Datasheet

12 Atmel LED Drivers-MSL2160/MSL2161
Table 3. Pin Assignments
PIN
PIN NAME
PIN DESCRIPTION
MSL2161 MSL2160
46 PHI PHI
Phase synchronization input
Drive PHI with an external signal from 40Hz to 10kHz to synchronize the MSL2160/1 clock.
PHI is typically driven with the VSYNC signal.
47 GSC GSC
Gate shift clock input
Drive GSC with the gate shift clock of the video signal, from to MHz.
GSC is typically driven with the HSYNC signal.
48 PWM PWM
PWM input
PWM allows external control of the brightness of all LED strings.
Drive PWM with a pulse-width modulated signal with duty cycle ranging from 0% to 100% and
frequency up to 5kHz. When not congured as an input, PWM is high impedance.
49 EN EN
Enable input (active high)
Drive EN high to turn on the MSL2160/1, drive EN low to turn off the MSL2160/1.
For automatic start up, connect EN to VIN.
When EN is low the entire device, including the serial interface, is turned off.
Driving EN high initiates a boot load of the EEPROM data into the control registers,
simulating a cold start up.
50 VIN VIN
Supply voltage input
Connect a 12V ±10% supply to VIN. Bypass VIN to GND with a 10µF
ceramic capacitor placed close to VIN.
51 VDD VDD
2.5V internal LDO regulator output
VDD powers internal logic.
Bypass VDD to GND with a 4.7µF ceramic capacitor placed close to VDD.
52 S0 S0
Source sense input 0
Source sense input for external MOSFET 0.
Connect S0 to the source of the external MOSFET and to the current sense resistor for LED string 0.
The full-scale LED current threshold is reached when 500mV is across the current sense resistor.
If unused, connect S0 to ground.
53 G0 G0
Gate output 0
Gate drive output for external MOSFET 0.
Connect G0 to the gate of the external MOSFET driving LED string 0.
If unused, leave G0 unconnected.
54 D0 D0
Drain sense input 0
Drain sense input for external MOSFET 0.
Connect D0 through a 10MΩ resistor to the drain of the external MOSFET driving LED string 0.
If unused, connect D0 to ground.
55 S1 S1
Source sense input 1
Source sense input for external MOSFET 1.
Connect S1 to the source of the external MOSFET and to the current sense resistor for LED string 1.
The full-scale LED current threshold is reached when 500mV is across the current sense resistor.
If unused, connect S1 to ground.
56 G1 G1
Gate output 1
Gate drive output for external MOSFET 1.
Connect G1 to the gate of the external MOSFET driving LED string 1.
If unused, leave G1 unconnected.