поискавой системы для электроныых деталей |
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UC2914DWTRG4 датащи(PDF) 2 Page - Texas Instruments |
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UC2914DWTRG4 датащи(HTML) 2 Page - Texas Instruments |
2 / 24 page UC2914 UC3914 SLUS425C − DECEMBER 2003 − REVISED JULY 2004 2 www.ti.com DESCRIPTION (continued) When the output current is less than the fault level, the external output transistor remains switched on. When the output current exceeds the fault level, but is less than the maximum sourcing level programmed by IMAX, the output remains switched on, and the fault timer starts to charge CT, a timing capacitor. Once CT charges to 2.5 V, the output device is turned off and CT is slowly discharged. Once CT is discharged to 0.5 V, the device performs a retry and the output transistor is switched on again. The UC3914 offers two distinct reset modes. In one mode with LR left floating or held low, the device tries to reset itself repeatedly if a fault occurs as described above. In the second mode with LR held high, once a fault occurs, the output is latched off until either LR is toggled low, the part is shutdown then re−enabled using SD, or the power to the part is turned off and then on again. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted.(1)(2) UC2914 UC3914 UNIT Input supply voltage VCC 40 Maximum forced voltage SD, LR 12 V Maximum forced voltage IMAX VCC V Maximum current FAULT 20 mA Maximum current PLIM 10 mA Maximum voltage FAULT 40 V Reference output current internally limited A Storage temperature range, Tstg −65 to 150 Junction temperature range, TJ −55 to 150 °C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 300 C (1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to Absolute Maximum Rated conditions for extended periods may affect device reliability (2) Currents are positive into and negative out of the specifief terminal unless otherwise noted. All voltage values are with respect to the network ground terminal. RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT Supply voltage, VCC 5 35 V Operating free-air temperature range, TA UC2914 −40 85 °C Operating free-air temperature range, TA UC3914 0 70 °C |
Аналогичный номер детали - UC2914DWTRG4 |
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Аналогичное описание - UC2914DWTRG4 |
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