ADP8866 Analog Devices, ADP8866 Datasheet - Page 26

• Manufacturer Part Number: ADP8866
• Description: Charge Pump Driven 9-Channel LED Driver with Automated LED Lighting Effects
• Manufacturer: Analog Devices

Specifications of ADP8866

• Vin Range: 2.5 to 5.5V
• Vout (v): 4.3 to 5.5
• Synchronous: No
• Package: 20-Lead LFCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: Yes
• Max Iout (ma): 25mA
• Brightness Control: I2C
• Peak Efficiency (%): 92%
• Switching Frequency: 1MHz

ADP8866
Bit Name
D2OFFINT
D1OFFINT
Charge Pump Gain Selection (GAIN_SEL)—Register 0x06
Table 20. GAIN_SEL Bit Map
Bit 7
Table 21.
Bit Name
N/A
1.5X_LIMIT
G_FORCE
Output Level Selection 1 (LVL_SEL1)—Register 0x07
Table 22. LVL_SEL1 Bit Map
Bit 7
Table 23.
Bit Name
N/A
D9LVL
LEVEL_SET
Reserved
Bit 6
Bit No.
7
6
[5:0]
Bit No.
1
0
Bit No.
7:3
2
[1:0]
Bit 6
D9LVL
Bit 5
Reserved
Description
Reserved.
Diode 9 level select.
1 = control with the LEVEL_SET bits.
0 = normal mode (25 mA full-scale current).
Output level selection. Sets the mode of operation for all DxLVL bits that are set high.
Code
000000
000001
000010
000011
…
111110
111111
Bit 5
Description
Include Diode 2 in the ISCOFF_INT flag.
1 = Diode 2 is in the group that triggers an ISCOFF_INT. When Diode 2 and all other LEDs with
DxOFFINT are set high and goes from on to off, ISCOFF_INT is set.
0 = Diode 2 is not in the group that triggers an ISCOFF_INT when all diodes in that group are off.
Include Diode 1 in the ISCOFF_INT flag.
1 = Diode 1 is in the group that triggers an ISCOFF_INT. When Diode 1 and all other LEDs with
DxOFFINT are set high and goes from on to off, ISCOFF_INT is set.
0 = Diode 1 is not in the group that triggers an ISCOFF_INT when all diodes in that group are off.
Description
Reserved.
1 = gain is allowed to transition up from 1× to 1.5×. The gain is never allowed to enter 2× mode.
0 = gain is allowed to transition up from 1× to 1.5× to 2× as needed.
Selects desired gain state.
00 = auto gain select.
01 = gain is locked into 1× mode.
10 = gain is locked into 1.5× mode.
11 = gain is locked into 2× mode (if 1.5X_LIMIT = 1, gain is locked into 1.5×)
N
0.8
0.9
1.0
1.1
…
7.0
1.0
Bit 4
Bit 4
Maximum Current Range
25 mA ÷ N = 31.3 mA
25 mA ÷ N = 27.8 mA
25 mA ÷ N = 25.0 mA
25 mA ÷ N = 22.7 mA
…
25 mA ÷ N = 3.6 mA
PWM current. In this mode, the INT pin functions as a PWM input and directly drives
the selected outputs.
Rev. 0 | Page 26 of 52
Bit 3
Bit 3
LEVEL_SET
Bit 2
Bit 2
1.5X_LIMIT
Bit 1
Bit 1
G_FORCE
Bit 0
Bit 0