MAX16838_11 Datasheet, PDF (7/21 Pages) Maxim Integrated Products – Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

Integrated, 2-Channel, High-Brightness LED Driver
with High-Voltage Boost and SEPIC Controller
Typical Operating Characteristics (continued)
(VIN = VEN = 12V, RRT = 12.2kI, RISET = 15kI, CVCC = 1FF, VCC = VDRV = VCFB, VDRAIN = VCOMP = VOUT_, FLT = unconnected,
VOV = VCS = VLEDGND = VDIM = VPGND = VSGND = 0V, VGATE = VNDRV, TA = +25NC, unless otherwise noted.)
DRV LINE REGULATION
5.010
5.005
5.000
4.995
TA = +125°C TA = +25°C
4.990
4.985
4.980
TA = -40°C
4.975
0
10
20
30
40
50
INPUT VOLTAGE (V)
FREQUENCY vs. RRT
2.5
VIN = 12V
2.0
1.5
1.0
0.5
0
0 4 8 12 16 20 24 28 32 36 40
RRT (kI)
LED SWITCHING WITH DIM AT 200Hz
(50% DUTY CYCLE)
MAX16838 toc13
I_OUT1
10mA/div
0A
IOUT2
VDIM
100mA/div
0A
5V/div
0V
2ms/div
DRV LOAD REGULATION
5.010
5.005
TA = +125°C
5.000
4.995
4.990
TA = +25°C
4.985
4.980
TA = -40°C
4.975
4.970
4.965
0
VIN = 12V
5 10 15 20 25 30
LOAD (mA)
LODIM MODE RESPONSE
MAX16838 toc12
V_IN
VDIM
IOUT_
VLED_
10V/div
0V
5V/div
0V
100mA/div
0A
20V/div
DIM ON-TIME < 5 x fSW 0V
20ms/div
ILED vs. RISET
150
140
V_IN = 12V
130
120
110
100
90
80
70
60
50
40
30
20
10
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75
RISET (kI)
_______________________________________________________________________________________   7