Datasheet

7
Atmel MSL3080 Datasheet
8 String 60mA LED Driver with Integrated Boost Controller
5.0 Typical Operating Characteristics
(Typical Operating Circuit, unless otherwise stated, TA = +25°C, unless otherwise noted)
MSL3050/MSL3060/MSL3080 Datasheet
Preliminary
MSL3050/60/80 preliminary datasheet revision 0.1 Page 6 of 24
© Atmel Inc., 2011. All rights reserved.
Typical Operating Characteristics (Typical Operating Circuit, unless otherwise stated)
BOOST REGULATOR EFFICIENCY vs.
OUTPUT CURRENT
50
55
60
65
70
75
80
85
90
95
100
0 200 400 600 800 1,000
OUTPUT CURRENT (mA)
EFFICIENCY (%
)
V
PWR
= 12V
V
LED

37V
f
BOOST
= 625kHz
STR
n
CURRENT vs. R
IS ET
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
10 100 1000
R
ISET
(k

)
STRn CURRENT (m
A
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.01
0.1
1
10
100
1000
10000
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
V
IN
(V)
I
IN
(µA)
EN = 0
EN = 1
sleep = slpPwrSv = 1
EN = 1
sleep = slpPwrSv = 0
BOOS T NOT SW ITCHING
START-UP WAVEFORMS
CH1 = V
EN
, CH2 = V
LED
, CH3 = V
STRx
, CH4 = I
PWR
MSL3050/MSL3060/MSL3080 Datasheet
Preliminary
MSL3050/60/80 preliminary datasheet revision 0.1 Page 7 of 24
© Atmel Inc., 2011. All rights reserved.
START-UP WAVEFORMS (ZOOM)
CH1 = V
EN
, CH2 = V
LED
, CH3 = V
STRx
, CH4 = I
PWR
AUTO CALIBRATION
CH2 = V
LED
, CH3 = V
STRx
BOOST WAVEFORMS
10% LED DUTY CYCLE
CH1 = V
LED
, CH2 = V
GATE
, CH3 = I
INDUCTOR
BOOST WAVEFORMS
100% LED DUTY CYCLE
CH1 = V
LED
, CH2 = V
GATE
, CH3 = I
INDUCTOR
0.01
0.1
1
10
100
1000
10000
100000
1000000
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
I
IN
(µA)
V
IN
(V)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
EN = 0
EN = 1
sleep = slpPwrSv = 1
EN = 1
sleep = slpPwrSv = 0
BOOST NOT SWITCHING