ADP5501 Analog Devices, ADP5501 Datasheet - Page 21

• Manufacturer Part Number: ADP5501
• Description: Programmable Current Backlight Driver with Ambient Light Sensor Input
• Manufacturer: Analog Devices

Specifications of ADP5501

• Vin Range: 2.7 to 5.5V
• Vout (v): 24 to 27
• Synchronous: No
• Package: 24-Lead LFCSP
• Led Configuration: Serial
• Topology: Inductive
• I2c Support: Yes
• Max Iout (ma): 30mA
• Brightness Control: I2C
• Switching Frequency: 1MHz
• Over Volt Protection (v): 24V

Bit
3
2
1
0
Table 10. Register 0x03, Backlight Off and Dim Timers (BL_TIME)
Bit
7 to 4
3 to 0
Name
BL_OFFT
BL_DIMT
Name
BL_AUTO_AD
J
OVP_EN
FOVR
Not used
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0 = soft OVP protection disabled.
Description
Backlight off timer; the timer should be set before BL_EN is set.
0000 = the timer is disabled.
0001 = 10 sec.
0010 = 15 sec.
0011 = 20 sec.
0100 = 25 sec.
0101 = 30 sec.
0110 = 35 sec.
0111 = 40 sec.
1000 = 50 sec.
1001 = 60 sec.
1010 = 70 sec.
1011 = 80 sec.
1100 = 90 sec.
1101 = 100 sec.
1110 = 110 sec.
1111 = 120 sec.
0000 = the timer is disabled.
0001 = 10 sec.
0010 = 15 sec.
0011 = 20 sec.
0100 = 25 sec.
0101 = 30 sec.
0110 = 35 sec.
0111 = 40 sec.
1000 = 50 sec.
1001 = 60 sec.
1010 = 70 sec.
1011 = 80 sec.
1100 = 90 sec.
1101 = 100 sec.
1110 = 110 sec.
1111 = 120 sec.
Description
0 = ambient light sensor comparators have no effect on the backlight operating level. The user can
manually adjust the backlight operating level using the BL_LVL bits.
1 = ambient light sensor comparators automatically adjust the backlight operating level. The internal
state machine takes control of the BL_LVL bits.
1 = soft OVP protection enabled.
0 = backlight fade override is disabled.
1 = backlight fade override is enabled.
Backlight dim timer; the timer should be set before BL_EN is set.
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ADP5501