LM3632A Datasheet, PDF (36/64 Pages) Texas Instruments – Single-Chip Backlight With Bias Power and 1.5-A Flash LED Driver

LM3632A
SNVSA63A – APRIL 2015 – REVISED SEPTEMBER 2015
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Bit Field
7
Reserved
6
PWM_EN
5
Reserved
4
STROBE_EN
3
Reserved
2
TX_EN
1
VINM_MODE
0
VINM_EN
Table 15. I/O Control Register Field Descriptions
Type
Reset
Description
R/W
0
This bit enables and disables the PWM input pin. If enabled, the
backlight LED current ramps up to
Target_Current*PWM_Duty_Cycle. If disabled, the PWM input is
ignored.
0: PWM disabled (Default)
1: PWM enabled
R/W
0
Hardware flash enable
0: STROBE disabled (Default)
1: STROBE enabled
R/W
0
R/W
0
R/W
0
Flash Interrupt mode enable
0: TX disabled (Default)
1: TX enabled
Selects the VIN Monitor current reduction level
0: Flash driver returns to standby mode (Default)
1: Flash current reduced to programmed Torch current level
Set this bit to enable VIN Monitor function
0: Disabled (Default)
1: Enabled
7.6.10 Enable (Address = 0x0A) [reset = 0x00]
Figure 48. Enable Register
7
6
5
4
SWR_RESET
Reserved
BL_OVP_SET BLED1_EN
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
3
BLED1/2_EN
R/W-0
2
FLASH_MODE
R/W-0
1
FLASH_EN
R/W-0
0
BL_EN
R/W-0
Bit Field
7
SWR_RESET
6
Reserved
5
BL_OVP_SET
4
BLED1_EN
3
BLED1/2_EN
2
FLASH_MODE
1
FLASH_EN
0
BL_EN
Table 16. Enable Register Field Descriptions
Type
R/W
R/W
R/W
Reset
0
0
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Description
Setting this bit resets all registers to their default values. Bit
auto-clears (returns to "0" upon device reset).
0: Reports flag if OVP condition detected, but no action taken
(Default)
1: OVP causes shutdown
Backlight sink 1 enable only
0: Disabled (Default)
1: Enabled
Backlight sink 1 and sink 2 enable. Has priority over bit[4]
(BLED1_EN).
0: Backlight sink 2 disabled, backlight sink 1 status depends on
BLED1_EN bit status (Default)
1: Backlight sink 1 and sink 2 enabled regardless of BLED1_EN
bit status
Selects Torch or Flash mode for flash LED output
0: Torch (Default)
1: Flash
Flash LED output enable
0: Disabled (Default)
1: Enabled
Backlight output enable
0: Disabled (Default)
1: Enabled
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