Nisshinbo R3154N Series Voltage Detector
Nisshinbo R3154N Voltage Detector is a high-accuracy window voltage detector optimized for use in automotive applications. The R3154N consists of two overvoltage and undervoltage monitoring detectors, each with built-in hysteresis that makes it less sensitive to supply voltage noise and ensures stable operation. An additional test pin enables a diagnostic method to periodically verify the voltage detector's proper operation.
Nisshinbo R3154N Voltage Detector operates at a supply voltage up to 42V. The device monitors over-and-under output voltages from the power supply IC for a microprocessor and a sensor and detects an abnormal voltage of systems. The R3154N offers undervoltage detection down to 0.55V, making it suitable for low-power devices.
The wide operating voltage range of the R3154N enables the device to be powered directly from car batteries and function independently from the power source for the processor. The R3154N also has an integrated voltage regulator, which stabilizes the voltage fluctuations of a car battery, even during a tough cranking condition.
The high accuracy of the R3154N Voltage Detector's sense voltage and hysteresis levels enable the device to detect malfunctions in an early stage. This is especially important for safety-critical applications and automotive systems requiring fault detection, including ECU, ADAS, and control units, including EV inverters and charge controllers.
Nisshinbo R3154N is offered in a compact SOT-23-6 package to minimize PCB space requirements.
Features
- 3.0V to 42.0V operating voltage range, 50.0V maximum
- 2.0µA typical supply current
- 0.75V to 3.70V overvoltage detection, in 0.01V steps
- Overvoltage accuracy
- (VOVSET >0.9V): ±0.5% (Ta = +25°C)
- -1.25% to 0.75% (-40°C to +125°C)
- 0.55V to 3.30V undervoltage detection in 0.01V steps
- Undervoltage accuracy
- (VUVSET >0.66 V): ±0.5% (Ta = +25°C)
- -1.25% to 0.75% (-40°C to +125°C)
- 0.5% typical detection release hysteresis
- 20µs detection release time
- N-channel, open-drain output
- -40°C to +125°C operating temperature range
- SOT-23-6 package (2.9mm x 2.8mm x 1.1mm)
Applications
- Automotive
- Electronic control units (ECUs)
- Advanced driver assistance systems
- EV inverters
- Charge controllers
Block Diagram
Typical Application Circuit
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