High-Efficiency, White LED Step-Up Converter
with I 2 C Interface in 2mm x 2mm WLP
Table 4. ON/OFF_CNTL Register (Address 0x00)
BIT
B7 (MSB)
B6
NAME
DESCRIPTION
Reserved for future use
Reserved for future use
BIT
B2
B1
NAME
LED3_EN
LED2_EN
DESCRIPTION
0 = Disable LED3 current regulator
1 = Enable LED3 current regulator
0 = Disable LED2 current regulator
1 = Enable LED2 current regulator
B5
Reserved for future use
B4
LED5_EN
0 = Disable LED5 current regulator
1 = Enable LED5 current regulator
B0 (LSB)
LED1_EN
0 = Disable LED1 current regulator
1 = Enable LED1 current regulator
B3
LED4_EN
0 = Disable LED4 current regulator
1 = Enable LED4 current regulator
Table 5. LED#_RAMP_CNTL Registers (Addresses: 0x03, 0x04, 0x05, 0x06, 0x07)
BIT
B7 (MSB)
B6
B5
B4
B3
B2
B1
NAME
LED#_RAMP_DOWN [2:0]
DESCRIPTION
Reserved for future use
Reserved for future use
Programs LED# current ramp-down rate using bits [5:3] as follows:
000 64ms
001 128ms
010 256ms
010 512ms
100 1024ms
101 2048ms
110 4096ms
111 8192ms
Sets LED# current ramp-up rate using bits [2:0] as follows:
000 64ms
001 128ms
010 256ms
B0 (LSB)
LED#_RAMP_UP [2:0]
010 512ms
100 1024ms
101 2048ms
110 4096ms
111 8192ms
#Indicates the selected LED current regulator (1, 2, 3, 4, or 5).
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