LTC3207-1_15 Datasheet, PDF (12/20 Pages) Linear Technology – 600mA Universal Multi-Output LED/CAM Driver

LTC3207/LTC3207-1
OPERATION
REG0, Command Byte.
Register Sub-Address = 0000
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
CAMHL Reserved Reserved Reserved Force2x Force1p5 Quick write
UP
UP
Quick write
Force1p5
Force2x
Force1x
Reserved
Reserved
Reserved
CAMHL
0 Gradation counts down
1 Gradation counts up
0 Normal write to each register
1 Quick write, REG1 data is written to all twelve universal registers
1 Forces charge pump into 1.5x mode
0 Enables mode logic to control mode charges based on dropout signal
1 Forces charge pump into 2x mode.
0 Enables mode logic to control mode changes based on dropout signal
} ^{D2 (Force1p5x) = 1}
D3 (Force2x) = 1 ^{Forces Charge Pump Into 1x Mode}
X
X
X
0 External control of CAM
1 I²C control of CAM
Data Bytes
REG1 to REG12, Universal LED 6-bit linear DAC data with
blink/gradation.
Sub-Address 0001 TO 1100 per Sub-Address Table Above
ULED Mode Enable Bits
LED Current Data
MSB
LSB
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Normal
0
Blink Enabled
0
Gradation Enabled
1
GPO Mode
1
(Gradation/Blink/Dropout Off)
0
D5
D4
D3
D2
D1
D0
1
D5
D4
D3
D2
D1
D0
0
D5
D4
D3
D2
D1
D0
1
D5
D4
D3
D2
D1
D0
3207fc
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