LM3697_15 Datasheet, PDF (17/43 Pages) Texas Instruments – High-Efficiency Three-String White LED Driver

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LM3697
SNOSCS2C – NOVEMBER 2013 – REVISED OCTOBER 2015
7.5 Register Maps
Table 2. LM3697 Register Descriptions
NAME
Revision
Software Reset
HVLED Current Sink Output Configuration
Control A Start-up/Shutdown Ramp Time
Control B Start-up/Shutdown Ramp Time
Control A/B Run time Ramp Time
Control A/B Run time Ramp Configuration
Reserved
Brightness Configuration
Control A Full-Scale Current Setting
Control B Full-Scale Current Setting
HVLED Current Sink Feedback Enables
Boost Control
Auto-Frequency Threshold
PWM Configuration
Control A Brightness LSB
Control A Brightness MSB
Control B Brightness LSB
Control B Brightness MSB
Control Bank Enables
HVLED Open Faults
HVLED Short Faults
LED Fault Enables
ADDRESS
0x00
0x01
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x20
0x21
0x22
0x23
0x24
0xB0
0xB2
0xB4
POWER-ON RESET
0x00
0x00
0x06
0x00
0x00
0x00
0x00
0x33
0x00
0x13
0x13
0x07
0x00
0xCF
0x0C
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
OPERATION
Dynamic
Dynamic
Static
Static
Static
Static
Static
Static
Static
Static
Static
Static
Static
Static
Dynamic ⁽¹⁾
Dynamic ⁽²⁾
Dynamic
Dynamic ⁽²⁾
Dynamic
Dynamic
Production Test Only
Production Test Only
Production Test Only
(1) The PWM inputmust always be in the inactive state when setting the Control bank PWM Enable bit. The PWM configuration bits must
only be changed when the PWM is disabled for both Control Banks.
(2) The Control Brightness MSB Register must be written for the Control Brightness LSB Register value to take effect.
Reserved
Bits [7:4]
Not Used
Table 3. Revision (Address 0x00)
0000 = Rev. A Silicon
Bits [3:0]
Silicon Revision
Reserved
Bits [7:1]
Not Used
Table 4. Software Reset (Address 0x01)
Bit [0]
Silicon Revision
0 = Normal Operation
1 = Software Reset (self-clearing)
Bits [7:3]
Not Used
Reserved
Table 5. HVLED Current Sink Output Configuration (Address 0x10)
Bit [2]
HVLED3 Configuration
0 = Control A
1 = Control B (default)
Bit [1]
HVLED2 Configuration
0 = Control A
1 = Control B (default)
Bit [0]
HVLED1 Configuration
0 = Control A (default)
1 = Control B
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