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AS3643 Datasheet(PDF) 6 Page - ams AG

Part # AS3643
Description  1300mA High Current LED Flash Driver
PDF  34 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3643 Datasheet(HTML) 6 Page - ams AG

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www.austriamicrosystems.com/AS3643
1.5-4
5 - 33
AS3643
Datasheet, Confidential - E l e c t r i c a l C h a r a c t e r i s t i c s
VVOUTMAX
VVOUT overvoltage
protection
DCDC Converter Overvoltage Protection
5.0
5.3
5.6
V
ILIMIT
Current Limit for coil
LDCDC (Pin SW)
measured at 40%
PWM duty cycle
3
maximum 40000s
lifetime operation in
overcurrent limit
coil_peak=00b
1.0
A
coil_peak=01b
1.5
default value
coil_peak=10b
1.8
2.0
2.23
coil_peak=11b
2.5
VLEDSHORT
Flash LED short
circuit detection
voltage
Voltage measured between pins VOUT1,2 and
LED_OUT1,2
1.0
V
TOVTEMP
Overtemperature
Protection
Junction temperature
144
ºC
TOVTEMPHY
ST
Overtemperature
Hysteresis
5ºC
tFLASHTIMEO
UT
Flash Timeout Timer
Can be adjusted with register
flash_timeout (page 24)
2
1280
ms
accuracy
-7.5
+7.5
%
VUVLO
Undervoltage Lockout
Falling VVIN
2.25
2.4
2.5
V
Rising VVIN
VUVLO
+0.05
VUVLO
+0.1
VUVLO
+0.15
V
Digital Interface
VIH
High Level Input
Voltage
Pins SCL, SDA.
Pin TXMASK/TORCH in external torch mode
(ext_torch_on=10)
1.26
VVIN
V
VIL
Low Level Input
Voltage
0.0
0.54
V
VIHFLASH
High Level Input
Voltage
Pin STROBE.
Pin TXMASK/TORCH for TxMask mode
(ext_torch_on=01)
4
0.7
VVIN
V
VILFLASH
Low Level Input
Voltage
0.0
0.54
V
VOL
Low Level Output
Voltage
pin SDA, IOL=3mA
0.3
V
ILEAK
Leakage current
Pins SCL, SDA
-1.0
0.0
+1.0
µA
IPD
Pulldown current to
GND
5
Pins TORCH, STROBE and TXMASK/TORCH
36
µA
tDEBTORCH
TORCH debounce
time
6.3
9
11.7
ms
tTIMEOUT
SCL timeout
In indicator, assist or flash mode, if SCL is low
longer than this timeout, the AS3643
automatically enters shutdown mode
35
100
ms
I
2C mode timings - see Figure 3 on page 7
fSCLK
SCL Clock Frequency
1/
tTIMEO
UT
400
kHz
tBUF
Bus Free Time
Between a STOP and
START Condition
1.3
µs
tHD:STA
Hold Time (Repeated)
START Condition
6
0.6
µs
Table 4. Electrical Characteristics (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Unit



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