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VNQ830M View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
VNQ830M
ST-Microelectronics
STMicroelectronics ST-Microelectronics
VNQ830M Datasheet PDF : 21 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
VNQ830M
OPEN LOAD DETECTION IN OFF STATE
Off state open load detection requires an external pull-up
resistor (RPU) connected between OUTPUT pin and a
positive supply voltage (VPU) like the +5V line used to
supply the microprocessor.
The external resistor has to be selected according to the
following requirements:
1) no false open load indication when load is connected:
in this case we have to avoid VOUT to be higher than
VOlmin; this results in the following condition
VOUT=(VPU/(RL+RPU))RL<VOlmin.
2) no misdetection when load is disconnected: in this
case the VOUT has to be higher than VOLmax; this
results in the following condition RPU<(VPU–VOLmax)/
IL(off2).
Because Is(OFF) may significantly increase if Vout is pulled
high (up to several mA), the pull-up resistor RPU should
be connected to a supply that is switched OFF when the
module is in standby.
The values of VOLmin, VOLmax and IL(off2) are available in
the Electrical Characteristics section.
Open Load detection in off state
INPUT
STATUS
V batt.
VPU
VCC
RPU
DRIVER
+
LOGIC
IL(off2)
+
R
-
OUT
VOL
RL
GROUND
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