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AS3649 Datasheet(PDF) 9 Page - ams AG

Part # AS3649
Description  2500mA High Current LED Flash Driver
PDF  39 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3649 Datasheet(HTML) 9 Page - ams AG

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AS3649
Datasheet - Ty pical Operating Characteristics
7 Typical Operating Characteristics
VVIN = 3.7V, TA = +25ºC (unless otherwise specified)
Figure 4. DCDC Efficiency vs. VVIN
Figure 5. Application Efficiency (PLED/PVIN) vs. VVIN
60
65
70
75
80
85
90
95
100
2.83.0
3.2
3.4
3.63.8
4.04.2
4.4
Input Voltage (V)
ILED = 2500mA, VFLED=3.55V (2 LEDs)
ILED = 2000mA, VFLED=3.45V (2 LEDs)
ILED = 1600mA, VFLED=3.7V (1 LED)
ILED = 1600mA / dcdc_skip_enable=0
ILED = 1000mA, VFLED=3.45V (1 LED)
60
65
70
75
80
85
90
2.83.0
3.2
3.4
3.63.8
4.04.2
4.4
Input Voltage (V)
ILED = 2500mA, VFLED=3.55V (2 LEDs)
ILED = 2000mA, VFLED=3.45V (2 LEDs)
ILED = 1600mA, VFLED=3.7V (1 LED)
ILED = 1600mA / dcdc_skip_enable=0
ILED = 1000mA, VFLED=3.45V (1 LED)
Figure 6. Battery Current vs. VVIN
Figure 7. Efficiency at low currents (298mA/100mA)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2.83.0
3.2
3.4
3.63.8
4.04.2
4.4
Input Voltage (V)
ILED = 2500mA, VFLED=3.55V (2 LEDs)
ILED = 2000mA, VFLED=3.45V (2 LEDs)
ILED = 1600mA, VFLED=3.7V (1 LED)
ILED = 1600mA / dcdc_skip_enable=0
ILED = 1000mA, VFLED=3.45V (1 LED)
limited by 3.7A
peak current setting
50
55
60
65
70
75
80
85
90
2.83.0
3.2
3.4
3.63.8
4.04.2
4.4
Input Voltage (V)
ILED = 298mA/1LED DCDC Efficiency
ILED = 298mA/1LED Application Efficiency
ILED = 100mA x 2 LEDs DCDC Efficiency
ILED = 100mA x 2 LEDs Application Efficiency
Figure 8. ILED Startup (ILED_OUT=1.0A)
Figure 9. IVIN, ILED Startup (ILED_OUT=800mA)



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