Datasheet

7Atmel LED Drivers-MSL3163/MSL3164
PIN
PIN NAME
PIN DESCRIPTION
MSL3163 MSL3164
36 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.
37 NC NC
No connect
Leave NC unconnected.
38 FBO1 FBO1
Efciency Optimizer output 1
Connect FBO1 to the rst power supply’s feedback node or to FBI1 of the previous device when chaining
devices (Figure 7). If unused connect FBO1 to GND.
39 FBI1 FBI1
Efciency Optimizer input 1
Connect FBI1 to FBO1 of the next device when chaining devices (Figure 7). If unused connect FBI1 to GND.
40 FBO2 FBO2
Efciency Optimizer output 2
Connect FBO2 to the second power supply’s feedback node or to FBI2 of the previous device when chaining
devices (Figure 7). If unused connect FBO2 to GND.
EP EP EP
Exposed pad, power ground
EP is the path that the string currents take to ground. EP also provides thermal relief for the die. Provide
large traces from EP back to the string power supplies. Also connect EP to system ground, and to GND
using short, wide traces.
Absolute Maximum Ratings
Voltage (With Respect to GND, CGND = EP = GND)
VIN, EN ........................................................................................................................................................................ -0.3V to +6V
VDD ......................................................................................................................................................................... -0.3V to +2.75V
MSL3163: SDA, SCL ............................................................................................................................................ -0.3V to +6V
MSL3164: MISO, MOSI, CSB, SCK ........................................................................................... -0.3V to (VIN + 0.3V)
FLTB .............................................................................................................................................................................. -0.3V to +6V
ILED, AD0, AD1 .................................................................................................................................-0.3V to (VDD + 0.3V)
PHI, GSC, PWM, FBO1, FBO2, FBO3, FBI1, FBI2, FBI3................................................. -0.3V to (VIN + 0.3V)
STR0 thru STR15 ............................................................................................................................................... -0.3V to +40V
CGND ....................................................................................................................................................................... -0.3V to +0.3V
Current (Into Pin)
VIN ............................................................................................................................................................................................... 50mA
EP ........................................................................................................................................................................................... -1700mA
STR0 thru STR15 ............................................................................................................................................................. 105mA
All other pins ............................................................................................................................................................................ 20mA
Continuous Power Dissipation
40-Pin 6mm x 6mm QFN (derate 37mW/°C above T
A
= +70°C) .....................................................2963mW
Ambient Operating Temperature Range T
A
= T
MIN
to T
MAX
............................................................... -40°C to +85°C
Junction Temperature ......................................................................................................................................................... +125°C
Storage Temperature Range ........................................................................................................................ -65°C to +125°C
Lead Soldering Temperature, 10s .................................................................................................................................. +300°C
Atmel LED Drivers-MSL3163 and MSL3164
16-string White & RGB LED Drivers with Adaptive Power
Control, E²PROM, and SPI/I²C/SMBus Serial Interface