AS3645 austriamicrosystems, AS3645 Datasheet - Page 13

• Manufacturer Part Number: AS3645
• Description: 1000/720ma Ultra Small High Efficient Single/dual Led Flash Driver With Safety Features
• Manufacturer: austriamicrosystems

AS3645
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 18. Single/Dual LED detection
The detection can be disabled in I
led_amount
In parallel interface mode, the pin STROBE is used as an open drain output to indicate if a single or a dual LED was
detected: STROBE=L indicates single LED, STROBE=H (open drain) indicates dual LED detected.
Note: When using boost_current=1, always set led_det_on=0 and led_amount=0 to disable the single/dual LED
Interface Mode: parallel interface mode with fixed output currents
The output currents and operating mode in parallel interface mode with fixed output currents are selected according to
the following table
Table 4. parallel interface mode with fixed output currents
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SCL/EN1 SDA/EN2 TORCH
7. The mode is selected by tying I2C/EN to ground
0
0
0
1
1
detection.
default value (‘1’ for dual LED) is used. This bit can be overwritten by software in I
0
0
1
0
1
7
:
0
1
X
X
X
2
STROBE
C mode by clearing the bit
detected
detected
L=single
L=single
H=dual
H=dual
LED
LED
X
X
external torch mode
(with 850ms flash
assist light mode
indicator mode
Device Mode
flash mode
shutdown
timeout)
Revision 1.6
led_det_on (see page
500mA single LED
80mA single LED
80mA single LED
320mA dual LED
40mA dual LED
40mA dual LED
output current
LED_OUT
0
0
21). If disabled, the bit
2
C mode.
output current
IND_OUT
2.5mA
0
0
0
0
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