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Atmel LED Drivers-MSL3167/MSL3168
16-string, White LED Drivers with Adaptive Power Control,
Simple PWM Dimming Interface, and Fault Handling
PARAMETER
SYMBOL
CONDITIONS AND NOTES
MIN
TYP
MAX
UNIT
Input high voltage SDA, SCL, PWM
Input low voltage SDA, SCL, PWM
Input high voltage: EN
Input low voltage: EN
V IH
V IL
0.7 x
VDD
1.22
0.3 x
VDD
0.8
V
V
V
V
Output low voltage: SDA, FLTB
ILED regulation voltage
V OL
I SINK = 5mA
R ILED = 38.3k?
350
0.4
V
mV
FBO feedback output current
FBO feedback output current step size
V FBO ≤ VIN – 0.5V
0
1.1
365
μA
μA
STR0 thru STR15 sink current
STR0 to STR15 string sink
current maximum
R ILED = 38.3k?, ISTR = 0xF F, V STRn = 1V
R ILED = 25.5k?, ISTR = 0xFF (Note 1)
18
20
30
22
mA
mA
STR0 to STR15 string-off leakage current
10
μA
STR0 thru STR15 current
load regulation
R ILED = 38.3k?, ISTR = 0xFF,
FLDBKEN = 0, V STRn = 1V t o 5V
0.033
%/V
STR0 to STR15 current matching
ISTR = 0xFF, R ILED = 38.3k ?, V STRn = 1V
-5
5
%
STR0 to STR15 minimum headroom
V STR
R ILED = 38.3k?, ISTR = 0xF F
150
mV
STR0 to STR15 short circuit fault
detection threshold
STR0 thru STR15 current slew rate
Thermal shutdown temperature
SC REF
Current rising (Note 2)
Current falling (Note 2)
(Note 2)
8.4
200
8,000
135
V
mA/μs
°C
PARAMETER
SYMBOL
CONDITIONS AND NOTES
MIN
TYP
MAX
UNIT
AC ELECTRICAL CHARACTERISTICS
PWM frequency
PWM duty cycle
f PWM
0
50
100
kHz
%
I2C TIMING CHARACTERISTICS
SCL clock frequency
Bus timeout period
STOP to START condition bus free time
Repeated START condition hold time
Repeated START condition setup time
STOP condition set-up time
SDA data hold time
SDA data valid acknowledge time
SDA data valid time
1/t SCL
t ti m e o u t
t BUF
t H D :S TA
t S U :S TA
t S U :S TO P
t HD:DAT
t VD:ACK
t VD:DAT
Bus timeout disabled (Note 3)
OSCCTRL = 0x04
f OSC = 16MHz to 23MHz
(Note 4)
(Note 5)
0
0.5
0.26
0.26
0.26
0
0.05
0.05
30
600,000 / f OSC
1
0.45
0.45
MHz
ms
s
μs
μs
μs
μs
ns
μs
μs
Atmel LED Drivers-MSL3167/MSL3168
7
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