TI ISO6742：安全数字隔离器，满足工业级电磁兼容与功能安全需求

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TI-ISO6742.pdf是一份关于通用型增强型四通道数字隔离器的技术文档，这些隔离器专为满足严格的电磁兼容性和功能安全需求而设计。以下是该产品的主要特性： 1. **功能安全支持**：文档提供了ISO6740、ISO6741和ISO6742等标准，以协助用户设计功能安全系统，确保隔离器在工业应用中的可靠性和安全性。 2. **高速数据传输**：能实现高达50Mbps的数据传输速率，这对于实时控制和通信系统非常重要。 3. **强健的隔离屏障**：隔离器可在1500VRMS的工作电压下长时间稳定运行，具有高达5000VRMS的隔离等级和10kV的浪涌防护能力。典型的共模输入电压差（CMTI）为±75kV/μs，保证了极高的隔离效果。 4. **宽广的供电范围**：工作电压支持1.71V至1.89V和2.25V至5.5V，灵活性高，适应各种电源环境。 5. **级转换选项**：提供ISO674x（默认输出高）和ISO674xF（默认输出低）两种选项，可根据具体应用需求调整。 6. **宽温度范围**：设计适用于极端环境，工作温度可达-40°C至125°C。 7. **低功耗**：每个通道在1Mbps速率下典型电流仅为1.6mA，节省能源，延长设备寿命。 8. **快速响应时间**：具有低传播延迟，典型值为11ns，有助于保持系统的高效性。 9. **卓越的EMC性能**：通过系统级别的ESD（静电放电）、EFT（浪涌耐受）和 Surge（过电压保护）测试，以及±8kV IEC61000-4-2接触放电保护，确保隔离器在电磁干扰环境中的稳健性。 10. **小型封装**：采用宽体SOIC (DW-16) 封装，占用空间小，便于集成。 11. **安全认证**：产品已获得多项国际和国内的安全相关认证，如DINVDEV0884-11、UL1577、IEC62368-1、IEC61010-1和IEC60601-1，以及GB4943.1-2011（待定）。这些特性使得TI-ISO6742非常适合应用于电源供应、电力计量、电机驱动和各类需要电气隔离的工业自动化系统中，确保了设备的可靠性、稳定性及安全性。

7.4 Thermal Information

THERMAL METRIC

(1)

ISO674x

UNITDW (SOIC)

16 PINS

θJA

Junction-to-ambient thermal resistance 73 °C/W

θJC(top)

Junction-to-case (top) thermal resistance 36.1 °C/W

θJB

Junction-to-board thermal resistance 40.4 °C/W

Junction-to-top characterization parameter 17 °C/W

Junction-to-board characterization parameter 39.9 °C/W

θJC(bot)

Junction-to-case (bottom) thermal resistance — °C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

7.5 Power Ratings

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

ISO6740

Maximum power dissipation (both sides)

CC1

= V

CC2

= 5.5 V, T

= 150°C, C

15 pF, Input a 25-MHz 50% duty cycle

square wave

130.9 mW

Maximum power dissipation (side-1) 33 mW

Maximum power dissipation (side-2) 97.9 mW

ISO6741

Maximum power dissipation (both sides)

CC1

= V

CC2

= 5.5 V, T

= 150°C, C

15 pF, Input a 25-MHz 50% duty cycle

square wave

134.9 mW

Maximum power dissipation (side-1) 50.8 mW

Maximum power dissipation (side-2) 84.1 mW

ISO6742

Maximum power dissipation (both sides)

CC1

= V

CC2

= 5.5 V, T

= 150°C, C

15 pF, Input a 25-MHz 50% duty cycle

square wave

137.5 mW

Maximum power dissipation (side-1) 68.75 mW

Maximum power dissipation (side-2) 68.75 mW

www.ti.com

ISO6740, ISO6741, ISO6742

SLLSFJ6E – DECEMBER 2019 – REVISED JUNE 2021

Submit Document Feedback

Product Folder Links: ISO6740 ISO6741 ISO6742

7.6 Insulation Specifications

PARAMETER TEST CONDITIONS

VALUE

UNIT

DW-16

CLR External clearance

(1)

Shortest terminal-to-terminal distance through air >8 mm

CPG External creepage

(1)

Shortest terminal-to-terminal distance across the

package surface

>8 mm

DTI Distance through the insulation Minimum internal gap (internal clearance) >17 um

CTI Comparative tracking index DIN EN 60112 (VDE 0303-11); IEC 60112 >600 V

Material group According to IEC 60664-1 I

Overvoltage category per IEC 60664-1

Rated mains voltage ≤ 600 V

RMS

I-IV

Rated mains voltage ≤ 1000 V

RMS

I-III

DIN VDE V 0884-11:2017-01

(2)

IORM

Maximum repetitive peak isolation voltage AC voltage (bipolar) 2121 V

IOWM

Maximum working isolation voltage

AC voltage; Time dependent dielectric breakdown

(TDDB) Test; See Figure 10-8

1500 V

RMS

DC voltage 2121 V

IOTM

Maximum transient isolation voltage

TEST

= V

IOTM

t = 60 s (qualification);

TEST

= 1.2 x V

IOTM

t= 1 s (100% production)

7071 V

IOSM

Maximum surge isolation voltage

(3)

Test method per IEC 62368-1, 1.2/50 µs waveform,

TEST

= 1.6 x V

IOSM

= 10,000 V

(qualification)

6250 V

Apparent charge

(4)

Method a, After Input-output safety test subgroup 2/3,

ini

= V

IOTM

, t

ini

= 60 s;

pd(m)

= 1.2 x V

IORM

, t

= 10 s

≤5

Method a, After environmental tests subgroup 1,

ini

= V

IOTM

, t

ini

= 60 s;

pd(m)

= 1.6 x V

IORM

, t

= 10 s

≤5

Method b; At routine test (100% production) and

preconditioning (type test)

ini

= 1.2 x V

IOTM

, t

ini

= 1 s;

pd(m)

= 1.875 x V

IORM

, t

= 1 s

≤5

Barrier capacitance, input to output

(5)

= 0.4 x sin (2πft), f = 1 MHz ~1 pF

Isolation resistance

(5)

= 500 V, T

= 25°C >10

ΩV

= 500 V, 100°C ≤ T

≤ 125°C >10

= 500 V at T

= 150°C >10

Pollution degree 2

Climatic category 40/125/21

UL 1577

ISO

Maximum withstanding isolation voltage

TEST

= V

ISO

, t = 60 s (qualification),

TEST

= 1.2 x V

ISO

, t = 1 s (100% production)

5000 V

RMS

(1) Creepage and clearance requirements should be applied according to the specific equipment isolation standards of an application.

Care should be taken to maintain the creepage and clearance distance of a board design to ensure that the mounting pads of

the isolator on the printed-circuit board do not reduce this distance. Creepage and clearance on a printed-circuit board become

equal in certain cases. Techniques such as inserting grooves and/or ribs on a printed-circuit board are used to help increase these

specifications.

(2) This coupler is suitable for safe electrical insulation only within the safety ratings. Compliance with the safety ratings shall be ensured

by means of suitable protective circuits.

(3) Testing is carried out in air or oil to determine the intrinsic surge immunity of the isolation barrier.

(4) Apparent charge is electrical discharge caused by a partial discharge (pd).

(5) All pins on each side of the barrier tied together creating a two-terminal device.

ISO6740, ISO6741, ISO6742

SLLSFJ6E – DECEMBER 2019 – REVISED JUNE 2021

www.ti.com

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Product Folder Links: ISO6740 ISO6741 ISO6742

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