MAX16822A_10 Datasheet, PDF (4/10 Pages) Maxim Integrated Products – 2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense

2MHz, High-Brightness LED Drivers with
Integrated MOSFET and High-Side Current Sense
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.)
NORMALIZED ILED
vs. VIN
1.10
1.05
1.00
0.950
5 LEDs 7
3 LEDs
LEDs
9
LEDs11
LEDs13
LEDs
15
LEDs
1 LED
0.90
0 5 10 15 20 25 30 35 40 45 50 55 60 65
VIN (V)
QUIESCENT CURRENT
vs. VIN
500
450
400
350
300
250
200
150
100
50
VDIM = 0V
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65
VIN (V)
PWM DIMMING
AT 200Hz DUTY CYCLE (10%)
MAX16822A toc06
1ms/div
ILED
200mA/div
0
VDIM
5V/div
0
VIN = 48V
8 LEDs
PWM DIMMING
AT 200Hz DUTY CYCLE (90%)
MAX16822A toc07
PWM DIMMING
AT 20kHz DUTY CYCLE (90%)
MAX16822A toc08
ILED
200mA/div
ILED
200mA/div
1ms/div
0
VDIM
5V/div
0
VIN = 48V
8 LEDs
10μs/div
0
VDIM
5V/div
0
500
450
400
350
300
250
200
150
100
50
0
0
LED CURRENT
vs. VTEMP_I
0.4 0.8 1.2 1.6 2.0 2.4 2.8
VTEMP_I (V)
ILED
vs. TEMPERATURE
0.5
0.4
0.3
0.2
0.1
VIN = 48V
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4 _______________________________________________________________________________________