VNH7040AY datasheet(31/48 Pages) STMICROELECTRONICS

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VNH7040AY

MultiSense operation

5.2

Multisense diagnostics flag in fault conditions

Multisense pin delivers fixed voltage (VSENSEH) with a certain current capability in case of



Fault condition on activated high-side (in ON state) triggered by Power Limitation,

overtemperature protection, where MultiSense output is selected by SEL0 to high-side

in fault state.



Fault condition on activated low-side (in ON state) triggered by overcurrent shutdown,

overtemperature protection, where MultiSense output is selected by SEL0 to the same

leg (of high-side) where low-side is in fault state.



Short-circuit to VCC on OUT in OFF state (INA = INB = PWM = 0) selected by SEL0;

Special care must be taken for the OUTB (SEL0 = 0) because the fixed voltage is

available only before device enters its stand-by mode after TD_STDBY (because all

control signals are set to 0).



In the configuration of half bridge (load connected between OUT and ground), when

open-load appears on OUT in OFF state (selected by SEL0) with activated external

pull-up resistor. Such condition causes an effect similar to the short circuit to VCC on

leg in OFF state (as mentioned in above case, output voltage exceeds open-load

threshold VOL).

VNH7040AY Datasheet(PDF) 31 Page - STMicroelectronics