AS3645 austriamicrosystems, AS3645 Datasheet - Page 4

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

AS3645
Datasheet - 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
6 Electrical Characteristics
V
+25ºC, unless otherwise specified.
Table 3. Electrical Characteristics
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General Operating Conditions
DCDC Step Up Converter
Current Sources
parallel interface mode with adjustable output currents using R
AS3645B only
V
V
I
VIN
I
SHUTDOWN
I
VINREDUCE
LED_OUT
I
I
I
ILED_COMP
I
IND_OUT
I
Symbol
I
LED_OUT
LED_OUT
LED_OUT
LED_DET
D_FUNC
IND_OUT
V
STANBY
RIPPLE
R
T
RAMP
V
f
= +2.7V to +5.5V, T
VOUT
Eta
CLK
AMB
ISET
VIN
Δ
Δ
Operating Frequency
LED_OUT ramp time
DCDC Boost output
Voltage (pin VOUT)
Shutdown Current
LED_OUT current
LED_OUT current
LED_OUT current
LED_OUT current
IND_OUT current
IND_OUT current
source accuracy
Single/Dual LED
source accuracy
Standby Current
External resistor
Supply Voltage
Supply Voltage
source voltage
source output
Temperature
compliance
Parameter
Operating
Efficiency
Detection
source
ripple
AMB
= -30ºC to +85ºC, unless otherwise specified. Typical values are at V
I
LED_OUT for operation of the current source
LED_OUT
mode with fixed current settings (pin I2C/EN
current are identical to the parallel interface
Current used for single/dual LED detection
between 1.3V and 2.4V (e.g. use red LED)
V
Using the typical resistor R
Minimum voltage between pin VOUT and
Dual LED operation, I
interface mode with fixed output currents
parallel interface mode,TORCH=L, SCL/
Ramp-down after AS3645 is disabled by
I
AS3645 functionally working, but not all
All internal timings are derived from this
VIN
LED_OUT
I
2
C mode, interface active, TORCH=L,
EN1=L, SDA/EN2=L, V
> 2.7V, indicator LED forward voltage
Single or Dual LED operation
<320mA or using external current set
Ramp-up During startup
>=320mA, I
Single LED operation
400mA, V
Dual LED operation
parameters fulfilled
I
LED_OUT
Revision 1.6
tied to ground)
resistor R
Condition
V
oscillator
interface
VIN
<3.7V
VOUT
= 320mA
2
LED_OUT
C mode or parallel
ISET
=7.2V
ISET
ISET
VIN
=300mA to
<3.7V
(26kΩ) all
current setting
-7.5%
20.0
20.0
Min
-30
-10
-20
2.7
2.5
2.8
0.6
0.2
2.5
2x
20
-5
(see page 13)
Typ
300
3.6
0.5
0.5
2.0
25
85
10
80
26
VIN
= +3.6V, T
+7.5%
2x500
Max
1.25
46.2
720
+10
350
+20
4.8
2.7
1.0
8.6
0.7
10
85
+5
10
mA
MHz
AMB
Unit
mA
mA
mV
mA
mA
ms
ms
µA
µA
kΩ
ºC
4 - 33
%
%
%
%
V
V
V
PP
=