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VNF9D5F Datasheet(PDF) 19 Page - STMicroelectronics |
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VNF9D5F Datasheet(HTML) 19 Page - STMicroelectronics |
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19 / 108 page  Figure 11. I²t counter with varying INOM latch and unlatch Inom Counter Max Unlatch by SPI or DIN SOCRx, DINx I²t latch IOUT I²t counter The last (13th) step of the I²t protection staircase curve is equal to 10 * INOM. Whenever the load current exceeds the 13th threshold, the output channel is latched off immediately within tdoff + tf, protecting the integrity of the board net power supply. The I²t block is supplied from an internal voltage regulator supplied by VREG. Therefore, as soon as VREG drops below VREG_POR_L, the accumulated I²t counter value is reset and the device enters in sleep mode. Figure 12. I²t counter after POR with IOUT > INOM I²t counter COUNTER MAX SOCRx, DINx IOUT I²t latch INOM Auto restart Auto restart t t t t VNF9D5F Protections DS13946 - Rev 8 page 19/108 |
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