ADM8843(Rev0) 데이터 시트보기 (PDF) - Analog Devices
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ADM8843 Datasheet PDF : 16 Pages
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180
–40°C
160
+25°C
+85°C
140
120
100
80
60
2.6
3.0
3.4
3.8
4.2
4.6
5.0
5.4
SUPPLY VOLTAGE (V)
Figure 9. Supply Current vs. Supply Voltage over Temperature,
Four LEDs Enabled @ 20 mA/LED
ADM8843
CTRL1/2
1
CURRENT
2
VOUT
3
CH1 2.00V BW
CH3 1.00V
CH2 160mA BW M 10.0µs CH2 –2.44mV
Figure 12. Soft Start Showing the Initial In-Rush Current and VOUT Variation,
Four LEDs @ 20 mA/LED, VCC = 3.6 V
VCC 2
VOUT 1
CH1 20.0mV BW CH2 20.0mV BW M 10.0µs CH1 –12.8mV
Figure 10. 1.5× Mode Operating Waveforms
VCC 1
VOUT 2
CH1 20.0mV BW CH2 20.0mV BW M 400ns CH2
Figure 11. 1× Mode Operating Waveforms
2.4mV
VCC 1
VOUT 2
CH1 20.0mV BW CH2 20.0mV BW M 400ns CH2
Figure 13. 2× Mode Operating Waveforms
2.4mV
90
VF = 3.6V
85
VF = 4.0V
80
VF = 4.3V
75
70
65
60
55
VF = 3.8V
50
VF = 3.2V
45
40
2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2
VCC
Figure 14. Power Efficiency vs. Supply Voltage over Li-Ion Range,
Four LEDs @ 20 mA/LED
Rev. 0 | Page 7 of 16
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