AS3645 austriamicrosystems, AS3645 Datasheet - Page 14

• 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
Interface Mode: parallel interface mode with adjustable output currents - only
AS3645B
The output currents and operating mode in parallel interface mode with fixed output currents is selected according to
the following table
Table 5. parallel interface mode with fixed output currents
1. Maximum 500mA (single LED) or 320mA (dual LED) - use I
With the help of the resistor R
current is increased (and vice versa).
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SCL/EN1 SDA/EN2 TORCH
8. The parallel interface mode with adjustable output currents is selected by connecting the resistor R
0
0
0
1
1
between the pin I2C/EN and GND
0
0
1
0
1
8
:
0
1
X
X
X
ISET
, the output current can be scaled. If the resistor R
STROBE
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
2
C mode to obtain higher currents
26k Ω /R
26k Ω /R
26k Ω /R
26k Ω /R
26k Ω /R
26k Ω /R
output current
for single LED
for single LED
for single LED
for dual LED
for dual LED
for dual LED
LED_OUT
ISET
ISET
ISET
ISET
ISET
ISET
0
0
*500mA
*320mA
ISET
*80mA
*40mA
*80mA
*40mA
is smaller as 26k Ω , the output
1
(independent of R
output current
IND_OUT
2.5mA
0
0
0
0
ISET
14 - 33
ISET
)