MAX16832A_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, R_SENSE = 0.3Ω, L = 220µH (connected between IN and CS). Typical values are at T_A = +25°C, unless otherwise
noted.)
NORMALIZED ILED CURRENT
vs. INPUT VOLTAGE
1.05
1.04
1.03
1.02
1.01
13 LEDs
1.00
1 LED ^{3 LEDs}
5 LEDs ⁷
LEDs
9
11 LEDs
LEDs
15 LEDs
0.99
0.98
0.97
0.96
0.95
0 5 10 15 20 25 30 35 40 45 50 55 60 65
VIN (V)
QUIESCENT CURRENT
vs. INPUT VOLTAGE
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 (10% DUTY CYCLE)
MAX16832A toc06
VIN = 48V
8 LEDs
ILED
200mA/div
1ms/div
0
VDIM
5V/div
0
PWM DIMMING
AT 200Hz (90% DUTY CYCLE )
MAX16822A toc07
PWM DIMMING
AT 20kHz (90% DUTY CYCLE)
MAX16832A toc08
ILED
200mA/div
ILED
200mA/div
0
VIN = 48V
8 LEDs
VDIM
5V/div
0
1ms/div
800
750
700
650
600
550
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)
10μs/div
0
VDIM
5V/div
VIN = 48V 0
8 LEDs
ILED
vs. TEMPERATURE
1.0
0.9
0.8
0.7
0.6
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 _______________________________________________________________________________________