Datasheet

Data Sheet 18 Rev. 1.2, 2010-11-26
TLE42694
Block Description and Electrical Characteristics
Reset Adjust Function
The undervoltage reset switching threshold can be adjusted a
ccording to the application’s needs by connecting
an external voltage divider (
R
ADJ1
, R
ADJ2
) at pin RADJ. For selecting the default threshold connect pin RADJ to
GND.
When dimensioning the voltage
divider, take into consideration that there will be an additional current constantly
flowing through the resistors.
With a voltage divider connected, the reset switching threshold
V
RT,new
is calculated as follows:
V
RT new,
R
ADJ 1,
R+
ADJ 2,
R
ADJ 2,
------------------------------------------
V
RADJ th,
×=
with
•
V
RT,new
: the desired new reset switching threshold
•
R
ADJ1
, R
ADJ2
: resistors of the external voltage divider
•
V
RADJ,th
: reset adjust switching threshold given in Table “Electrical Characteristics Reset Function” on
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