ADP1655 데이터 시트보기 (PDF) - Analog Devices
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ADP1655 Datasheet PDF : 24 Pages
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ADP1655
L = FDSE0312-2R2M
COUT = 10µF
1
3
2
4
500ns/DIV
CHANNEL 1 (IL) 0.2A/DIV
CHANNEL 3 (LED_OUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.1A/DIV
CHANNEL 4 (SW) 5V/DIV
Figure 11. Inductor Current, Two LEDs Flash Mode, ILED = 400 mA, VIN = 3.6 V
100
VIN = 3.2V
90
VIN = 3.6V
VIN = 4.2V
80
70
60
50
40
30
20
10
0
10
100
1000
OUTPUT CURRENT (A)
Figure 14. Efficiency PLED/PIN, Two High Power White LEDs in Series
L = FDSE0312-2R2M
COUT = 10µF
1
2
3
4
500ns/DIV
CHANNEL 1 (IL) 0.2A/DIV
CHANNEL 3 (LED_OUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.02A/DIV CHANNEL 4 (SW) 5V/DIV
Figure 12. Inductor Current, Two LEDs Torch Mode, ILED = 40 mA, VIN = 3.6 V
100
VIN = 3.2V
90
VIN = 3.6V
VIN = 4.2V
80
70
60
50
40
30
20
10
0
10
100
1k
OUTPUT CURRENT (A)
Figure 15. Efficiency PLED/PIN, One High Power White LED
10
VIN = 3.2V
8
VIN = 3.6V
VIN = 4.2V
6
4
2
0
–2
–4
–6
–8
–10
0
100
200
300
400
500
OUTPUT CURRENT (mA)
Figure 13. LED Current Accuracy vs. Output Current
L = FDSE0312-2R2M
COUT = 10µF
1
Δ: 4µs
2
3
4
20µs/DIV
CHANNEL 1 (IBAT) 1A/DIV
CHANNEL 3 (VOUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.2A/DIV
CHANNEL 4 (TX_MASK) 5V/DIV
Figure 16. Tx Masking Response, TX_MASK = 0 V to 1.8 V,
ILED = 40 mA to 400 mA, VIN = 3.2 V
Rev. 0 | Page 9 of 24
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