0.27
A CURRENT CONSUMPTION VOLTAGE DETECTOR WITH DELAY FUNCTION (EXTERNAL DELAY TIME SETTING)
S-1009 Series
Rev.5.1_03
3. Change of detection voltage (Nch open-drain output product only)
If there is not a product with a specified detection voltage value in the S-1009N Series, the detection voltage can be
changed by using a resistance divider or a diode, as seen in Figure 33 and Figure 34.
In Figure 33, hysteresis width also changes.
VDD
VDD
R
Vf1
R
*1
RA
100 k
100 k
(RA 100 k)
VIN
VIN
OUT
S-1009N
OUT
S-1009N
(Nch open-drain
output product)
(Nch open-drain
ouput product)
RB
VSS
VSS
RA RB
Detection voltage = Vf1 (VDET
)
Detection voltage =
Hysteresis width =
VDET
VHYS
RB
RA RB
RB
*1. RA should be 100 k or less to prevent oscillation.
Caution If RA and RB are large, the hysteresis width
may also be larger than the value given by
the above equation due to the feed-through
current.
Figure 33
Figure 34
Caution 1. The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
2. Note that the hysteresis width may be larger as the following equation shows when using the
above connections. Perform thorough evaluation using the actual application to set the
constant.
RA RB
Maximum hysteresis width =
VHYSRA 20 A
RB
28
ABLIC [ ABLIC ]
