MSLB9082 - Complete

Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Datasheet
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
General Description
The Atmel® compact,
8-channel LED driver board
is a complete LED backlight
driver solution using the Atmel
LED Driver-MSL3162 for
medium-sized LCD panels.
Each channel drives up to 10
series-connected LEDs at up
to 160mA per channel. The
driver board is configured to
operate from a 10 - 16V input
voltage. The full-scale LED
current is preset to 50, 60,
70, or 80mA per LED string,
selected by an onboard switch.
Current can be reduced from
full scale through the I2C serial
interface in 64 linear steps.
Digital (PWM) dimming is
available through an external
signal or by using the internal
PWM generator via the
serial interface.
2
The optional microcontroller board and graphical user interface (GUI)
software allow control of the driver board through a personal computer. This
gives access to the internal features of the MSL3162, including fault detection,
digital control of LED current, individual LED string on/off control, and internally
generated PWM dimming.
The compact eight-channel LED driver board is intended for evaluation,
prototyping, or small production runs. Gerber files and Cadence OrCAD layout
files are available to allow the circuit to be integrated into a larger system for
large production runs.
Applications
• LCD Panel LED Backlight Driver
Ordering Information
PART
DESCRIPTION
MSLB9082
Compact, 8-channel LED driver module
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Key Features
• Drives Up to 8LED Strings
• Four Full-scale Current Settings, Switch Selectable
• Up to 10 LEDs per String
• Four Available Voltage Ranges To Support Multiple
Panels
• Up to 160mA per LED string
• Internally Generated PWM Dimming
• 1.4mhz Switching Frequency
• Internal or External PWM Dimming Control
• I²C Serial Interface
• Digital Control Of LED String Current
• Fault Detection and Protection
• Individual LED String On/Off Digital Control
• 10 To 16V Input Voltage Range
• Short Circuit Or Open Circuit LED String Detection
• Up To 20W Output Power
• Automatic Over-voltage Protection
• Small Size, 1.0” X 2.0”
• Four Available I²C Slave Addresses, Switch Selectable
LED Driver Board
1.0”
(25.4mm)
2.0”
(50.8mm)
Atmel LED Driver-MSLB9082
3
Mechanical Drawing
Figure 1. Atmel LED Driver-MSLB9082 Mechanical Drawing. All Dimensions in Inches.
Connector Pin Descriptions
Table 1. J2 Input Connector Pin Descriptions
PIN NAME
PIN NUMBER
PIN DESCRIPTION
PWR
1,2
NC
3
No connection
NC
4
No connection
NC
5
No connection
SDA
6
I²C serial data
Input power to integrated boost regulator circuit
SCL
7
I²C serial clock
FLTB
8
Active low fault indication output
EN
9
Enable control input
PWM
10
PWM dimming control input
GND
11,12
Ground
Table 2. J3 Output Connector Pin Descriptions
4
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
PIN NAME
PIN NUMBER
PIN DESCRIPTION
VLED
1-8
STRA
9
LED string A cathode connection (MSL3162 STR0 and STR1)
LED string anode output voltage
STRB
10
LED string B cathode connection (MSL3162 STR2 and STR3)
STRC
11
LED string C cathode connection (MSL3162 STR4 and STR5)
STRD
12
LED string D cathode connection (MSL3162 STR6 and STR7)
STRE
13
LED string E cathode connection (MSL3162 STR8 and STR9)
STRF
14
LED string F cathode connection (MSL3162 STR10 and STR11)
STRG
15
LED string G cathode connection (MSL3162 STR12 and STR13)
STRH
16
LED string H cathode connection (MSL3162 STR14 and STR15)
GND
17-20
Ground
Absolute Maximum Ratings
Voltage (With Respect to GND)
STR1-STR6.............................................................................................................................................................................................. -0.3V to +40V
VLED.............................................................................................................................................................................................................. -0.3V to +40V
