ADP8861 Analog Devices, ADP8861 Datasheet - Page 31

• 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

Backlight Dim Current Register (BLDM)—Register 0x0A
Table 29. BLDM Bit Map
Bit 7
Reserved
Table 30. Bit Descriptions for the BLDM Register
Bit Name
N/A
BL_DC
INDEPENDENT SINK REGISTER DESCRIPTIONS
Independent Sink Current Fade Control Register (ISCFR)—Register 0x0F
Table 31. ISCFR Bit Map
Bit 7
Table 32. Bit Descriptions for the ISCFR
Bit Name
N/A
SC_LAW
Independent Sink Current Control (ISCC)—Register 0x10
Table 33. ISCC Bit Map
Bit 7
Reserved
Table 34. Bit Descriptions for the ISCC Register
Bit Name
N/A
SC7_EN
SC6_EN
SC5_EN
Bit No.
7
[6:0]
Bit No.
[7:2]
[1:0]
Bit 6
SC7_EN
Bit 6
Bit 6
Description
Reserved.
Backlight dim current. The backlight is set to the dim current value after a dim timeout or if the DIM_EN
flag is set by the user (see Table 28 for a complete list of values).
DAC
0000000
0000001
0000010
0000011
…
1111111
Bit 5
Description
Reserved
Independent sink current fade transfer law
00 = linear law DAC, linear time steps
01 = square law DAC, linear time steps
10 = square law DAC, nonlinear time steps (Cubic 10)
11 = square law DAC, nonlinear time steps (Cubic 11)
Bit 5
SC6_EN
Bit No.
7
6
5
4
Bit 5
Reserved
Linear Law (mA)
0
0.236
0.472
0.709
…
30
Bit 4
Description
Reserved
This enable acts upon LED7
1 = SC7 is turned on
0 = SC7 is turned off
This enable acts upon LED6
1 = SC6 is turned on
0 = SC6 is turned off
This enable acts upon LED5
1 = SC5 is turned on
0 = SC5 is turned off
Bit 4
SC5_EN
Bit 4
Rev. A | Page 31 of 40
Square Law (mA)
0.000
0.002
0.007
0.017
…
30
Bit 3
Bit 3
SC4_EN
Bit 3
BL_DC
Bit 2
Bit 2
SC3_EN
Bit 2
Bit 1
Bit 1
SC2_EN
Bit 1
SC_LAW
Bit 0
ADP8861
Bit 0
SC1_EN
Bit 0