ADI ADuM6420A隔离器解决方案

ADI ADuM6420A集成DC／DC转换器的四通道隔离器解决方案
ADI公司的ADuM6420A/ADuM6421A/ADuM6422A是四通道隔离器,集成了四个iCoupler®开关键控(OOK) 数字隔离通道和iCoupler芯片级isoPower®变压器技术,它可在要求高达500 mW的隔离式电源的应用中实现小外形尺寸增强型隔离式信号和电源解决方案.器件可高温运行在125℃(最大值),具有高共模瞬变抗扰度为100 kV/μs.主要用在RS-232收发器,电源起动偏压和栅极驱动,隔离传感器接口以及工业可编逻辑控制器(PLC). 为您整理如下详细资料，本文介绍了ADuM6420A/ADuM6421A/ADuM6422A1主要特性,框图以及评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURNZ主要特性,电路图,材料清单和PCB设计图.
The ADuM6420A/ADuM6421A/ADuM6422A1 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-layer printed circuit board (PCB) with ferrites. Popular voltage combinations and the associated output current levels are listed in Table 1.
The ADuM6420A/ADuM6421A/ADuM6422A eliminate the need for a separate, isolated dc-to-dc converter in 500 mW, isolated designs. The iCoupler chip sca le 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 isolators provide four independent isolation channels (see the Pin Configurations and Function Descriptions for additional information).
ADuM6420A/ADuM6421A/ADuM6422A1主要特性:
isoPower integrated, isolated dc-to-dc converter
100 mA output supply
Meets CISPR 32/EN550 32 Class B emission limits up to 5 Mbps at a full load on a 2-layer PCB
Quad dc to 100 Mbps signal isolation channels
28-lead, fine pitch, SOIC with 8.3 mm minimum creepage
High temperature operation: 125℃ maximum
High common-mode transient immunity: 100 kV/μs
Safety and regulatory approvals (pending)
UL re cog nition (pending)
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A (pending)
VDE V 0884-11 certificate of conformity (pending)
VIORM = 566 V peak
ADuM6420A/ADuM6421A/ADuM6422A1应用:
RS-232 transceivers
Power supply start-up bias and gate drives
Isolated sensor interfaces
Industrial programmable logic controllers (PLCs)
图1.ADuM6420A/ADuM6421A/ADuM6422A1框图
评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURNZ
Evaluating the ADuM6420A/ADuM6421A/ADuM6422A Quad-Channel Isolators with Integrated DC-to-DC Converter
This iCoupler transformer technology enable s 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 the ADuM6420A/ADuM6421A/ADuM6422A data sheet.
The ADuM6420A/ADuM6421A/ADuM6422A 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 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 digital isolator with integrated, isolated dc-to-dc converter. Alternatively, the EVAL-ADUM6421AURNZ leaves the isolator position unpopulated to support evaluation of the ADuM6420A, ADuM6421A, or ADuM6422A.
Full specifications for the ADuM6420A/ADuM6421A/ ADuM6422A are available in the
ADuM6420A/ADuM6421A/ ADuM6422A data sheet, which must be consulted in conjunction with this user guide when using the evaluation boards.
评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURNZ主要特性:
isoPower integrated, isolated dc-to-dc converter
Meets CISPR 32/EN 55032, Class B emission limits
On-board 6 V to 9 V LDO power supply that provides 5 V to the VDDP pin
5 V input operation and selectable 3.3 V or 5 V isolated dc-to-dc converter output
Screw terminal connectors for the following
LDO power supply
5 V direct power supply
Off board PDIS control
Isolated output supply
评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURNZ包括:
EVAL-ADuM6421ARNZ, includes the ADuM6421ABRNZ5
EVAL-ADuM6421AURNZ, requires the ADuM6420A, ADuM6421A, or ADuM6422A to be ordered separately
图2.评估板EVAL-ADUM6421ARNZ外形图
图3.评估板EVAL-ADUM6421AURNZ外形图
图4.评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURN电路图
评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURN材料清单:
图5.评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURN PCB设计图(1):顶层
图6.评估板EVAL-ADUM6421ARNZ/EVAL-ADUM6421AURN PCB设计图(2):底层。