PWR............................................................................................................................................................................................................... -0.3V to +25V
EN, PWM, SDA, SCL, FLTB........................................................................................................................................................-0.3V to +5.5V
Ambient operating temperature range TA = TMIN to TMAX.................................................................................... -40°C to +50°C
Table 3: Electrical Operating Characteristics
(Typical application circuit, VIN = 12V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C)
PARAMETER
CONDITIONS AND NOTES
MIN
TYP
MAX
UNIT
16
V
DC ELECTRICAL CHARACTERISTICS
Power input voltage
10
EN logic input high level
2.3
V
EN logic input low level
0.8
PWM, SDA, SCL input high voltage
2
V
V
PWM, SDA, SCL input low voltage
0.9
V
FLTB output low voltage
IFLTB = 1mA
0.1
V
FLTB leakage current
VFLTB = 3.6V
1
uA
STR1-STR8 output current
Atmel LED Driver-MSLB9082
ISTRn = 0x3F, S2 position 1
50
mA
ISTRn = 0x3F, S2 position 2
60
mA
ISTRn = 0x3F, S2 position 3
70
mA
ISTRn = 0x3F, S2 position 4
80
mA
5
PARAMETER
CONDITIONS AND NOTES
MIN
TYP
MAX
UNIT
20
kHz
MAX
UNIT
1000
kHz
AC ELECTRICAL CHARACTERISTICS
PWM input frequency
PARAMETER
CONDITIONS AND NOTES
MIN
TYP
I²C SWITCHING CHARACTERISTICS
SCL clock frequency
I2C timeout disabled (Note 1)
Bus timeout
25
ms
Bus free time between a STOP and
START condition
0.5
µs
Hold time for a repeated START condition
0.26
µs
Set-up time for a repeated START condition
0.26
µs
Set-up time for STOP condition
0.26
µs
10
ns
Data hold time
Data valid acknowledge time
(Note 2)
0.05
0.45
µs
Data valid time
(Note 3)
0.05
0.45
µs
Data set-up time
100
ns
LOW period of the SCL clock
0.5
µs
HIGH period of the SCL clock
0.26
µs
Fall time of SDA and SCL signals
(note 4,5)
Rise time of both SDA and SCL signals
Pulse width of spikes that must be
suppressed by the input filter
(Note 6)
SDA, SCL, AD0 input capacitance
120
ns
120
ns
50
ns
10
pF
Note 1. Minimum SCL clock frequency is limited by the bus timeout feature, which resets the serial bus interface if either SDA or SCL is held low for
25ms. Disable bus timeout feature for DC operation.
Note 2. Time for acknowledge signal from SCL low to SDA (out) low.
Note 3. Minimum time for SDA data out to be valid following SCL low.
Note 4. A master device must internally provide a hold time of at least 300ns for the SDA signal (refer to the VIL of the SCL signal) in order to
bridge the undefined region of SCL falling edge.
Note 5. The maximum fall times for the SDA and SCL bus lines are specified at 300ns. The maximum fall time for the SDA output stage is specified
at 250ns. This allows series protection resistors to be connected between SDA and SCL and the SDA/SCL bus lines without exceeding the
maximum specified fall time.
Note 6. Input filters on the SDA, SCL, and AD0 inputs suppress noise less than 50ns
6
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Typical Performance Characteristics
String Phasing
Efficiency Optimizer Initial Calibration
Atmel LED Driver-MSLB9082
7
Typical Performance Characteristics (Continued)
Efficiency Optimizer Auto Recalibration
Detailed Description
The MSLB9082 is a stand-alone, eight-channel LED driver board suitable for integration into small-production devices. It
includes an I2C serial interface for accessing the digital features of the MSL3162 LED driver. It has onboard switches that
set the I2C slave address to one of four available addresses, a switch to set the full-scale LED current to 50, 60, 70, or
80mA in single-string mode, and 100, 120, 140, or 160mA in dual-string mode, and a switch to set the maximum LED
voltage to 39, 36, 32, or 28V. The board is powered from a single input voltage between 10V and 16V.
