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TMCNet:  Seiko Instruments Launches New Automotive Voltage Detectors Capable of 125 Degree C Operation and 36V Input Voltage

[July 01, 2014]

Seiko Instruments Launches New Automotive Voltage Detectors Capable of 125 Degree C Operation and 36V Input Voltage

CHIBA, Japan --(Business Wire)--

Seiko Instruments Inc. (SII) launches new automotive voltage detectors, the S-19110 series, that are capable of 125 degree C operation and 36V input voltage while allowing for direct detection of 12V lead-acid battery voltage. Typical applications include ECUs for engines, transmissions and suspensions, Anti-lock Brake Systems, related Electric Vehicle equipment, and Hybrid Electric Vehicle and Plug-in Hybrid Electric Vehicle electronics.

Automotive ECU power supplies use 12V lead-acid batteries, and the power supply must be monitored to prevent ECU malfunctions caused by voltage fluctuations from the 12V lead-acid batteries. The new S-19110 Series' high withstand voltage feature of 36V input and maximum rating of 45V, allows for direct voltage detection from 12V lead-acid batteries, while other detectors typically require an external resistor voltage divider to accomplish this. The S-19110 Series also reduces the current consumption from approximately 100uA from an external divider to under 2uA (Figure 1). In addition, unlike other typical voltage detectors, the S-19110 series positioned the ground pin away from the power supply pin, to help prevent the possibility of a short circuit between adjacent pins (Figure 2).

The S-19110 series was specifically developed to meet the demanding high quality requirements for automotive use, and will be AEC-Q100 certified. The S-19110 series has a wide perating temperature range from -40 to 125 degrees C, low current consumption of 600nA, and a voltage detection range of 3.0V to 10.0V available in 0.05V steps which can be set internally and requires no external parts. Two types are available for voltage detection: a VDD detection type and a SENSE detection type. The SENSE detection type has a SENSE pin in addition to a VDD pin, and the added SENSE pin allows stable output even when the SENSE pin voltage drops to 0V. The S-19110 series is offered in the lead (Pb)-free/halogen-free SOT-23-6 package.

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