Datasheet

MAX16822A/MAX16822B
2MHz, High-Brightness LED Drivers with
Integrated MOSFET and High-Side Current Sense
4 _______________________________________________________________________________________
NORMALIZED I
LED
vs. V
IN
MAX16822A toc04
V
IN
(V)
NORMALIZED I
LED
60555045403530252015105
0.950
1.00
1.05
1.10
0.90
065
1 LED
3 LEDs
5 LEDs 7 LEDs
9 LEDs
11 LEDs
13 LEDs
15 LEDs
QUIESCENT CURRENT
vs. V
IN
MAX16822A toc05
V
IN
(V)
QUIESCENT CURRENT (μA)
605545 5015 20 25 30 35 405 10
50
100
150
200
250
300
350
400
450
500
0
065
V
DIM
= 0V
PWM DIMMING
AT 200Hz DUTY CYCLE (10%)
MAX16822A toc06
1ms/div
I
LED
200mA/div
0
0
V
DIM
5V/div
V
IN
= 48V
8 LEDs
Typical Operating Characteristics (continued)
(V
IN
= V
DIM
= 48V, C
VCC
= 1µF, R
SENSE
= 0.62Ω, L = 220µH (connected between IN and CS). Typical values are at T
A
= +25°C,
unless otherwise noted.)
LED CURRENT
vs. V
TEMP_I
MAX16822A toc09
V
TEMP_I
(V)
LED CURRENT (mA)
2.42.01.2 1.60.80.4
50
100
150
200
250
300
350
400
450
500
0
0 2.8
I
LED
vs. TEMPERATURE
MAX16822A toc10
TEMPERATURE (°C)
I
LED
(A)
1109580655035205-10-25
0.1
0.2
0.3
0.4
0.5
0
-40 125
V
IN
= 48V
PWM DIMMING
AT 200Hz DUTY CYCLE (90%)
MAX16822A toc07
1ms/div
I
LED
200mA/div
V
DIM
5V/div
V
IN
= 48V
8 LEDs
0
0
PWM DIMMING
AT 20kHz DUTY CYCLE (90%)
MAX16822A toc08
10μs/div
I
LED
200mA/div
V
DIM
5V/div
0
0