Input Power
The MSLB9082 board is powered from a single input voltage ranging from 10 to 16V.
Setting the Full-scale LED Current
The MSL3162 regulates the LED string current. The LED string current is set by a current sense resistor. Four different
values are programmed to the MSLB9082 LED driver module, and switch S2 selects one of those resistors to set the
full-scale, per-string LED current to 50, 60, 70, or 80mA. Table 4 shows the switch settings and the full-scale, per-string
LED current for each setting.
Table 4: Full-scale, Per-string LED Current (S2) Settings
8
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
FULL-SCALE LED CURRENT
SWITCH S2 POSITION
FULL-SCALE, PERSTRING LED CURRENT
FULL-SCALE LED
CURRENT SWITCH S2
POSITION
50mA
Position 1
FULL-SCALE, PERSTRING LED CURRENT
70mA
Position 3
60mA
Position 2
80mA
Position 4
When using the I2C serial interface, the per-string LED current is changed from the full-scale value by programming the
ISTRn register, where n is the LED string number from 0 to 15. The ISTRn register is a 6-bit word that sets the LED current
for each LED string to one of 64 linear levels. The per-string LED current is:
ISTRn = ISTR_FULL
ISTRn+1
64
,
where ISRTn is the current of LED string n, ISTR_FULL is the full-scale LED current set by S2, and ISRTn is the value of the
current setting register for string n between 0 and 64 (0x3F).
Atmel LED Driver-MSLB9082
9
I2C Serial Interface
The MSLB9082 driver module uses an I2C/SMBus serial interface for digital LED control and fault detection. Four slave ID
addresses are available, and are selected by the I2C address selection switch. The addresses are shown in table 5.
Table 5: I2C Slave Address Switch (S1) Settings
ADDRESS SWITCH S1
POSITION
I²C SLAVE ADDRESS
ADDRESS SWITCH S1 POSITION
0xA0
Position 1
0xA4
Position 3
0xA6
Position 2
I²C SLAVE ADDRESS
0xA2
Position 4
There are a number of features available through the I2C serial interface. Table 5 shows the registers for the MSL3162 LED driver.
10
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Table 6. Atmel LED Driver-MSL3162 Register Map
REGISTER
CONTROL0
CONTROL1
ADD- DEFAULT
FUNCTION
RESS VALUES
0x00
0x01
0x55
0x55
POWERCTRL 0x02
0x7F
LED string
enables
FLTSTATUS
0x03
RO
FLTMASK0
0x04
0xFF
FLTMASK1
0x05
0xFF
OCSTAT0
0x06
RO
OCSTAT1
0x07
RO
SCSTAT0
0x08
RO
SCSTAT1
0x09
RO
STRFB0
STRFB1
STRFB2
0x0A
0x0B
0x0C
0x55
0x55
0x55
STRFB3
0x0D
0x55
FBOCTRL0
0x10
0x00
FBOCTRL1
0x11
0x00
Fault
configuration
Fault status,
global
Fault enables,
string
monitoring
Fault status,
LED string
open circuit
Fault status,
LED string
short circuit
LED string
feed-back
assignment to
power supplies
FBO1, FBO2,
FBO3
Efficiency
optimizer
configuration
FBODAC1
FBODAC2
FBODAC3
0x12
0x13
0x14
RO
RO
RO
Efficiency
optimizer DAC
Readback
OSCCTRL
0x18
0x04
0x1A
0xF9
IGSCGEN
0x1B
0x00
0x1C
0x00
0x1D
0x1F
PWMCTRL0
0x20
0xC0
PWMCTRL1
0x21
0x03
SYSTEMP
0x22
0x00
OTTEMP
0x23
0x00
OTSLOPE
0x24
0x00
0x25
0x00
0x26
0x00
0x27
0x00
0x28
0x00
0x29
0x00
IPHIGEN
GSCMAX
PHIMIN
HPSCR
Atmel LED Driver-MSLB9082
Oscillator
frequency
GSC clock
generator
internal
PHI clock
generator
internal
PWM and
phase control
configuration
System
temperature
Over-temp
derating
threshold
Over-temp
derating slope
Max osc.
