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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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ISL97801 Fiches technique(PDF) 18 Page - Renesas Technology Corp |
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ISL97801 Fiches technique(HTML) 18 Page - Renesas Technology Corp |
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18 / 20 page  ISL97801 FN6428 Rev 1.00 Page 18 of 20 April 2, 2007 Automotive Applications The LED load and ISL97801 may be protected against load dumps and other electrical faults in automotive supplies with a minor addition to the standard application schematic: • A reverse transient automotive-rated protection power schottky must be added in series with the input supply •A 500 current limit resistor must be inserted in series with the VBAT pin • The fault protection NFET must be specified to handle 100V VDS conditions. The protection circuit is applicable to buck, boost, and supply-return load applications. A small reduction in efficiency is caused by the drop in the power schottky. Unless alternative transient protection is provided, minimum BOM automotive applications must include the circuit changes noted above. Automotive Boost Application Diagram Automotive Minimum BOM Boost Application Diagram VIN FAULT VBAT VDC TEMP TMAX EN/PWM MODE LEVEL BUCK/BOOSTN VHI SWD1 SWD2 SWS1 SWS2 ENL FB GND TEMP SENSOR EN VLEVEL (0V TO 2.5V) VBAT OVP RLIM 500 FIGURE 39. AUTOMOTIVE BOOST MODE APPLICATION DIAGRAM VIN FAULT VBAT VDC TEMP TMAX EN/PWM MODE LEVEL BUCK/BOOSTN VHI SWD1 SWD2 SWS1 SWS2 ENL FB GND EN VLEVEL (0V TO 2.5V) VBAT OVP FIGURE 40. AUTOMOTIVE MINIMUM BOM BOOST MODE APPLICATION |
Numéro de pièce similaire - ISL97801 |
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Description similaire - ISL97801 |
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