Temperature Sensor IC Provides PWM Output Signal

NEU ISENBURG, Germany, June 27, 2011 -

S-5855A Temperature Sensor with PWM Output Facilitates Overheat
Protection and Control.

The S-5855A Series is a very new and unique 1-wire PWM output
temperature sensor IC from Seiko Instruments. Developed in CMOS
technology low current consumption of only 50microA is one of its
merits. It changes the duty cycle of a frequency, preset with a
single capacitor, according to ambient temperature. The available
temperature sensitivities which have to be determined at the time
of order are -1%/°C, -2%/°C, -3%/°C and -4%/°C.The starting
temperature at which the S-5855A temperature sensor will start to
modulate its output signal is also determined at the time of order.
It may be selected from +40°C up to +80°C in 10°C increments. The
duty cycle decreases from 100% when the starting temperature is
exceeded by the predetermined percentage per degree C and this
decrease is linear against the temperature rise. The primary
application for this integrated circuit series is the
over-temperature protection of LED lighting as it finds use in flat
TV sets and computer LCD monitors. A wide range of applications can
be found wherever equipment needs protection against overheating
and the heating power can be reduced by reduction of the duty cycle
of energy supply. This also is a generally possible range of
applications where LEDs are used to make up for lamps or any other
lighting purpose. CMOS and N-ch open drain are available as output
form. The small packages SNT-4A and SOT-23-5 it comes in enable
high-density mounting

Contact:

Paul Krisam, Technical Sales Support Manager, Components
Department
Seiko Instruments GmbH, Siemensstrasse 9, 63263 Neu-Isenburg,
Germany
Tel.: +49-6102-297-143,  Fax.: +49-6102-297-50-143
Mobile: +49-172-6396-127,  eMail :
Paul.Krisam@seiko-instruments.de
Website : href="www.seiko-instruments.de/">www.seiko-instruments.de

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