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E-L9823013TR датащи(PDF) 7 Page - STMicroelectronics |
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E-L9823013TR датащи(HTML) 7 Page - STMicroelectronics |
7 / 19 page DocID7791 Rev 7 7/19 L9823 Block diagram and pins description 18 14 OUT2 Output 2 15 SFPD The Short Fault Protect Disable (SFPD) pin is used to disable the overcurrent latch-OFF. This feature allows control of incandescent loads where in-rush currents exceed the device's analog current limits. Essentially the SFPD pin determines whether the L9823 output(s) will instantly shutdown upon sensing an output short or remain ON in a current limiting mode of operation until the output short is removed or thermal shutdown is reached. If the SFPD pin is tied to VDD the L9823 output(s) will remain ON in a current limited mode of operation upon encountering a load short to supply. If the SFPD pin is grounded, a short circuit will immediately shutdown only the output affected. Other outputs not having a fault condition will operate normally. 16 VDD VDD 17 GND GND 18 GND GND 19 GND GND 20 GND GND 21 N.C. Not Connected 22 RESET The Reset pin is active low and used to clear the SPI shift register and in doing so sets all output switches OFF. With the device in a system with an MCU; upon initial system power up, the MCU holds the Reset pin of the device in a logic low state ensuring all outputs to be OFF until the VDD pin voltages are adequate for predictable operation. After the L9823 is Reset, the MCU is ready to assert system control with all output switches initially OFF. The Reset pin is active low and has an internal pull-down incorporated to ensure operational predictability should the external pull-down of the MCU open circuit. The internal pull-up is to afford safe and easy interfacing to the MCU. The Reset pin of the L9823 should be pulled to a logic low state for a duration of at least 160ns to ensure reliable Reset. 23 OUT1 Output 1 24 OUT0 Output 0 Table 2. Pins description (continued) N# Pin Description |
Аналогичный номер детали - E-L9823013TR |
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Аналогичное описание - E-L9823013TR |
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