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VOUT
BOOST
PASS
OFF
STROBE
ILED1
ILED2
M1,M0=‘01’
LED1,LED2=‘11’
STROBE EN=‘1’
M1,M0=‘01’
LED1,LED2=‘10’
STROBE EN=‘1’
M1,M0=‘00’
LED1,LED2=‘10’
STROBE EN=‘1’
Fig 47 IR Mode with Boost
VOUT
STROBE
ILED1
ILED2
M1,M0=‘01’
LED1,LED2=‘11’
STROBE EN=‘1’
M1,M0=‘01’
LED1,LED2=‘10’
STROBE EN=‘1’
M1,M0=‘00’
LED1,LED2=‘10’
STROBE EN=‘1’
Fig 48 IR Mode Pass Only
VOUT
STROBE
ILED1
ILED2
M1,M0=‘01’
LED1,LED2=‘11’
STROBE EN=‘1’
Flash Timeout Value
Timeout
Start
Timeout
Reset
Timeout
Start
Timeout
Reset
Timeout
Start
Timeout Reached
VOUT goes low，
LED1 &LED2 turn off
Fig 49 IR Mode Timeout
SOFT START-UP
Turn on of the AW3643 Torch and Flash modes can be done through the Enable Register. On start-up, when
V
OUT
is less than V
IN
the internal synchronous PMOS turns on as a current source and delivers 200mA (typical)
to the output capacitor. During this time the current source (LED) is off. When the voltage across the output
