Datasheet

11Atmel LED Driver-MSL1060
PARAMETER CONDITIONS AND NOTES MIN TYP MAX UNIT
DC ELECTRICAL CHARACTERISTICS - LOGIC I/OS
EN logic high input voltage 2.3 V
EN logic low input voltage 0.8 V
EN logic input current V
EN
= 3V 20 µA
EN logic input series resistance Between EN input and internal Zener clamp 10.5 kΩ
EN logic input Zener clamp 5.8 V
PWM logic high input voltage 2 V
PWM logic low input voltage 0.9 V
FLTB output low voltage Sinking 1mA 0.1 0.2 V
IADJ, FLTB, PWM leakage current 10 µA
PARAMETER CONDITIONS AND NOTES MIN TYP MAX UNIT
DC ELECTRICAL CHARACTERISTICS - BOOST REGULATOR
SW on resistance I
SW
= 100mA 0.4 0.6 Ω
SW current limit 2 A
OSC regulation voltage R4 = 115kΩ ±1% 1.195 1.22 1.245 V
STR0-STR5 boost regulation voltage R5
= 100kΩ, PWM=100% (Note 6) 600 mV
OVP threshold V
OVP
rising 1.25 1.28 1.31 V
OVP hysteresis 60 mV
OVP leakage current V
OVP
= 3.6V 1 µA
PARAMETER CONDITIONS AND NOTES MIN TYP MAX UNIT
AC ELECTRICAL CHARACTERISTICS
PWM input frequency 0 50 kHz
PWM input duty ratio 0 100 %
Boost regulator switching frequency R4 = 115kΩ ±1% 0.99 1.1 1.21 MHz
Boost regulator maximum duty ratio R4 = 115kΩ ±1% 89 92 %
Boost regulator startup time 100 120 ms
Note 1. All parameters are tested at T
A
=25°C, unless otherwise noted. Specifications at temperature are guaranteed by design
Note 2. Subject to thermal dissipation characteristics of the device
Note 3. When mounted according to JEDEC JEP149 and JESD51-12 for a two-layer PCB, θ
JA
= 24.1°C/W and θ
JC
= 2.7°C/W
Note 4. Guaranteed by design and characterization. Not production tested
Note 5. STR0 to STR5 current matching is the difference between any one string current and the average of all string currents divided
by the average of all string currents
Note 6. The MSL1060 selects the active string (STR0 through STR5) with the lowest voltage to control the boost regulator voltage
Atmel LED Driver-MSL1060
6-string PWM LED Driver with Digitally Compensated, 1.1MHz,
48V Boost Regulator and ±1.5% LED String Current Balance