Datasheet

Application information VND5E006ASP-E
26/37 DocID17362 Rev 6
3.3.1 Short to V
CC
and off-state open-load detection
Short to V
CC
A short circuit between V
CC
and output is indicated by the relevant current sense pin set to
V
SENSEH
during the device off-state. Small or no current is delivered by the current sense
during the on-state depending on the nature of the short circuit.
Off-state open-load with external circuitry
Detection of an open-load in off mode requires an external pull-up resistor R
PU
connecting
the output to a positive supply voltage V
PU
.
It is preferable V
PU
to be switched off during the module standby mode in order to avoid the
overall standby current consumption to increase in normal conditions, i.e. when load is
connected.
For proper open-load detection in off-state, the external pull-up resistor must be selected
according to the following formula:
For the values of V
OLmin
,V
OLmax
, and I
L(off2)
see Table 10: Open-load detection
(8 V < VCC < 18 V).
VV
RR
IRRVR
V
OL
PDPU
offLPDPUPUPD
ONupPull
OUT
4
max
)2(
_
=>
+
⋅⋅−⋅
=
−