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FAN7530 데이터시트(PDF) 17 Page - Fairchild Semiconductor |
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FAN7530 데이터시트(HTML) 17 Page - Fairchild Semiconductor |
17 / 37 page © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN9611 / FAN9612 • Rev. 1.1.3 17 12. Bias Supply (VDD) This is the main bias source for the FAN9611/12. The operating voltage range is between 8V and 18V. The VDD voltage is monitored by the under-voltage lockout (UVLO) circuit. At power-up, the VDD voltage must exceed 10.0V (±0.5V) for FAN9611 and exceed 12.5V (±0.5V) for FAN9612 to enable operation. Both the FAN9611 and the FAN9612 stops operating when the VDD voltage falls below 7.5V (±0.5V). See PGND pin description for important bypass information. 13. Current-Sense Protection (CS1, CS2) The FAN9611/12 uses independent over-current protection for each of the power MOSFETs. The current-sense thresholds at the CS1 and CS2 pins are approximately 0.2V. The current measurements are strictly for protection purposes and are not part of the control algorithm. The pins can be directly connected to the non-grounded end of the current-sense resistors because the usual R-C filters of the leading-edge current spike are integrated in the IC. Figure 26. Current-Sense Protection Circuits The time constant of the internal filter is approximately: ns pF k 130 5 27 or MHz pF k P 2 . 1 5 27 2 1 (4) |
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유사한 설명 - FAN7530 |
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