cycles per
GSC pulse
Min GSC
pulses over
PHI period
GSC divider
D7
STR7EN
STR15EN
D6
D5
REGISTER DATA
D4
D3
STR6EN STR5EN STR4EN
STR3EN
STR14EN STR13EN STR12EN STR11EN
D2
D1
STR2EN
STR10EN
D0
STR1EN STR0EN
STR9EN STR8EN
SLEEP
-
SCEN
OCEN
0*
TOEN
FBEN
PHAEN
0
SCDET
OCDET
0
0
0
FLTEN7
FLTEN6
FLTEN5
FLTEN4
FLTEN3
FLTEN2
FLTEN1
FLTEN0
FLTEN15
FLTEN14
FLTEN13
FLTEN12
FLTEN11
FLTEN10
FLTEN9
FLTEN8
OC7
OC6
OC5
OC4
OC3
OC2
OC1
OC0
OC15
OC14
OC13
OC12
OC11
OC10
OC9
OC8
FBOICAL FLTDET
SC7
SC6
SC5
SC4
SC3
SC2
SC1
SC0
SC15
SC14
SC13
SC12
SC11
SC10
SC9
SC8
STRFB3[1:0]
STRFB7[1:0]
STRFB11[1:0]
STRFB2[1:0]
STRFB6[1:0]
STRFB10[1:0]
STRFB1[1:0]
STRFB5[1:0]
STRFB9[1:0]
STRFB0[1:0]
STRFB4[1:0]
STRFB8[1:0]
STRFB15[1:0]
STRFB14[1:0]
STRFB13[1:0]
STRFB12[1:0]
HLDSTEP[1:0]
FBCLDLY[1:0]
FBSDLY[1:0]
FBCFDLY[1:0]
SCCDLY[1:0]
-
-
DSTAT1
DSTAT2
DSTAT3
0
0
0
0
0
0
0
0
0
-
-
-
-
ACALPWM ACALFSTR ACALEN
TRIDIS
FBODAC1[3:0]
FBODAC2[3:0]
FBODAC3[3:0]
-
OSC[2:0]
IGSCGEN[7:0]
IGSCGEN[15:8]
IPHIGEN[7:0]
IPHIGEN[15:8]
HPSCREN
GINTEN
-
-
PHIPOL OTPDIGEN PHIMINEN GSCMAXEN FSNOZSK
-
-
-
PWMMODE
INTPHI
1*
INTGSC
SYSTEMP[7:0]
OTTEMP[7:0]
OTSLOPE[7:0]
GSCMAX[7:0]
GSCMAX[15:8]
PHIMIN[7:0]
-
-
-
-
PHIMIN[15:8]
-
-
-
-
HPSCR[3:0]
11
Table 6. Atmel LED Driver - MSL3162 Register Map
REGISTER
ADD- DEFAULT
FUNCTION
RESS VALUES
FRATE
0x2A
0x01
GINT
0x2B
0x2B
ISTR0
0x30
To
0x20
ISTR15
0x3F
PHDLY0
PHDLY1
PHDLY2
PHDLY3
PHDLY4
PHDLY5
PHDLY6
PHDLY7
PHDLY8
PHDLY9
PHDLY10
PHDLY11
PHDLY12
PHDLY13
PHDLY14
PHDLY15
PWM0
to
0x40
0x41
0x42
0x43
0x44
0x45
0x46
0x47
0x48
0x49
0x4A
0x4B
0x4C
0x4D
0X4E
0x4F
0x50
PWM15
0x5F
E2ADDR
0x90
E2CTRLSTA
0x91
PHI freq.
