ADP8866 Analog Devices, ADP8866 Datasheet - Page 43

• 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

Heartbeat Enable Selection (HB_SEL)—Register 0x2C
Table 76. HB_SEL Bit Map
Bit 7
Table 77.
Bit Name
N/A
D9HB_EN
D8HB_EN
D7HB_EN
D6HB_EN
Independent Sink Current LED6—Even Heartbeat Pulses (ISC6_HB)—Register 0x2D
Table 78. ISC6_HB Bit Map
Bit 7
Reserved
Table 79.
Bit Name
N/A
SCD6_HB
Independent Sink Current LED7—Even Heartbeat Pulses (ISC7_HB)—Register 0x2E
Table 80. ISC7_HB Bit Map
Bit 7
Reserved
Bit No.
7
[6:0]
Bit No.
[7:4]
3
2
1
0
Bit 6
Description
Reserved.
Sink current for the even numbered pulses when heartbeat mode for this channel is enabled. Use the following DAC code schedule.
See Table 39 for a complete list of values.
DAC
Code
0x00
0x01
0x02
0x03
…
0x7F
Description
Reserved.
Diode 9 heartbeat enable.
1 = heartbeat for this channel is enabled (all HB registers apply to every even numbered pulse).
0 = heartbeat for this channel is disabled (all HB registers are ignored).
Diode 8 heartbeat enable.
1 = heartbeat for this channel is enabled (all HB registers apply to every even numbered pulse).
0 = heartbeat for this channel is disabled (all HB registers are ignored).
Diode 7 heartbeat enable.
1 = heartbeat for this channel is enabled (all HB registers apply to every even numbered pulse).
0 = heartbeat for this channel is disabled (all HB registers are ignored).
Diode 6 heartbeat enable.
1 = heartbeat for this channel is enabled (all HB registers apply to every even numbered pulse).
0 = heartbeat for this channel is disabled (all HB registers are ignored).
Bit 6
Bit 6
Current (mA)
(Full Scale =
25 mA)
LEVEL_SET =
000010
0.0
0.0016
0.0062
0.014
…
25.0
Reserved
Bit 5
Bit 5
Bit 5
Current (mA)
(Full Scale =
12.5 mA)
LEVEL_SET =
001100
0.0
0.0008
0.0031
0.0070
…
12.5
Bit 4
Bit 4
Bit 4
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Bit 3
D9HB_EN
Current (mA)
(Full Scale =
8.25 mA)
LEVEL_SET =
010110
0.0
0.0005
0.0021
0.0047
…
8.33
Bit 3
Bit 3
SCD6_HB
SCD7_HB
Bit 2
D8HB_EN
Bit 2
Bit 2
Current (mA)
(Full Scale =
6.25 mA)
LEVEL_SET =
100000
0.0
0.0004
0.0016
0.0035
…
6.25
Bit 1
D7HB_EN
Bit 1
Bit 1
Current (mA)
(Full Scale =
5.0 mA)
LEVEL_SET =
101010
0.0
0.0003
0.0012
0.0028
…
5.0
ADP8866
Bit 0
D6HB_EN
Bit 0
Bit 0