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AS3630 датащи(PDF) 35 Page - ams AG |
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AS3630 датащи(HTML) 35 Page - ams AG |
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35 / 72 page ![]() 8A Supercap Flash Driver AS3630 – 35 Figure AS3630 – 32: AS3630 Torch Operation with Duration Synchronized to STROBE Input Protection, Status, NTC and Fault Detection Supercap End of Charge Detection - status_eoc Charging of the Supercap is performed as described in Figure 20. Once charging is finished the register status_eoc is set. ADC End of Conversion - status_adc_eoc Once the ADC conversion is finished, status_eoc is set - see “ADC” on page 38. Short/Open LED Protection - fault_led After the startup of the LED_OUT current source, the voltage on LED_OUT is continuously monitored and compared against VLEDSHORT after the LED current has reached a minimum current depending on led_current_range (see page 47) - see the figure below: Figure AS3630 – 33: Short LED Detection Minimum Current If the voltage on LED_OUT stays below VLEDSHORT, a shorted LED is detected. led_current_range Short LED Detected Above 00 (10-2500mA range) >29.4mA 01 (10-250mA range) >20.58mA 10 (3000mA range) >23.53mA 11 (4000mA range) Disabled ! |
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