ADP8861 Analog Devices, ADP8861 Datasheet - Page 21

• 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

I
The ADP8861 provides full software programmability to facilitate
its adoption in various product architectures. The default I
address is 0101010x (x = 0 during write, x = 1 during read). There-
fore, the default write address is 0x54 and the read address is 0x55.
Note the following general behavior of registers:
•
•
•
2
C PROGRAMMING AND DIGITAL CONTROL
All registers are set to their default values during reset or
after a UVLO event.
All registers are read/write unless otherwise specified.
Unused bits are read as zero.
ST
SLAVE TO MASTER
MASTER TO SLAVE
B7
0
ST
1
OPERATION
SLAVE TO MASTER
MASTER TO SLAVE
FOR WRITE
DEVICE ID
0
B7
0
1
1
0
OPERATION
FOR WRITE
0
DEVICE ID
1
1
0
R/W
B0
0
ACK
1
SELECT REGISTER TO WRITE
B7
0
REGISTER ADDRESS
R/W
B0
ACK
B7
Figure 43. I
Figure 42. I
SELECT REGISTER TO WRITE
REGISTER ADDRESS
2
B0
C
Rev. A | Page 21 of 40
2
2
ACK
C Write Command Sequence
C Read Command Sequence
RS 0
B7
1
Table 7 through Table 55 provide register and bit descriptions.
The reset value for all bits in the bit map tables is all 0s, except
in Table 9 (see Table 9 for its unique reset value). Wherever the
acronym N/A appears in the tables, it means not applicable.
OPERATION
FOR READ
DEVICE ID
0
B0
1
ACK
0
1
B7
0
8-BIT VALUE TO WRITE IN THE
R/W
B0
ADDRESSED REGISTER
REGISTER VALUE
ACK
8-BIT VALUE TO WRITE IN THE
B7
ADDRESSED REGISTER
REGISTER VALUE
B0
ACK
B0
ST
ACK
ADP8861
ST