multiplier
Global
intensity
LED string
6-bit individual
analog current
settings
0x00
0x00
0x20
0x20
0x40
0x40
0x60
0x60
0x80
0x80
0xA0
0xA0
0xC0
0xC0
0xE0
0xE0
LED string
8-bit individual
PWM
phase settings
0x30
LED string
8-bit individual
PWM intensity
settings
D7
D6
D5
-
-
-
-
-
-
-
REGISTER DATA
D4
D3
D2
D1
D0
FRATE[4:0]
GINT[6:0]
ISTR0[5:0]
to
-
-
ISTR15[5:0]
PHDLY0[7:0]
PHDLY1 [7:0]
PHDLY2[7:0]
PHDLY3[7:0]
PHDLY4[7:0]
PHDLY5[7:0]
PHDLY6[7:0]
PHDLY7[7:0]
PHDLY8[7:0]
PHDLY9[7:0]
PHDLY10[7:0]
PHDLY11[7:0]
PHDLY12[7:0]
PHDLY13[7:0]
PHDLY14[7:0]
PHDLY15[7:0]
PWM0[7:0]
To
PWM15[7:0]
Do not access address range 0x60 to 0x8F
User
E2ADDR[6:0]
EEPROM
read/write E2BUSY BLDACT E2ERR
SLVATCNT[1:0]
access
RWCTRL[1:0]
For detailed descriptions of the MSL3162 register-controlled operating modes, see the MSL3162 Datasheet.
12
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Setting the Internal PWM Dimming
Frequency and Duty Cycle
The MSL3162 internally generates the PWM dimming
duty cycle and frequency. The PWM dimming
frequency is programmable, as are the PWM duty cycle
and phasing between LED strings.
Setting the PWM Dimming Frequency
The PWM frequency (PHI frequency) is internally set
by the IPHIGEN register. This 16-bit number sets the
divider ratio from an internal 2.5MHz clock. Therefore,
the PWM frequency is:
f PWM =
2.5MHz
IPHIGEN
For high dimming accuracy, keep the PWM dimming
frequency below 10kHz. To set the PWM frequency,
program the IPHIGEN register between 38Hz and
10kHz per the equation:
IPHIGEN =
2.5MHz
,
f PWM
where IPHIGEN ranges between 250 (0x00FA) and
65535 (0xFFFF)
For full PWM dimming resolution, make sure that the
ratio between the IGSCGEN register and IPHIGEN
register is 32. See Setting the PWM Dimming
Resolution for more details.
Setting the PWM Dimming Resolution
The MSL3162 uses the IPHIGEN register to set the
PWM dimming frequency, and it uses the IGSCGEN
register to set the PWM dimming resolution (GSC
frequency). The MSL3162 internally counts using the
frequency set by the IGSCGEN register to set the PWM
duty and phasing. Full PWM dimming is achieved if the
ratio of IGSCGEN to IPHIGEN is less than 32. If the ratio
is greater than 32, then the maximum achievable duty
cycle is:
 IGSCGEN − 1 
DMAX = 32 × 

 IPHIGEN 
Atmel LED Driver-MSLB9082
For DMAX>1, the maximum duty cycle is 100%.
Setting the LED PWM Dimming Duty Cycle
The MSL3162 allows each LED string to operate at
different duty cycles and phases. The per-string PWM
dimming duty cycle for any LED string is set by the
PWMn register, where n is the LED string number.
The MSL3162 also offers PWM dimming of all strings
simultaneously through the global intensity (GINT)
register. Each string PWM on time is set by the eight
most-significant bits of the product of the PWMn
and GINT registers, multiplied by the GSC period:
 1
t ON_PWMn = 
 f GSC
  PWMn * GINT 
 * 

64

 
 IGSCGEN − 1   PWMn * GINT 
t ON_PWMn = 

*
64

 20 MHz  
where PWMn ranges from 0 to 256 (0xFF) and GINT
ranges from 0 to 64 (0x3F).
Setting the LED PWM Dimming Phasing
Each LED string’s PWM dimming occurs with
independent phasing. This is useful to force phase
shifted PWM dimming, which reduces the transient load
on the DC-DC converter, improving performance.
