Datasheet

7Atmel LED Driver-MSL2100
PIN NAME DESCRIPTION
1 AD1
I²C slave ID selection inputs
AD1 and AD0 select the device I²C slave address.
2 SCL
I²C serial clock input
SCL is the I²C serial interface clock input.
3 SDA
I²C serial data I/O
SDA is the I²C serial interface data I/O.
4 AD0
I²C slave ID selection inputs
AD0 and AD1 select the device I²C slave address.
5 FLTB
Fault output (open drain, active low)
FLTB sinks current to GND when the MSL2100 detects a fault.
FLTB remains low until the fault registers have been read or EN is toggled low.
6 FBI1
Efciency Optimizer input
Connect FBI1 to FBO1 of the next device when chaining the Efciency Optimizers.
If unused, connect FBI1 to GND.
7 FBO1
Efciency Optimizer output
Connect FBO1 through a Schottky diode to the string power supply’s feedback node (Figure 4)
or to FBI1 of the previous device (Figure 5).
If unused, leave FBO1unconnected.
8 FBI2
Efciency Optimizer input
Connect FBI2 to FBO2 of the next device when chaining the efciency optimizers.
If unused, connect FBI2 to GND.
9 FBO2
Efciency Optimizer output
Connect FBO2 through a Schottky diode to the string power supply’s feedback node (Figure 4)
or to FBI2 of the previous device (Figure 5).
If unused, leave FBO2 unconnected.
10 FBI3
Efciency Optimizer input
Connect FBI3 to FBO3 of the next device when chaining the efciency optimizers.
If unused connect FBI3 to GND.
11 FBO3
Efciency Optimizer output
Connect FBO3 through a Schottky diode to the string power supply’s feedback node (Figure 4)
or to FBI3 of the previous device (Figure 5).
If unused, leave FBO3 unconnected.
12, 40 GND
Power ground
Connect GND to system ground, to CGND, and to EP with short, wide traces.
13, 16, 19, 22,
25, 28, 31, 34
S0 - S7
String 0 thru 7 source sense inputs
Connect S
n
to the source of external MOSFET
n
and to the current sense resistor for LED string
n
.
The full-scale LED current is reached when 500mV is across the current sense resistor.
14, 17, 20, 23,
26, 29, 32, 35
G0 - G7
String 0 thru 7 external MOSFET gate drive outputs
Connect G
n
to the gate of external MOSFET
n
.
15, 18, 21, 24,
27, 30, 33, 36
D0 - D7
String 0 thru 7 external MOSFET drain sense inputs
Connect D
n
to the drain of external MOSFET
n
through a 10MΩ resistor.
37 VIN
Supply voltage input
Connect a 12V ±10% supply to VIN.
Bypass VIN to GND with a 1µF ceramic capacitor placed close to VIN.
38 VDD
Internal 2.5V regulator capacitor connection
Bypass VDD to GND with a 10µF ceramic capacitor placed close to the device.
Pin Descriptions
Atmel LED Driver-MSL2100
8-string, High-power, White or RGB LED Drivers for TVs,
Monitors, or Intelligent Solid-state Lighting