SI88641ED-IS datasheet, PDF - EEWORLD Datasheet

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SI88641ED-IS: DescriptionQUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER; File Size908KB，48 Pages; ManufacturerSILABS; Websitehttp://www.silabs.com

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QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER

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Si88x4x

U A D

IGITAL

SOL A TORS W I T H

DC-DC C

O N V E RT E R

Features



High-speed isolators with



integrated dc-dc converter



Fully-integrated secondary sensing

feedback-controlled converter with



dithering for low EMI

dc-dc converter peak efficiency of

83% with external power switch



Up to 5 W isolated power with



external power switch

Options include dc-dc shutdown,



frequency control, and soft start



Standard Voltage Conversion



3/5 V to isolated 3/5 V



24 V to isolated 3/5 V supported

Precise timing on digital isolators



0–100 Mbps



18 ns typical prop delay

Highly-reliable: 100 year lifetime

High electromagnetic immunity and

ultra-low emissions

RoHS compliant packages



SOIC-20 wide body



SOIC-24 wide body

Isolation of up to 5000 Vrms

High transient immunity of

100 kV/µs (typical)

AEC-Q100 qualified

Wide temp range



–40 to +125 °C

Ordering Information:

See page 38.

Pin Assignments

See page 33

GNDP

VSW

VDDP

GNDB

VDDB

DNC

VSNS

COMP

Applications



Industrial automation systems

Hybrid electric and electric

vehicles



Isolated power supplies



Inverters

Data acquisition

Motor control

PLCs, distributed control systems

VDDA

GNDA

Isolation Barrier

XMTR

RCVR

Safety Approval (Pending)



XMTR

RCVR

UL 1577 recognized



Up to 5000 Vrms for 1 minute



CSA component notice 5A

approval



VDE certification conformity



VDE 0884-10



CQC certification approval



GB4943.1

XMTR

RCVR

XMTR

RCVR

Si88240

Patents pending

Description

The Si88xx integrates Silicon Labs’ proven digital isolator technology with an

on-chip isolated dc-dc converter that provides regulated output voltages of

3.3 or 5.0 V (or >5 V with external components) at peak output power levels

of up to 5 W. These devices provide up to four digital channels. The dc-dc

converter has user-adjustable frequency for minimizing emissions, a soft-start

function for safety, a shut-down option and loop compensation. The device

requires only minimal passive components and a miniature transformer.

The ultra-low-power digital isolation channels offer substantial data rate,

propagation delay, size and reliability advantages over legacy isolation

technologies. Data rates up to 100 Mbps max are supported, and all devices

achieve propagation delays of only 23 ns max. Ordering options include a

choice of dc-dc converter features, isolation channel configurations and a fail-

safe mode. All products are certified by UL, CSA, VDE, and CQC.

Preliminary Rev. 0.6 7/15

Si88x4x

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Si88x4x

ABLE

Section

ONTENTS

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.1. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.2. Digital Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3. DC-DC Converter Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.4. Transformer Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3. Digital Isolator Device Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.1. Device Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.2. Undervoltage Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3. Layout Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.4. Fail-Safe Operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.5. Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6. Package Outline: 20-Pin Wide Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7. Land Pattern: 20-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

8. Package Outline: 24-Pin Wide Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9. Land Pattern: 24-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

10. Top Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

10.1. Si88x4x Top Marking (20-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . . . . 45

10.2. Top Marking Explanation (20-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . 45

10.3. Si88x4x Top Marking (24-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . . . . 46

10.4. Top Marking Explanation (24-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . 46

Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Preliminary Rev. 0.6

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