The phase of each LED string is set by PHDLYn,
where n is the LED string number. The MSL3162
counts GSC pulses to determine the on-time delay
from the beginning of each PHI frame. For example,
if PHDLY0 is set to 0x00, the LED string 0 on time
starts at the beginning of a PHI frame. If PHDLY0 is
set to 0x40, the LED string 0 on time begins at 64
(0x40) GSC pulses after the beginning of a PHI frame.
 1
t PHDLYn = 
 f GSC

 * PHDLYn

 IGSCGEN − 1 
t PHDLYn = 
 * PHDLYn
 20 MHz 
13
Setting the LED Voltage Range
The MSL9082 LED driver board uses four different voltage ranges to power the LEDs, which are set through the S3
switch. The ranges are shown in Table 7. The MSL3162 automatically adjusts the LED voltage over a 7.4V range to
minimize power loss while maintaining enough current sink headroom to keep the LED string current accurate. Choose
an LED voltage range that suits the LEDs used so that the MSL3162 can adjust the voltage to optimize for the LED
voltage. For more information, consult the MSL3162 data sheet.
Table 6: LED Voltage Settings
VOLTAGE SWITCH S3
POSITION
LED VOLTAGE RANGE
VOLTAGE SWITCH S3
POSITION
28.8V to 21.3V
Position 1
37.1V to 29.6V
Position 3
39.7V to 32.3V
Position 2
14
LED VOLTAGE RANGE
33.0V to 25.6V
Position 4
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
On/Off (EN) Control Input
Fault Indicator Output
The on/off control input, pin 9 of input connector J2,
turns on/off the LED driver. Drive it high (between 2.3
and 5V) to turn on the LED driver, and drive it low (0 to
0.8V) to turn it off. The on/off control input is internally
pulled up by a 100kΩ resistor. For automatic start-up,
leave EN unconnected.
The MSL3162 includes fault detection circuitry that
detects and open-circuited LED string, and an LED string
with one or more short-circuited LEDs. If any fault is
detected, the output is driven low. Use this output as an
alert signal to a system controller. Once the controller
gets the alert signal, it determines which LED is faulty
by reading the STATUS, OCSTATUS, and SCSTATUS
registers through the I2C serial interface.
External PWM Control Input
The MSL3162 operates in one of three modes: internal
PWM mode, external PWM mode, or gated PWM mode.
Internal PWM mode dims the LEDs with a frequency
and phase set by the MSL3162, and the state of
the PWM input is ignored and has no effect on LED
brightness. In this case, each string can have a different
PWM set by the MSL3162’s PWMn register setting. To
control the brightness of all LEDs simultaneously, set the
GINT register between 0 and 3F.
External PWM and gated PWM modes use the duty
cycle of the signal applied to the PWM input; connector
J2, pin 10. The PWM input is pulled high through a
100kΩ resistor. If not used, leave PWM unconnected
or drive it high. The MSL3162 digitizes the PWM input
signal and determines the duty cycle of that signal. This
value replaces the GINT register value to control the
global brightness (of all LEDs simultaneously). In this
case, individual string brightness is controlled through
the PWMn register.
Gated PWM mode turns on all LEDs when PWM is
driven high, and turns them off when PWM is driven
low. By programming the PWMn registers and GINT for
100% duty cycle, the LEDs are directly PWM dimmed
by the signal applied to the PWM input.
Atmel LED Driver-MSLB9082
Connecting the LEDs to the Atmel LED DriverMSL9082 LED Driver
The MSLB9082 driver board drives LED arrays with
up to eight parallel strings of up to 12 series LEDs each
through the output connector, J3. Eight connections for
LED cathode connections allow the use of separate LED
strings or common-anode-connected LED strings.
