Ricoh Electronic Devices Company R3154N Series Voltage Detector

Ricoh Electronic Devices Company R3154N Series Voltage Detector is a high-accuracy window voltage detector optimized for use in automotive applications. The R3154N consists of two detectors for overvoltage and undervoltage monitoring, 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 verify the proper operation of the voltage detector periodically.

The 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 R3154N Voltage Detector's sense voltage and hysteresis levels enable the device to detected 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.

The Ricoh Electronic Devices Company R3154N Series Voltage Detector 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 supply current (typical)
  • 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% detection release hysteresis (typical)
  • 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

  • Power supply voltage monitoring for systems which require fault detection, such as ECU and ADAS
  • Power supply voltage monitoring for control units such as EV inverters and Charge Controllers

Block Diagram

Block Diagram - Ricoh Electronic Devices Company R3154N Series Voltage Detector

Typical Application Circuit

Application Circuit Diagram - Ricoh Electronic Devices Company R3154N Series Voltage Detector
公開: 2020-11-06 | 更新済み: 2020-11-25