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NJU7295F1-B-T Datasheet(PDF) 6 Page - New Japan Radio |
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NJU7295F1-B-T Datasheet(HTML) 6 Page - New Japan Radio |
6 / 10 page NJU7295 - 6 - Ver.2015-11-11 ■ TYPICALAPPLICATION R1, R2: Adjust the detection voltage by resistor divider R3: Setting the hysteresis voltage CIN: To prevent malfunction due to noise (Recommend about 10pF to 1000pF) EXT: The input logic signals from other power line ● Adjusting of Detection Voltage The Detection voltage of NJU7295 is fixed as 1.0V (typ.) internally, although it can be adjusted to a desired Detection Voltage by connecting external resistor (R1,R2) to a VIN pin. When adjusting to a desired Detection Voltage, it's necessary to consider VIN pin resistance RIN. (20 MΩ typ.) ● Setting of Hysteresis Voltage The NJU7295 doesn't have the Hysteresis Voltage between the Release Voltage and Detecting Voltage in default. It's able to set the Hysteresis Voltage optionally by connecting dividing resistor between the VIN-HYS pin. Detection Voltage Hysteresis Voltage = Release Voltage = Detection Voltage - Hysteresis Voltage ● External input Pin If inputs the logic signal from other power line(e.g. other NJU7295) into the EXT pin, it can be kept the status of the output "High level" and ignoring the status of detection voltage VDET. When inputs a low level signal into the EXT pin, VOUT is kept high level. It is useful for priority setting of reset signal when monitoring multiplex power supply systems. If do not use the External input, the EXT pin should be connected to VDDor Open. VDD R R 3 1 VDET R R VDET R RIN RIN R R VDET 3 1 2 ) 2 ( 1 |
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