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TPS22981RGPR 데이터시트(PDF) 12 Page - Texas Instruments |
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TPS22981RGPR 데이터시트(HTML) 12 Page - Texas Instruments |
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12 / 27 page ![]() Load Current Output Voltage t OC Limit tLIM delay EN HV_EN V3P3 VHV OUT 3.3V VHV Hi-Z Hi-Z 3.3V Hi-Z IDIS 0mA IDIS TPS22981 SLVSBM6B – DECEMBER 2012 – REVISED NOVEMBER 2015 www.ti.com Figure 6 shows possible combinations of EN and HV_EN controlling OUT of the TPS22981. Figure 6. Logic Waveforms Displaying the Transition Between VHV and V3P3 7.3.6 Overcurrent Limit and Short-Circuit Protection When the load at OUT attempts to draw more current than the limit set by the external RSET resistors for the V3P3 switch and VHV switch (for both S0 and S3 modes), the device will operate in a constant-current mode while lowering the output voltage. Figure 7 shows the delay, tLIM, which occurs from the instance an overcurrent fault is detected until the output current is lowered to ILIMHV tolerances for VHV or ILIM3V3 tolerances for V3P3 shown in Figure 3. Figure 8 shows the response time versus a resistance shorted across the output. Figure 7. Overcurrent Output Response 12 Submit Documentation Feedback Copyright © 2012–2015, Texas Instruments Incorporated Product Folder Links: TPS22981 |
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