IES5541AT Hendon Semiconductors, IES5541AT Datasheet

MOSFET & Power Driver ICs 50mA Triac Relay Protector

IES5541AT

Manufacturer Part Number

IES5541AT

Description

MOSFET & Power Driver ICs 50mA Triac Relay Protector

Manufacturer

Hendon Semiconductors

Type

Relay Driver with Contact Protectionr

Datasheet

1.IES5541AT.pdf (11 pages)

Specifications of IES5541AT

Product

Driver ICs - Various

Supply Voltage (max)

7.7 V

Supply Voltage (min)

6.4 V

Supply Current

140 uA

Maximum Power Dissipation

300 mW

Maximum Operating Temperature

+ 100 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

0 C

Number Of Drivers

Number Of Outputs

Output Current

20 mA

Package / Case

SO-8

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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• Protects relay contacts from damage during switching

• Significantly reduces Electro-Magnetic Interference

• Can be triggered by either a logic signal or sensor input

• Will support an increased relay switching rate

• Provides a complete sensing and control solution

• On chip circuit protection against triac gate spikes

• Low supply current requirement

• Significantly extends relay contact lifetime in constant

• Uses a small inexpensive triac to momentarily protect

• Intelligently triggers contact protecting circuit only when

• Sensor AC powered, thus minimising DC supply and

• Is able to protect relays connected to both resistive and

• Relay control does not suffer from the heat dissipation

• Can be used to drive a load other than a relay, directly

2007 Aug 16, Revision 1.1

due to arcing of mains voltage

(EMI) by reduction of switching transients and arcing

switching applications - ideal for heating element control

the relay from arcing during switching - open and close

transients are detected, and only during switching

filtering needs

inductive loads

limitations of similar triac control solutions

from the SCR

FEATURES

BLOCK DIAGRAM

@25°C

100k

NTC

100k

RV1

47uF

10V

SENS

IES5541A

100nF

CAP

Fig.1 Block diagram

latch

shunt

transient

detection

crossing

control

logic

zero

Relay Driver with Contact Protection

TSEN

The IES5541A is a monolithic bipolar control circuit for

driving a relay so as to protect its contacts from arcing

during switching operations. This IC will significantly

extend the lifetime of relays which would otherwise suffer

from burning, pitting and increased resistance of contacts,

eventually leading to complete fusing of the contacts.

Additionally, it will significantly reduce EMI / RFI noise

caused by arcing of the relay contacts, helping in achieving

regulatory requirements.

The IES5541A can be interfaced to a simple logic drive

from a microprocessor or other device. It may be

interfaced to a serial bus using a simple general purpose

I/O interface IC, allowing the circuit (or multiple circuits) to

be switched remotely. Alternately, it can be connected

directly to a resistive sensor such as an NTC (negative

temperature coefficient) thermistor. In this configuration it

provides a complete temperature control solution using

relay drive. It is ideal for use in situations where the heat

dissipation of a triac control solution causes problems.

(The contact protection triac in this circuit dissipates an

insignificant amount of power.)

In a typical application the IES5541A may be used for the

temperature control of a heating element in a cooktop,

electric iron, frying pan, or other relay switched mains

power control applications.

GENERAL DESCRIPTION

TYPICAL APPLICATION

stabalised

DC supply

-7V

Rpwr

PWR

VEE

COM

Rsg

Rtg

250Vac

C3 1nF

IES5541A-block cct

Contents are subject to the Disclaimer

SCR

Load

RE1

IES5541A

Triac

Active

Neutral

Product Specification

230Vac

mains

Related parts for IES5541AT

IES5541AT Summary of contents

Page 1

... Rb SENS C2 47uF 10V © 2006 Integrated Electronic Solutions Pty Ltd. trading as Hendon Semiconductors, all rights reserved. 2007 Aug 16, Revision 1.1 Relay Driver with Contact Protection 2 GENERAL DESCRIPTION The IES5541A is a monolithic bipolar control circuit for driving a relay protect its contacts from arcing during switching operations ...

Page 2

PINNING INFORMATION 5.1 Pinning layout (8 pin IES5541A 3 COM 4 SENS Fig.2 Pinning diagram (DIL-8 and SO-8) 6 FUNCTIONAL DESCRIPTION COM − Common DC supply 6.1 This DC supply rail for the control ...

Page 3

SCR gate pulse. This could much as 20ms delay (assuming 50Hz mains frequency) between CAP going high and the first SCR gate pulse. When the CAP pin is set “low”, the SCR gate drive will not ...

Page 4

LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134) Voltages are specified with respect to pin 3 (COM) SYMBOL PARAMETER V Supply voltage range ( Voltage range (PWR) PWR V Voltage range (CAP) CAP ...

Page 5

SYMBOL PARAMETER Sense input −V sense voltage SENS −V sense voltage SENS −∆ temperature sensitivity SENS V AC sense voltage SENS(rms sense voltage SENS(rms sense voltage SENS(rms sense voltage SENS(rms) V ...

Page 6

I NDUCTIVE LOADS It should be noted that for inductive loads the current will be lagging the voltage. Therefore every time the triac turns off it will produce a transient and hence be retriggered by the transient detection circuit ...

Page 7

R2 270k VR25 PWR 8 IES5541A SENS 4 VREG 3 6 CAP COM Vcc Micro- controller or 5V logic device Vee Fig.5 IES5541A application diagram: alternate options, for connecting a micro controller or other logic level input V DD Supply ...

Page 8

Additional components for critical applications, eg failsafe operation, Temperature Sense and Setting R1 VR1 NTC θ R2 Fig.8 IES5541A application diagram: alternative relay drive for 48V relays 2007 Aug 16, Revision 1.1 Relay Driver with Contact Protection Fig.7 IES5541A application ...

Page 9

... IES5541A P DIP8 plastic dual in-line package; 8 leads (300 mil) Other package options are available - contact Hendon Semiconductors for details. For more information on packages, please refer to the document “Integrated Circuit Packaging and Soldering Information” on the Hendon Semiconductors web site. ...

Page 10

... Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given advisory and does not form part of the specification. 14 COMPANY INFORMATION HENDON SEMICONDUCTORS a trading name of INTEGRATED ELECTRONIC SOLUTIONS PTY. LTD. ABN 17 080 879 616 Postal address: Hendon Semiconductors ...

Page 11

... Life Support Applications Products of Hendon Semiconductors (Hendon) are not designed for use in life support appliances, devices or systems, where malfunction can result in personal injury. Customers using or selling Hendon products for use in such applications their own risk and agree to fully indemnify Hendon for any damages resulting from such improper use or sale. ...

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