Datasheet

12 Atmel LED Drivers-MSL1061/MSL1064
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 12) 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
EN logic input series resistance
Between EN input package pin and internal
Zener clamp
10.5 kΩ
EN logic input Zener clamp 5.8 V
SCL, SDA, AD0,
PWM logic high input voltage
2 V
SCL, SDA, AD0,
PWM logic low input voltage
0.9 V
SDA, SCL, AD0 input capacitance 10 pF
SDA output low voltage Sinking 6mA 0.4 V
FLTB output low voltage Sinking 1mA 0.1 0.2 V
IADJ, FLTB, PWM, SCL, SDA,
AD0 leakage current
10 µA
PARAMETER CONDITIONS AND NOTES MIN TYP MAX UNIT
AC ELECTRICAL CHARACTERISTICS
PWM input frequency
INTPWM bit D3=0 in control register to select
external PWM input to be used for direct LED
string dimming control
0 50 kHz
PWM input duty ratio 0 100 %
PWM input minimum string on time 14 µs
PWM input minimum string off time 3.2 µs
PWM input frequency, external PWM clock mode INTPWM bit D3=1, EXTCLK bit D2=1 in
control register to select external PWM
input to be used as clock for internal PWM
dimming control
0 12 MHz
PWM input duty ratio, external PWM clock mode 30 70 %
PWM frequency (internal oscillator)
R4 = 115kΩ ±1%, INTPWM bit D3=1,
EXTCLK bit D2=0 in control register to select
internal oscillator to be used as clock for
internal PWM dimming control
9 11 12 MHz
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