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L6377D Datenblatt(PDF) 8 Page - STMicroelectronics |
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L6377D Datenblatt(HTML) 8 Page - STMicroelectronics |
8 / 16 page Input section L6377 8/16 4 Input section An Input and Asynchronous RESET, both TTL/CMOS compatible with wide voltage range and high noise immunity (thanks to a built in hysteresis) are available. 5 Over temperature protection (OVT) An on-chip Over Temperature Protection provides an excellent protection of the device in extreme conditions. Whenever the temperature - measured on a central portion of the chip- exceeds Tmax =150 °C (typical value) the device is shut off, and the DIAG output goes LOW. Normal operation is resumed as the chip temperature (normally after few seconds) falls below Tmax-Thys = 130 °C (typical value). The hysteresis avoid thats an intermittent behaviour take place. 6 Under voltage protection (UV) The supply voltage is expected to range from 8 to 35 V. In this range the device operates correctly. Below 8V the overall system has to be considered not reliable. To avoid any misfunctioning the supply voltage is continuously monitored to provide an under voltage protection. As Vs falls below Vsth-Vshys (typically 7.5 V, see fig. 4) the output power MOS is switched off and DIAG output goes LOW. Normal operation is resumed as soon as Vs exceeds Vsth. The hysteretic behaviour prevents intermittent operation at low supply voltage. |
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