ADP8860 Analog Devices, ADP8860 Datasheet - Page 46

• Manufacturer Part Number: ADP8860
• Description: Charge Pump, 7-Channel Smart LED Driver with I2C Interface
• Manufacturer: Analog Devices

Specifications of ADP8860

• Vin Range: 2.4V to 5.5V
• Vout (v): 4.3 to 5.5
• Synchronous: No
• Package: 20-Lead WLCSP
• Led Configuration: Parallel
• Topology: Capacitive
• I2c Support: Yes
• Max Iout (ma): 60mA
• Brightness Control: I2C
• Peak Efficiency (%): 89%
• Switching Frequency: 1MHz

ADP8860
Bit Name
L2_EN2
Comparator Level 2 Threshold (L2_TRP)—Register 0x1D
Table 68. L2_TRP Bit Map
Bit 7
Table 69. Bit Descriptions for the L2_TRP Register
Bit Name
L2_TRP
Comparator Level 2 Hysteresis (L2_HYS)—Register 0x1E
Table 70. L2_HYS Bit Map
Bit 7
Table 71. Bit Descriptions for the L2_HYS Register
Bit Name
L2_HYS
Bit No.
0
Bit 6
Bit 6
Bit No.
7:0
Bit No.
7:0
Description
Note that the L3 comparator has priority over L2.
1 = the L2 comparator is enabled for the CMP_IN2 comparator.
0 = the L2 comparator is disabled for the CMP_IN2 comparator.
Bit 5
Description
Comparator Level 2 threshold. If the comparator input is below L2_TRP, then the comparator trips and
the backlight enters Level 2 (office) mode. The following lists the code settings for photosensor current:
00000000 = 0 μA.
00000001 = 4.3 μA.
00000010 = 8.6 μA.
00000011 = 12.9 μA.
…
11111010 = 1080 μA.
…
11111111 = 1106 μA.
Although codes above 1111010 (250) are possible, they should not be used. Furthermore, the maximum
value of L2_TRP + L2_HYS must not exceed 1111010 (250).
Bit 5
Description
Comparator Level 2 hysteresis. If the comparator input is above L2_TRP + L2_HYS, the comparator trips
and the backlight enters Level 1 (daylight) mode. The following lists the code settings for photosensor
current hysteresis:
0000000 = 0 μA.
00000001 = 4.3 μA.
00000010 = 8.6 μA.
00000011 = 12.9 μA.
…
11111010 = 1080 μA.
…
11111111 = 1106 μA.
Although codes above 1111010 (250) are possible, they should not be used. Furthermore, the maximum
value of L2_TRP + L2_HYS must not exceed 1111010 (250).
Bit 4
Bit 4
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L2_TRP
L2_HYS
Bit 3
Bit 3
Bit 2
Bit 2
Bit 1
Bit 1
Bit 0
Bit 0