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AS3492 Folha de dados(PDF) 8 Page - ams AG

Nome de Peças AS3492
Descrição Electrónicos  Highly Efficient 2-10 LEDs Backlight Driver with 2 PWM Inputs
PDF  19 Pages
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Fabricante Electrônico  AMSCO [ams AG]
Página de início  http://www.ams.com
Logo AMSCO - ams AG

AS3492 Folha de dados(HTML) 8 Page - ams AG

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AS3492
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
VBAT = 3.7V, TA = +25ºC (unless otherwise specified).
Figure 3. DCDC Efficiency vs. VBAT
Figure 4. LED Efficiency vs. VBAT
55
60
65
70
75
80
85
90
95
2,5
2,9
3,3
3,7
4,1
4,5
4,9
5,3
%
Input Voltage (V)
VLED=7.67V, ILEDs=98mA
VLED=7.5V, ILEDs=73.5mA
VLED=7.5V, ILEDs=49mA
55
60
65
70
75
80
85
90
95
2,5
2,9
3,3
3,7
4,1
4,5
4,9
5,3
%
Input Voltage (V)
VLED=7.67V, ILEDs=98mA
VLED=7.5V, ILEDs=73.5mA
VLED=7.5V, ILEDs=49mA
Figure 5. Efficiency vs. Load Current
Figure 6. Startup with PWM, 20% duty cycle
55
60
65
70
75
80
85
90
95
0
25
50
75
100
125
ILED(s) (mA) - combined
LED Efficiency (PLED/PVIN)
DCDC Efficiency
(PDCDC/PVIN)
Figure 7. Startup with PWM, 70% duty cycle
Figure 8. DCDC Switching Waveforms



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