ADP1655-EVALZ Analog Devices Inc, ADP1655-EVALZ Datasheet - Page 8

• Manufacturer Part Number: ADP1655-EVALZ
• Description: Dual LED Flash Driver Eval. Board
• Manufacturer: Analog Devices Inc

Specifications of ADP1655-EVALZ

• Core Chip: ADP1655
• Topology: Boost
• No. Of Outputs: 2
• Dimming Control Type: PWM
• Tool / Board Applications: Analog/Mixed Signal-Clock, Timer
• Supported Devices: AD9552
• Msl: MSL 1 - Unlimited
• Current - Output / Channel: 500mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 4.9V
• Features: Camera Flash and Torch Modes, I²C Interface, Programmable Output Current
• Voltage - Input: 2.7 ~ 5.5 V
• Utilized Ic / Part: ADP1655
• Development Tool Type: Hardware - Eval/Demo Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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