MAX16839 Datasheet, PDF (5/11 Pages) Maxim Integrated Products – High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect

High-Voltage, Linear High-Brightness LED
Driver with Open-LED Fault Detect
Typical Operating Characteristics (continued)
(VIN = 12V, RCS = 4.07I from CS to GND, CFLTS = 0.1FF, CIN = 0.1FF, DIM input unconnected, TA = +25NC, unless otherwise noted.
Typical values are at T_A = +25NC.)
LED CURRENT RISE/FALL TIMES
MAX16839 toc08
V_DIM
2V/div
FLTS DISCHARGE
MAX16839 toc09
V_IN IS TURNED OFF _VIN
5V/div
LEAKAGE CURRENT vs. TEMPERATURE
50
VIN = 0V
V_FLTS = 8V
40
20Fs/div
0V
I_LED
50mA/div
0
1s/div
0V
VFLTS
5V/div
0V
30
20
10
0
-10
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
FAULT ACTIVATION THRESHOLD
vs. TEMPERATURE
7.40
7.39
7.38
7.37
7.36
7.35
7.34
7.33
7.32
7.31
7.30
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
ILED RESPONSE TO SUPPLY CHOPPING
MAX16839 toc12
4ms/div
V_IN
5V/div
ILED
20mA/div
0
LED RISE TIME DELAY
(SUPPLY CHOPPING)
MAX16839 toc13
FAULT ACTIVATION THRESHOLD
AND OPEN-LED BLANKING
MAX16839 toc14
1Fs/div
V_IN
5V/div
0V
ILED
20mA/div
0
20Fs/div
V_IN
2V/div
V_FLTS
2V/div
0V
_______________________________________________________________________________________   5