Driving LEDs with Greater than 80mA
LED Current
The MSL3162 is capable of driving up to 80mA per
LED string. The MSLB9082 board has two string
drivers connected to each driver connection (STRASTRH), with one disabled. This allows driving up to
180mA per LED string by enabling the two drivers and
setting the same PWM duty ratios and phasing for both
MSL3162 driver inputs (dual-string mode). See the
MSL3162 datasheet for more details on programming
the MSL3162.
Table 8 shows the switch settings and the full-scale,
per-string LED current for each setting when operating
in parallel mode.
15
Table 8. Settings for Higher Currents
FULL-SCALE LED
CURRENT SWITCH S2
POSITION
FULL-SCALE, PERSTRING LED CURRENT
FULL-SCALE LED CURRENT
SWITCH S2 POSITION
100mA
Position 1
140mA
Position 3
120mA
Position 2
16
FULL-SCALE, PERSTRING LED CURRENT
160mA
Position 4
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Atmel LED Driver-MSLB9082 Schematic
Figure 2: Atmel LED Driver-MSLB9082 Board Schematic.
Atmel LED Driver-MSLB9082
17
Atmel LED Driver-MSLB9082 Component Placement
Figure 3: EVU-MSL3162-BLU1 Component Placement.
18
Atmel LED Driver-MSLB9082
Atmel LED Driver-MSLB9082
LED Backlight Driver Module
Compact, 8-channel, 20W LED Driver Board with I2C Interface
Atmel LED Driver-MSLB9082 Bill of Materials
Atmel LED Driver-MSL3162 LED driver board revised: Wednesday, October 7, 2009
Revision: 3
ITEM
QUANTITY
REFERENCE
PART
1
1
C1
1µF/6.3V
2
1
C2
4.7µF/6.3V
3
4
C3,C4,C13,C14
2.2µF/100V
4
1
C5
2.2µF
5
2
C8,C9
1µF/25V
6
1
C10
0.1µF/25V
7
1
C11
3.3nF
8
1
C12
0.01µF
9
1
D1
Schottky rectifier, Diodes DLFS140
10
1
D2
Schottky rectifier, Central CMAD6263
11
1
J1
12-position connector, JST SM12B-SRSS
12
1
J2
20-position connector, JST SM20B-SRSS
13
1
L1
5.6uH inductor, Sumida CDRH5D20-5R6
14
2
R1,R5
Do Not Stuff
15
1
R3
100kΩ
16
1
R4
165kΩ
17
1
R7
42.2kΩ
18
1
R8
26.1kΩ
19
1
R9
30.1kΩ
20
1
R10
34.8kΩ
21
1
R11
4.7kΩ
22
1
R12
80kΩ
23
1
R13
7.50kΩ
24
1
R14
6.49kΩ
25
1
R15
5.76kΩ
26
1
R16
5.36kΩ
27
3
SW1,SW2,SW3
4-position switch, Copal CS-4-14
28
1
U1
16-channel LED driver, MSL3162
29
1
U3
5V regulator, Micrel MIC5233
30
1
U4
Boost regulator, TI TPS61175
Atmel LED Driver-MSLB9082
19
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131
USA
Tel: (+1)(408) 441-0311
Fax:(+1)(408) 487-2600
www.atmel.com
Atmel Asia Limited
Unit 01-5 & 16, 19F
BEA Tower, Millennium City 5
418 Kwun Tong Road
Kwun Tong, Kowloon
HONG KONG
Tel: (+852) 2245-6100
Fax:(+852) 2722-1369
Atmel Munich GmbH
Business Campus
Parkring 4
D-85748 Garching b. Munich
GERMANY
Tel: (+49) 89-31970-0
Fax:(+49) 89-3194621
Atmel Japan
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
JAPAN
Tel: (+81)(3) 3523-3551
Fax:(+81)(3) 3523-7581
© 2011 Atmel Corporation. All rights reserved. / Rev.: MEM-MSLB9082DS1-E-US_06-11
Atmel®, logo and combinations thereof, and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be
trademarks of others.
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel
products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY
RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR
INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and
reserves the right to make changes to specifications and products descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not
suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.