ADP8861 Analog Devices, ADP8861 Datasheet - Page 9

• Manufacturer Part Number: ADP8861
• Description: Charge Pump, 7-Channel Smart LED Driver with I2C Interface
• Manufacturer: Analog Devices

Specifications of ADP8861

• Vin Range: 2.5 to 5.5V
• Vout (v): 4.3 to 5.5
• Synchronous: No
• Package: 20-Lead LFCSP,20-Lead WLCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: Yes
• Max Iout (ma): 60mA
• Brightness Control: PWM
• Peak Efficiency (%): 89%
• Switching Frequency: 1.32MHz
• Over Volt Protection (v): 5.8V

90
80
70
60
50
40
30
20
10
0
2.5
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
6.0
5.8
5.6
5.4
5.2
Figure 18. Typical Overvoltage Protection (OVP) Threshold
–40
–40
Figure 17. Typical Regulated Output Voltage (V
V
GAIN = 2×
I
I
I
OUT
OUT
OUT
IN
3.0
= 3V
Figure 19. Typical Efficiency (Low Vf Diode)
= 10mA
= 140mA, Vf = 3.1V
= 210mA, Vf = 3.2V
–10
–10
3.5
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
OVP THRESHOLD
V
20
20
IN
4.0
(V)
4.5
50
50
OVP RECOVERY
5.0
80
80
OUT(REG)
5.5
)
450
400
350
300
250
200
150
100
50
0
110
110
Rev. A | Page 9 of 40
100
90
80
70
60
50
40
30
20
10
0
2.5
1
2
3
1
2
3
C
V
I
C
V
I
OUT
OUT
IN
IN
IN
IN
I
I
Figure 22. Typical Operating Waveforms, G = 1.5×
OUT
OUT
Figure 21. Typical Operating Waveforms, G = 1×
= 3.0V
= 1µF, C
= 3.6V
= 1µF, C
3.0
= 120mA
= 120mA
Figure 20. Typical Efficiency (High Vf Diode)
= 140mA, Vf = 3.85V
= 210mA, Vf = 4.25V
OUT
OUT
V
V
V
V
3.5
OUT
I
OUT
I
IN
IN
= 1µF, C1 = 1µF, C2 = 1µF
= 1µF, C1 = 1µF, C2 = 1µF
IN
IN
(AC-COUPLED) 10mA/DIV
(AC-COUPLED) 10mA/DIV
(AC-COUPLED) 50mV/DIV
(AC-COUPLED) 50mV/DIV
(AC-COUPLED) 50mV/DIV
(AC-COUPLED) 50mV/DIV
V
IN
4.0
(V)
T
T
4.5
5.0
500ns/DIV
500ns/DIV
ADP8861
5.5
450
400
350
300
250
200
150
100
50
0