MLX90721SL-X 查看數據表（PDF） - Melexis Microelectronic Systems
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MLX90721SL-X Datasheet PDF : 11 Pages
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MLX90721
Auto Shut Off Timer
Features and Benefits
Low cost – minimal external components
Small package (to92 for the 3 pins version,
pdip8, psop8 or cob for the 4 pins version)
On chip calibrated timer
Drives different relay types, including low
cost 12V relays and most custom made
relays.
Low power consumption (low dissipation)
Applications
Household appliances
Heater
Hand-dryer
Ordering Information
Part No.
MLX90721
MLX90721
MLX90721
Temperature Suffix
S
S
S
Package
TA
A
L
option
-x
-x
-x
Temperature Range
0C to 85C
0C to 85C
0C to 85C
The customer specific option code is indicated with 1 character at the end of the ordering number.
For cob assembly, please contact Melexis directly.
Functional Diagram
90721
VDDA
Vreg
BUT
OSC
Use Template :
block.lovsgtic
POR
OUT
options
VSS
Description
The chip is intended to be used for switching on and
off a mains powered device, with the added feature
of automatic switch off after a well-defined amount of
time. Such device can replace conventional switches
in all appliances that might be left on inadvertently.
Besides saving energy, the main goal is to prevent
all hazards due to appliances left on unattended.
The chip can be used in its 3-pin version, where
applying the supply to the chip does switching on.
In the 4-pin version switching on and off is done with
a single push-button.
As an alternative the fourth pin can also be used as
a reset pin, where the auto-shut-off time counter is
reset when pushing this button.
The auto-shut-off time is mask programmable and
can be almost anything between 2.5 minutes and 32
hours. The duty cycle of the relay driver can also be
adjusted by mask to adapt to almost any kind of relay
construction.
MMLLXX990027xx21NaAmuetooSf hSuetnOsofrf Timer
RePvaYg.Xe 1
22/Aug/98 Rev 1.0 2P2/aJguen1/00
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