Texas Instruments ISOW7844 Bedienungsanleitung

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ISOW784x High-Performance, 5000-V

RMS

Reinforced Quad-Channel Digital Isolators

with Integrated High-Efficiency, Low-Emissions DC-DC Converter

1 Features

•100 Mbps data rate

•Robust isolation barrier:

–>100-Year projected lifetime at 1 kV

RMS

working voltage

–Up to 5000 V

RMS

isolation rating

–Up to 10 kV

PK

surge capability

–±100 kV/µs minimum CMTI

•Integrated high-efficiency DC-DC converter with

on-chip transformer

•3-V to 5.5-V Wide input supply range

•Regulated 5-V or 3.3-V output

•Up to 0.65-W output power

•5 V to 5 V; 5 V to 3.3 V: Available load current ≥

130 mA

•3.3 V to 3.3 V: Available load current ≥ 75 mA

•3.3 V to 5 V: Available load current ≥ 40 mA

•Soft-start to limit inrush current

•Overload and short-circuit protection

•Thermal shutdown

•Default output: High and Low options

•Low propagation delay: 13 ns Typ (5-V supply)

•Robust electromagnetic compatibility (EMC)

–System-level ESD, EFT, and surge immunity

–±8 kV IEC 61000-4-2 contact discharge

protection across isolation barrier

–Low emissions

•16-pin Wide SOIC package

•Extended temperature range: –40°C to +125°C

•Safety-related certifications:

–7071-V

PK

reinforced isolation per DIN V VDE V

0884-11:2017-01

–5000-V

RMS

isolation for 1 minute per UL 1577

–CSA Certification per IEC 60950-1, IEC

62368-1 and IEC 60601-1 end equipment

standards

–CQC Approval per GB4943.1-2011

–TUV Certification according to EN 60950-1 and

EN 61010-1

2 Applications

•Industrial automation

•Motor control

•Grid infrastructure

•Medical equipment

•Test and measurement

3 Description

The ISOW784x is a family of high-performance, quad-

channel reinforced digital isolators with an integrated

high-efficiency power converter. The integrated DC-

DC converter provides up to 650 mW of isolated

power at high efficiency and can be configured

for various input and output voltage configurations.

Therefore these devices eliminate the need for a

separate isolated power supply in space-constrained

isolated designs.

Device Information

PART NUMBER

(1)

PACKAGEBODY SIZE (NOM)

ISOW7840

ISOW7841

ISOW7842

ISOW7843

ISOW7844

SOIC (16)10.30 mm × 7.50 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

DC-DC

Primary

DC-DC

Secondary

V

CC

V

ISO

OUTx

V

SO

Isolation Capacitors

Isolation Transformer

GNDI

GNDO

V

SI

INx

V

CC

is the primary supply voltage referenced to GND1. V

ISO

is

the isolated supply voltage referenced to GND2.

V

SI

and V

SO

can be either V

CC

or V

ISO

depending on the

channel direction.

V

SI

is the input-side supply voltage referenced to GNDI and

V

SO

is the output-side supply voltage referenced to GNDO.

Simplified Schematic

ISOW7840, ISOW7841, ISOW7842, ISOW7843, ISOW7844

SLLSEY2G – MARCH 2017 – REVISED AUGUST 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspezifikationen