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CS8182YDPS5G Fiches technique(PDF) 6 Page - ON Semiconductor |
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CS8182YDPS5G Fiches technique(HTML) 6 Page - ON Semiconductor |
6 / 12 page CS8182 http://onsemi.com 6 APPLICATION NOTES VOUT Short to Battery The CS8182 will survive a short to battery when hooked up the conventional way as shown in Figure 13. No damage to the part will occur. The part also endures a short to battery when powered by an isolated supply at a lower voltage as in Figure 14. In this case the CS8182 supply input voltage is set at 7 V when a short to battery (14 V typical) occurs on VOUT which normally runs at 5 V. The current into the device (ammeter in Figure 14) will draw additional current as displayed in Figure 15. VOUT GND GND Adj VIN GND GND VREF/ ENABLE VOUT 5.0 V 70 mA C1* 1.0 mF Automotive Battery typically 14 V Short to battery Figure 13. C2** 10 mF VOUT GND GND Adj VIN GND GND VREF/ ENABLE VOUT C1* 1.0 mF Figure 14. C2** 10 mF C3*** 10 nF VOUT = VREF 5.0 V Loads B+ 5.0 V 70 mA Automotive Battery typically 14 V Short to battery VOUT = VREF 5.0 V Loads B+ C3*** 10 nF A 7 V ** C2 is required for stability. * C1 is required if the regulator is far from the power source filter. *** C3 is recommended for EMC susceptibility. + − + − + − + − Figure 15. VOUT Short to Battery 2.0 1.8 1.6 1.4 1.2 1.0 0.6 0.4 0.2 0 6 510 15 20 25 VOUT VOLTAGE (V) 0.8 7 8 9 1112 1314 1617 1819 2122 2324 26 Switched Application The CS8182 has been designed for use in systems where the reference voltage on the VREF/ENABLE pin is continuously on. Typically, the current into the VREF/ENABLE pin will be less than 1.0 mA when the voltage on the VIN pin (usually the ignition line) has been switched out (VIN can be at high impedance or at ground.) Reference Figure 16. VOUT GND GND Adj VIN GND GND VREF/ ENABLE VOUT VREF 5.0 V VBAT C1 1.0 mF Ignition Switch < 1.0 mA Figure 16. C2 10 mF |
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