ADP1655 Ver la hoja de datos (PDF) - Analog Devices
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ADP1655 Datasheet PDF : 24 Pages
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ADP1655
TYPICAL PERFORMANCE CHARACTERISTICS
600
500
400
300
200
100
ILIMIT – 2.00A
ILIMIT – 1.75A
ILIMIT – 1.50A
ILIMIT – 1.25A
0
2.7
3.2
3.7
4.2
4.7
5.2
INPUT VOLTAGE (V)
Figure 5. Maximum Current vs. Input Voltage, One LED
450
400
350
300
250
200
150
100
ILIMIT – 2.00A
50
ILIMIT – 1.75A
ILIMIT – 1.50A
ILIMIT – 1.25A
0
2.7
3.2
3.7
4.2
4.7
5.2
INPUT VOLTAGE (V)
Figure 6. Maximum Current vs. Input Voltage, Two LEDs;
LED Forward Voltage (Vf) = 4.3 V for each LED
L = FDSE0312-2R2M
COUT = 10µF
Δ: 335µs
L = FDSE0312-2R2M
COUT = 10µF
Δ: 335µs
1
2
3
4
50µs/DIV
CHANNEL 1 (IL) 0.5A/DIV
CHANNEL 3 (VOUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.2A/DIV
CHANNEL 4 (STROBE) 5V/DIV
Figure 8. Startup, Two LEDs Flash Mode, ILED = 400 mA, VIN = 3.6 V
L = FDSE0312-2R2M
COUT = 10µF
Δ: 180µs
1
2
3
4
50µs/DIV
CHANNEL 1 (IL) 0.5A/DIV
CHANNEL 3 (VOUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.2A/DIV
CHANNEL 4 (SCL) 5V/DIV
Figure 9. Startup, Two LEDs Assist Light Mode, ILED = 40 mA, VIN = 3.2 V
L = FDSE0312-2R2M
COUT = 10µF
Δ: 180µs
1
1
2
2
3
4
50µs/DIV
CHANNEL 1 (IL) 0.5A/DIV
CHANNEL 3 (VOUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.2A/DIV
CHANNEL 4 (STROBE) 5V/DIV
Figure 7. Startup, Two LEDs Flash Mode, ILED = 400 mA, VIN = 3.2 V
3
4
50µs/DIV
CHANNEL 1 (IL) 0.5A/DIV
CHANNEL 3 (VOUT) 5V/DIV
CHANNEL 2 (IHPLED) 0.2A/DIV
CHANNEL 4 (SCL) 5V/DIV
Figure 10. Startup, Two LEDs Torch Mode, ILED = 40 mA, VIN = 3.6 V
Rev. 0 | Page 8 of 24
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