Typical operating characteristics (continued) – Rainbow Electronics MAX16822B User Manual
Page 4
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 ILED
60
55
50
45
40
35
30
25
20
15
10
5
0.950
1.00
1.05
1.10
0.90
0
65
1 LED
3 LEDs
5 LEDs 7 LEDs
9 LEDs11 LEDs13 LEDs
15 LEDs
QUIESCENT CURRENT
vs. V
IN
MAX16822A toc05
V
IN
(V)
QUIESCENT CURRENT (
μ
A)
60
55
45 50
15 20 25 30 35 40
5 10
50
100
150
200
250
300
350
400
450
500
0
0
65
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)
2.4
2.0
1.2
1.6
0.8
0.4
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)
110
95
80
65
50
35
20
5
-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
10
μs/div
I
LED
200mA/div
V
DIM
5V/div
0
0