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Ricoh launches 42V input window voltage detector to monitor overvoltage and under voltage for automotive and industrial applications

Ricoh Europe, Amstelveen, the Netherlands, 11 April, 2017 - Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre has launched the R3152, a high-accuracy window voltage detector operating at a supply vol-tage up to 42V, intended for use in a wide variety of applications, such as automotive and industrial, as well as consumer equipment. The device consists of two voltage detectors each with built-in, highly accurate hyste-resis that makes the device less sensitive to supply voltage noise and en-sures stable operation. This allows a single package to perform window, overvoltage and under voltage detection, providing a reset signal when the supply voltage exceeds an overvoltage or under voltage threshold.PR02_Ricoh_R3152_2017_18oLogos.png

Conventional voltage detectors are mostly supervising low-voltage power supplies, the power source for the voltage detector and a processor is shared. In case of a failure or slow start-up of this power source, the voltage detector will fail to operate or become unstable.

The R3152 has the significant advantage of use in a higher supply voltage environment powered directly from automotive batteries and industrial equipment, and functioning independent from the power source for the processor. This provides a more secure supervision and guarantees a pro-per reset signal. The separated power supply pin from the sense pin, make the voltage detector more flexible to monitor a voltage within the circuit.

A built-in voltage regulator stabilizes fluctuation of a car battery, even during a cranking condition. The R3152 monitors for any excessive increase or decrease of the proces-sor supply voltage with high accuracy, thus detecting an operation failure of the system at an early stage. This is especially important for safety critical automotive applications as it improves safety considerably, and useful for ASIL-B/C systems including ECU, ADAS, and control units including EV inverters and charge controllers.

The robust SOT-23-6 package and high withstand voltage of pins are es-pecially designed to prevent any damage to the chip in case short circuit occurs between adjacent pins.

Key features and benefits of the R3152N series

  • Overvoltage and undervoltage detector in one package
  • High Overvoltage and Undervoltage Detection Accuracy and High Hystere-sis Accuracy
  • Terminals with high withstand voltage and robust package helps for high reliability
  • Wide Operating Voltage range with maximum of 42V (Absolute Max. Rating 50V)
  • Independent supply voltage and sense terminal
R3152 Features:  
Operating Voltage Range (Ab-solute Max.) 3.0V to 42V (50V)
Supply Current Typ. 1.5μA
Overvoltage (OV) Detection 2.0V to 5.9V (0.01V steps)
Undervoltage (UV) Detection 1.6V to 4.8V (0.01V steps)
Detection Release Hysteresis Typ.1.0%, Max.1.5% (-40°C to 125°C)
Detection Voltage Accuracy  ± 0.5% (25°C); -1.25% to 0.75% (-40°C to 125°C)
Release Time Delay Typ. 4ms (Cd = 0.01μF)
Output Type N-channel Open Drain
Operating Temperature Range  -40°C to 105°C, -50°C to 105°C, -40°C to 125°C
resp. consumer, industrial, automotive applications
R3152 automotive versions AEC-Q100 compliant soon
Package SOT-23-6 (2.9 x 2.8 x 1.1mm)


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About Ricoh
Ricoh is a global technology company that has been transforming the way people work for more than 80 years. Under its corporate tagline – imagine. change. – Ricoh continues to empower companies and individuals with services and technologies that inspire innovation, enhance sustainability and boost business growth. These include document management sys-tems, IT services, production print solutions, visual communications sys-tems, digital cameras, and industrial systems.

Headquartered in Tokyo, Ricoh Group operates in approximately 200 countries and regions. In the financial year ending March 2016, Ricoh Group had worldwide sales of 2,209 billion yen (approx. 19.6 billion USD).

In March 2001 Ricoh Europe (Netherlands) B.V. established the Semi-conductor Support Centre to support European distributors and electronics designers and manufacturers with their applications or other enquiries about Power Management and Real Time Clock ICs.