18,MCR10L,CSL1901,RB068VWM-60,BP3622,BP3621,BD14210G-LA,SCT4013DW7,BM2P06XMF-LBZ,R6035VNX3,RB068VWM150,MCR18L,R60XXRNX SERIES,RFS30TS6D,BD950N1WEFJ-C,CSL1901DW,BD950N1WG-C,BM2LE160FJ-C,BM2P060LF-Z,BM2SC124FP2-LBZ,BV1LE080EFJ-C,QH8MX5 SERIES,BM2SC123FP2-LBZ,SH8MC5,SCT4018KW7,RB168VWM-40,QH8KB5,R6013VNX,QH8KB6,RGWXX65C SERIES,RBR2VWM30A,BM2LE250FJ-C,RGW00TS65CHR,RFL SERIES,SH8MX5 SERIES,SCT4045DW7,BV1LE250EFJ-C,SCT4036KE,SCT4018KE,QH8MX5,SCT4045DE,R6024VNX,BM2SCQ124T-LBZ,BD52W03G-C,SCT4026DE,BM2SCQ121T-LBZ,R6055VNX,RB168VWM-60,BD48W00G-C,R6018VNX,R6055VNZ,SCT4045DR,RBR1VWM30A,SH8MB5,SCT4018KR,RGW80TS65CHR,SCT4026DR,R6035VNX,MCRL,CSL1901MW,QH8KC6,LTR10L,QH8KC5,RB168VWM150,R60A4VNZ4,BD7XXL05G-C SERIES,BM2P061MF-Z,BD52W06G-C,BM6437X,CSL1901UW,BM64378S-VA,SCT4062KR,BD900N1EFJ-C,SCT4013DE,BM2P063MF-Z,R6024VNX3,SCT4013DR,LTR100,BD7XXL05G-C,R60XXVNX SERIES,BD950N1,BD48HW0G-C,RB068VWM100,RBR2VWM40A,BD1421X-LA SERIES,RFL,BD9XXN1,SH8KXX,CSL1901VW,RFS,R6077VNZ4,RGWXX65C,BM1390GLV-Z,RBR1VWM60A,BD14215FVJ-LA,BM6437X SERIES,QH8KXX,BD52W05G-C,R6055VNX3,LTR SERIES,BM2P06XMF-LBZ SERIES,SCT4036KR,RFL30TS6D,BM2LEXXXFJ-C,BD900N1WEFJ-C,RFS60TS6D,BD733L05G-C,LTR50,BD933N1WEFJ-C,SCT4062KE,RB168VWM-30,SCT4036KW7,BM2SC12XFP2-LBZ SERIES,BM64374S-VA,BD950N1W,BD725L05G-C,BM2LE040FJ-C,R6004RND3,BD933N1W,BD730L05G-C,BD750L05G-C,BM2SC121FP2-LBZ,BM2SC122FP2-LBZ,BD900N1,BD933N1G-C,BM2P061LF-Z,BD52W02G-C,SH8KC6,LTR,BM64375S-VA,SH8KC7,BM64377S-VA,BD933N1EFJ-C,BD950N1EFJ-C,BM2LE080FJ-C,SH8MX5,QH8MB5,SCT4062KW7,MCRL SERIES,R60XXVNX,BV1LEXXXEFJ-C SERIES,RB168VWM100,R60XXRNX,RBLQ2VWM10,BD950N1G-C,LTRL,SCT4026DW7,RGW60TS65CHR,BV1LE040EFJ-C,R6055VNZ4,BM2P060MF-Z,RFS60TZ6S,RFS30TZ6S,BD900N1WG-C,CSL1901 SERIES,SH8KB7,RB068VWM-40,SH8KB6,RB068VWM-30,BV1LE160EFJ-C,RFL30TZ6S,BM2LEXXXFJ-C SERIES,QH8MC5,CSL1901YW,BD1421X-LA,BV1LEXXXEFJ-C,RFL60TZ6S,R6013VND3

商品及供应商介绍 - ROHM - Ver. 3.0 - 06.2023 PDF 英文下载收起

BD7F200EFJ-LB Evaluation Board Isolated Flyback DC/DC Converter User’s Guide

型号- GRM188R71H471KA01,MCR01MZPF1203,MCR01MZPF1004,BD7F200EFJ-EVK-002,GRM32ER71H106KA12,TFZ20B,ESR10EZPF1001,CEP1311D-2405051R-10,MCR01MZPF3901,BD7F200EFJ-LB,RB160MM-40,GRM21BR71H105KA12,MCR03EZPFX3300,BD7F200EFJ,RB050LAM-30,GRM32ER71A476KE15,MCR01MZPF8062

用户指南 - ROHM - Rev.002 - NOV.2018 PDF 英文下载查看更多版本

Utilizing GaN Inverters for Battery-Powered Motor Drive Applications can Increase Power Density

GaN transistors and ICs increase power density in motor drive applications. An optimal lay-out approach allows obtaining ring-free output switching waveforms and clean current reconstruction signals either from leg shunts or from in-phase shunts.

