Rainbow-electronics MAX4821 User Manual download pdf (Page 9)

Inductive Kickback Protection

The MAX4820/MAX4821 feature built-in inductive kick-

back protection to reduce the voltage spike on OUT_

generated by a relay’s coil inductance when the output

is suddenly switched off. Internal diodes connected

from each output to COM allow the inductor current to

flow back to the supply. Connect the common cathode

(COM) of the internal protection diodes to V

COM also can be connected to a higher voltage than

(+6V max) for faster kickback recovery. In this con-

figuration, bypass COM to PGND with a 0.1µF capacitor.

MAX4820/MAX4821

3.3V/+5V, 8-Channel, Cascadable Relay Drivers

with Serial/Parallel Interface

_______________________________________________________________________________________ 9

COMPANY PHONE WEBSITE

Aromat Corp. 310-524-9862 www.aromat.com

CP Clare Corp. 978-524-6700 www.crouzet.com

Coto Techonology 401-943-2686 www.cotorelay.com

Deustch Relays,

Inc.

516-499-6000 www.deutschrelays.com

Fujitsu

Takamisawa

408-745-4900 www.fujitsufta.com

Hella KG Hueck 734-414-0970 www.hella.com

COMPANY PHONE WEBSITE

NEC Electronics,

Inc.

800-366-9782 www.nec-global.com

Omron

Electronics, Inc.

847-843-7900 www.oeiweb.omron.com

Rockwell/Allen-

Bradley

414-382-2000 www.ab.com

Siemens

Electromechanical

Component, Inc.

770-371-3000 www.sec.siemens.com

Teledyne Relays 213-777-0077 www.teledynerelays.com

Relay Manufacturers

Typical Application Circuits

MAX4820

RESET

SET

CLK

DIN

DOUT

OUT1

RELAY

COIL 1

RELAY

COIL 8

OUT8

COM

PGND

0.1µF

GND

MAX4821

RESET

SET

LVL

OUT1

RELAY

COIL 1

RELAY

COIL 8

OUT8

COM

PGND

0.1µF

GND

1 2 3 4 5 6 7 8 9 10 11 12 13

MAX4820/MAX4821 1

Comments to this Manuals

No comments

Rainbow-electronics MAX4821 User Manual Page 9

Comments to this Manuals

Related products and manuals for Control panel Rainbow-electronics MAX4821