AS3645 austriamicrosystems, AS3645 Datasheet - Page 8

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

AS3645
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
V
Figure 6. I
Figure 8. I
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Figure 4. DCDC Efficiency vs. V
VIN
95
90
85
80
75
70
65
60
55
50
= 3.6V, T
2.7
LED
LED
3.1
A
Startup (two LEDs, I
Startup (two LEDs, I
= +25ºC (unless otherwise specified)
3.5
Input Voltage (V)
100µs/Div
250µs/Div
3.9
the AS3645 DCDC waits
before rampup continues
until it is in-regulation
VIN
LED_OUT
LED_OUT
4.3
IOUT = 160mA/2LEDs
IOUT = 220mA/2 LEDs
IOUT = 320mA/2 LEDs
IOUT = 400mA/2 LEDs
4.7
=40mA)
=320mA)
5.1
Revision 1.6
Figure 9. VOUT / I
Figure 5. Application Efficiency (P
Figure 7. I
95
90
85
80
75
70
65
60
55
50
2.7
VIN
3.1
Startup (two LEDs, I
LED_OUT
3.5
Input Voltage (V)
250µs/Div
250ns/Div
ripple, I
3.9
LED
LED_OUT
LED_OUT
4.3
IOUT = 160mA/2LEDs
IOUT = 220mA/2 LEDs
IOUT = 320mA/2 LEDs
IOUT = 400mA/2 LEDs
IOUT = 500mA/ 1 LED
/P
VIN
=400mA)
4.7
) vs. V
= 320mA
VIN
5.1
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