
Atmel LED Driver-MSL3082
8-string, High-power, White or RGB LED Driver for TV,
Blacklighting, or Intelligent Solid-state Lighting
REGISTER AND
ADDRESS
FUNCTION
D7
D6
D5
REGISTER DATA
D4 D3
D2
D1
D0
FBODAC*
0x59
Efficiency
Optimizer
DAC
readback
FBOACT
-
-
-
FBODAC[3:0]
DO NOT ACCESS ADDRESS RANGE 0X58 TO 0X8F
E2ADDR
E2CTRLSTA
0x90
0x91
User
EEPROM
read/write
access
-
E2BUSY
BLDACT
E2ERR
-
E 2ADDR[6:0]
-
RWCTRL[1:0]
* Read-only registers
Register Power-up Defaults
Register power-up default values are shown in Table 4.
Table 4. Atmel LED Driver-MSL3082 Register Power-up Defaults
REGISTER NAME
AND ADDRESS
POWER-UP CONDITION
REGISTERS INITIALIZED
FROM EEPROM
D7
D6
D5
REGISTER DATA
D4 D3 D2 D1
D0
HEX
0x00
0x02
0x03
0x04
0x05
0x06
0x08
0x0B
0x0C
0x0D
0x0E
0x0F
CONTROL
POWERCTRL
OSCCTRL
OTTEMP
SYSTEMP
OTSLOPE
PWMCTRL
GINT
GSCDIV
PHIMUL
STR03FBO
STR47FBO
All LED strings drive outputs are enabled
String phase delay enabled
Efficiency Optimizer feedback output enabled
I 2 C bus timeout enabled
Direct PWM disabled
String open circuit detection enabled
String short circuit detection enabled
Device awake
Internal oscillator f OSC set to 20MHz
Over-temperature threshold is 90°C
System temperature set to 30°C
Over-temperature slope set to 50°C
PWM operation enabled
String on-times truncated at end of frame
GSC low frequency fault detection disabled
PHI high frequency fault detection disabled
Over-temperature derating of string on times enabled
PWM frame synchronized to rising edge at PHI input
GINT global intensity control enabled
GSC input frequency division disabled
Global intensity PWM duty cycle GINT = 15/64 = 23.4%
GSC input frequency is divided by 2^0
PHI input frequency is multiplied by 1
All strings are monitored by the Efficiency Optimizer
1
0
0
0
0
0
0
0
0
0
1
1
1
1
0
1
0
0
1
0
0
0
1
1
1
1
0
0
0
1
1
0
0
0
1
1
1
1
0
1
1
1
1
0
0
0
1
1
1
0
0
1
1
0
0
1
0
0
1
1
1
1
1
0
1
0
0
1
0
0
1
1
1
1
0
1
1
1
0
1
0
0
1
1
1
1
0
0
0
0
1
1
0
1
1
1
FF
77
04
5A
1E
32
71
0F
00
01
FF
FF
Atmel LED Driver-MSL3082
15