应用方案发布时间 : 2021-10-22

LED Driver for Automotive Exterior lamps 1ch High Current LED Controller Boost LED Driver for Automotive BD18353EFV-M Evaluation Board User's Guide

型号- BD18353EFV-M,REFLED009,REFLED008,REFLED008-EVK-XXX,REFLED009-EVK-XXX,REFLED010-EVK-001,REFLED008-EVK-002,REFLED010-EVK-002,REFLED008-EVK-003,REFLED010,REFLED010-EVK-003,REFLED009-EVK-003,REFLED008-EVK-001,REFLED010-EVK-004,REFLED009-EVK-004,REFLED009-EVK-001,REFLED009-EVK-002,REFLED010-EVK-XXX,REFLED008-EVK-004

用户指南 - ROHM - Rev.002 - 09. Feb. 2024 PDF 英文下载查看更多版本

BD9611MUV-EVK-001 (24V → 12V, 10A): 1ch Buck switching regulator BD9611MUV EVK User's Guide

型号- GRM32EC72A106KE05K,MCR03EZPFX1203,GRM1882C1H103JA01D,MCR03EZPFX1502,GRM155R61H105KE05,RB161VAM-20TR,MCR03EZPFX7502,RD3L220SNTL1,MCR03EZPFX1001,MCR03EZPFX1002,PMR100PZPXFU5L00,MCR03EZPFX5101,GRM32EB31H106MA12,GRM1555C2A181JE01,GRM1882C1H222JA01,GRM188R71E474KA12D,BD9611MUV-EVK-001,BD9611MUV,MCR03EZPFX2702,GRM155R71E104KE14D,BD9611MUV-E2,CDEP147NP-7R7MC-95,MCR03EZPFX4300,MCR03EZPFX10R0,MCR03EZPFX2002,GRM21BC72A105KE01,UVR1H221MPD1TD

用户指南 - ROHM - Rev.004 - 30. Nov. 2022 PDF 英文下载

LED Driver for Automotive Panel Backlight 4ch White LED Driver Built-in Current Driver Boost DC/DC Converter for Automotive BD83A04EFV-M Evaluation Board REFLED002-EVK-001 User's Guide

型号- BD83A04EFV-M,REFLED002-EVK-001

用户指南 - ROHM - Rev.002 - 2. Dec. 2022 PDF 英文下载查看更多版本

ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package，Compact Size Reduces Component Area by 72%

ROHM has developed four new compact DC-DC step-down converter ICs suitable for consumer and industrial applications, including refrigerators, washing machines, PLCs, and inverters. ROHM is expanding the lineup which includes the BD9E203FP4-Z, a 2A buck converter with switching frequency of 350kHz.

产品发布时间 : 2024-04-26

Simple cell balancerEDLC cell balance LSIBD14000EFV-C evaluation board

型号- BD14000EFV-EVK-001,BD14000EFV-C

用户指南 - ROHM - Rev.001 - 2014.10.20 PDF 英文下载

BD9A101MUV-EVK-001 Step-Down DC/DC Converter BD9A101MUV-LB Evaluation Board User's Guide

型号- OSTTC022162,MJ254-6BK,EVK029,GRM188B31H104KA92D,BD9A101MUV-EVK-001,MCR03EZPFX2402,969102-0000-DA,PH-1X03SG,MCR03EZPJ000,FDSD0630-H-2R2M,GRM31CB31C106KA88L,MCR03EZPFX1002,TB111-2-2-U-1-1,GRM21BB30J226ME38L,MCR03EZPFX3002,61300311121,GRM188B11H103KA01D,MCR03EZPFX9101,GRM188B11H272KA01D,BD9A101MUV-LB

用户指南 - ROHM - Rev.001 - APR.2017 PDF 英文下载