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Application Circuit (Current sensing) of the TLP7820 Isolation Amplifier

This reference design provides design guide and example of simulation waveform for phase current detection with optical isolation amplifier for motor control of servo and inverter.

Application block diagram of aplication circuit (current sensing) of the TLP7820 isolation amplifier.

Application Block Diagram

Applicatoin circuit diagram of aplication circuit (current sensing) of the TLP7820 isolation amplifier.

Applicatoin Circuit Diagram

Features

Optically coupled isolation amplifier
Common mode noise imunity : 15kV/μs(Min)
Low comsumption current : Primary side 8.6mA(typ.), Secondary side 6.2mA(typ.)
Thin package(SO8L) contributes flexible PCB design

Description

Description of TLP7820 signature functions and features, especially common mode transient immunity, nonlenearity feature and low cosumption current
Design guide for the typical application circuit, current sensing circuit
Operation confirmation by Spice simulation

Design Documents

Design Documents contain the documents below.

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Name
Date

Reference guide Reference guide PDF:2.2MB

Apr, 2018

Circuit diagram Circuit diagram ZIP:214KB

Apr, 2018

BOM BOM PDF:396KB

Apr, 2018

Design Data

Design Data contains the contents listed below.

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Name
Date

Circuit diagram Circuit schematic (OrCAD^®) ZIP:210KB

Apr, 2018

Simulation Data Simulation file (PSpice^®) ZIP:251KB

Apr, 2018

Used Toshiba Items

Part Number	Device Category	Portion Usage	Description
TLP7820	Photocoupler(Isolation Amplifier)	signal amplifier・1	Photocoupler(Isolation Amplifier), Analog output, 5000 Vrms, SO8L(LF4)

Related Documents

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Name
Date

Application Note Glossary of Isolation Amplifier Terms PDF:789KB

Feb, 2019

Catalog Photocouplers and Photorelays Product Notes PDF:5.9MB

Sep, 2017

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