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AS3647/47B
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n
Figure 22. Low Voltage current Reduction Waveform with diagnostic-Flash and Main-Flash Phase
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If the diagnostic flash should be short (e.g. 10ms) it is recommended to operate this diagnostic flash at slightly higher
vin_low_v_run setting compared to the main flash as shown in Figure 23 :
Figure 23. Low Voltage current Reduction Waveform with short diagnostic-Flash and Main-Flash Phase
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the I C command (see Figure 24) :
The different settings for vin_low_v_run allow a constant main flash current without dropping VIN below vin_low_v_run .
Flash Strobe Timings
The flash timing are defined as follows:
1. Flash duration defined by register flash_timeout and flash is started immediately when this mode is selected by
2
set strobe_on = 0, start the flash by setting out_on = 1
2. Flash duration defined by register flash_timeout and flash started with a rising edge on pin STROBE (see Fig-
ure 25) :
set strobe_on = 1 and strobe_type = 0
3. Flash start and timing defined by the pin STROBE; the flash duration is limited by the timeout timer defined by
flash_timeout (see Figure 26 and Figure 34 ):
set strobe_on = 1 and strobe_type = 1
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