Automotive, 125°C operation, 36V, supply voltage divided output,
window voltage detector with delay function (external setting)
The industry’s first* supply voltage divided output contributes to achieving functional safety
Supporting the achievement of functional safety
The appearance of autonomous driving have made it imperative that ECUs in automotive systems provide a variety of monitoring functions to support functional safety. S-191L/N Series...
- Has multiple voltage monitoring functions built in.
Overvoltage and undervoltage monitoring functions are built in.
It also has the industry's first* supply voltage divided output to help the microcontrollers in monitoring voltage.
No external parts are required to convert the high voltage supplied by a battery or other source to the voltage that can be input to microcontrollers.
- Needs fewer parts.
The high withstand voltage of 45V eliminates the need for the dividing resistors or switches required so far.
- Reduces standby current.
Lower current consumption because no dividing resistors are needed.
» What is Functional Safety?
Contributes to fewer parts and lower standby current
In addition to built-in supply voltage divided output, S-191L/N Series offers high withstand voltage, needs no dividing resistors and enables direct battery monitoring.
S-191L/N Series comes in an ultra-small automotive HSNT-8(2030) package and has an ultra-low current consumption of 0.9μA.
A detection voltage monitoring accuracy of ±1.5% (over the entire temperature range) helps improve voltage monitoring accuracy.
Application of negative voltage enables direct battery monitoring
The detection voltage input pin (SENSE) pin has a wide rated voltage of -30 to 45V that can handle not only high voltage but also negative voltage input.
As a result, the SENSE pin can be connected before the reverse current protection diode.
This enables the SENSE pin to cancel out the lowering of detection accuracy caused by manufacturing variations of the reverse current protection diode to further enhance the high accuracy of voltage monitoring.
And since a reverse connection protection diode is connected between the SENSE and VSS pins, it will be able to handle tests for reverse battery connection even if it is connected before the reverse current protection diode.
Automotive battery monitoring IC product lineup
|Operation voltage range||3.0V to 36.0V|
|Undervoltage detection||4.0V to 10.0V||4.0V to 10.0V||-||4.0V to 10.0V||4.0V to 10.0V|
|Overvoltage detection||16.0V to 18.0V||-||16.0V to 18.0V||-||16.0V to 18.0V|
|Detection voltage accuracy||±1.5% (Tj = -40°C to +125°C)|
|Current consumption||0.9μA typ.||0.6μA typ.||0.6μA typ.||0.75μA typ.||0.9μA typ.|
|Supply voltage divided output||1/6, 1/8, 1/12, 1/14||-||-||1/6, 1/8, 1/12, 1/14||-|
|Automotive quality||AEC-Q100 in process
|Operation temperature range||Ta= -40°C to +125°C|