ADI-ADuM6420A带DC／DC转换器的四道数字隔离器解决技术方案

1、AO-Electronics傲壹电子官网：中文网：ADI ADuM6420A带DCDC转换器的四道数字隔离器解决方案 ADI公司的ADuM6420A/ADuM6421A/ADuM6422A是采用isoPower集成隔离式直流/直流转换器的四通道数字隔离器.基于 ADI 公司的iCoupler技术,可提供稳压隔离式电源,在配备铁氧体的 2 层印刷电路板(PCB)上在满载时符合 CISPR 32/EN 55032 B 级限制.100mA输出电流,满足AEC-Q100汽车应用规范, 在 500 mW的隔离式设计中不再需要单独的隔离式直流/直流转换器.具有四路DC到100Mbps信号隔离通路,可提供外

2、形小巧四个独立的完全隔离式解决方案.高温125C工作温度,共模瞬态免疫为100 kV/s, VIORM = 566 V peak.主要用在RS-232 收发器,电源启动偏置和栅极驱动,隔离式传感器接口和工业可编程逻辑控制器(PLC)以及汽车车载充电器(OBC)和DC/DC转换器.本文介绍了ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A主要特性,功能框图,.评估板EVAL-ADUM6421ARNZ/ EVAL-ADUM6421AURNZ主要特性,电路图,材料清单和PCB设计图.The ADuM6420A/ADuM6421A/ADuM6422A

3、/ADuM6423A/ ADuM6424A1 are quad-channel digital isolators with an isoPower, integrated, isolated dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler technology, the dc-to-dc converter provides regulated, isolated power that meets CISPR 32/EN 55032 Class B limits at a full load on a 2-lay

4、er printed circuit board (PCB) with ferrites. Popular voltage combinations and the associated output current levels are listed in Table 1.The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A eliminate the need for a separate, isolated dc-to-dc converter in 500 mW, isolated designs. The iCoupler ch

5、ip scale transformer technology is used for isolated logic signals and for the magnetic components of the dc-to-dc converter. The result is a small form factor, total isolation solution.The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A isolators provide four independent isolation channels (see

6、the Pin Configurations and Function Descriptions for additional information).ADuM6420A主要特性:isoPower integrated, isolated dc-to-dc converter100 mA output supplyAEC-Q100 qualified for automotive applicationsADuM6421AW (ADuM6423AW pending)Meets CISPR 32/EN55032 Class B emission limits up to 5 Mbps at a

7、 full load on a 2-layer PCBQuad dc to 100 Mbps signal isolation channels28-lead, fine pitch, SOIC with 8.3 mm minimum creepageHigh temperature operation: 125C maximumHigh common-mode transient immunity: 100 kV/sSafety and regulatory approvals (pending)UL recognition (pending)5000 V rms for 1 minute

8、per UL 1577CSA Component Acceptance Notice 5A (pending)VDE V 0884-11 certificate of conformity (pending)VIORM = 566 V peakCQC certification per GB4943.1-2011 (pending)ADuM6420A应用:RS-232 transceiversPower supply start-up bias and gate drivesIsolated sensor interfacesAutomotive on-board charger (OBC)

9、and dc to dcIndustrial programmable logic controllers (PLCs)图1.ADuM6420A功能框图评估板EVAL-ADUM6421ARNZThe ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A devices integrate four iCoupler on-off keying (OOK) digital isolation channels and iCoupler chip scale isoPower transformer technology.This iCoupler

10、transformer technology enables a small form factor integrated, reinforced isolated signal and power solution, in applications requiring up to 500 mW of isolated power.Available dc-to-dc converter supply configurations and maximum available power at the elevated ambient temperatures are specified in

11、the ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A data sheet.The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A devices provide regulated, isolated power that meets CISPR 32/EN 55032, Class B limits at full load on a 2-layer printed circuit board (PCB) with ferrite beads. Radiated emissions

12、 test plots of the EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURNZ are provided in Figure 4 and Figure 5. All devices in the family include the same isolated dc-to-dc converter and are differentiated by directional digital channel configurations.The EVAL-ADUM6421ARNZ includes the ADuM6421ABRNZ5 quad-channel di

13、gital isolator with integrated, isolated dc-to-dc converter. Alternatively, the EVAL-ADUM6421AURNZ leaves the isolator position unpopulated to support evaluation of the ADuM6420A, ADuM6421A, ADuM6422A, ADuM6423A, or ADuM6424A.Full specifications for the ADuM6420A/ADuM6421A/ ADuM6422A/ADuM6423A/ADuM6

14、424A are available in the ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ ADuM6424A data sheet, which must be consulted in conjunction with this user guide when using the evaluation boards.评估板EVAL-ADUM6421ARNZ主要特性:isoPower integrated, isolated dc-to-dc converterMeets CISPR 32/EN 55032, Class B emission lim

15、itsOn-board 6 V to 9 V LDO power supply that provides 5 V to the VDDP pin5 V input operation and selectable 3.3 V or 5 V isolated dc-to-dc converter outputScrew terminal connectors for the followingLDO power supply5 V direct power supplyOff board PDIS controlIsolated output supplyEVALUATION KIT CONTENTSEVAL-ADUM6421ARNZ, includes the ADuM6421ABRNZ5EVAL-ADUM6421AURNZ, requires the ADuM6420A, ADuM6421A, ADuM6422A, ADuM6423A, or ADuM6424A to be ordered separately图2.评估板