MAX16814_15 Datasheet, PDF (7/25 Pages) Maxim Integrated Products – Integrated, 4-Channel, High-Brightness LED Driver with High-Voltage DC-DC Controller

MAX16814
Integrated, 4-Channel, High-Brightness LED
Driver with High-Voltage DC-DC Controller
Typical Operating Characteristics (continued)
(VIN = VEN = 12V, fSW = 300kHz, RSETI = 15kI, CVCC = 1FF, VCC = VDRV, NDRV = COMP = OUT_ = unconnected, VOVP = VCS =
VLEDGND = VDIM = VPGND = VSGND = 0V, load = 4 strings of 7 white LEDs, TA = +25NC, unless otherwise noted.)
LED CURRENT SWITCHING WITH DIM
AT 5kHz AND 50% DUTY CYCLE
MAX16814 toc16
FIGURE 2
IOUT1
100mA/div
0A
IOUT2
100mA/div
0A
IOUT3
100mA/div
0A
100Fs/div
IOUT4
100mA/div
0A
OUT_ CURRENT vs. 1/RSETI
160
140
120
100
80
60
40
LED CURRENT RISING AND FALLING
WAVEFORM
MAX16814 toc17
V_DIM
5V/div
0V
I_LED
50mA/div
0A
FIGURE 2
4Fs/div
COMP LEAKAGE CURRENT
vs. TEMPERATURE
1.0
VDIM = 0V
0.8
0.6
VCOMP = 4.5V
0.4
VCOMP = 0.5V
0.2
20
0.010 0.025 0.040 0.055 0.070 0.085 0.100
1/RSETI (mS)
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
OUT_ LEAKAGE CURRENT
vs. TEMPERATURE
100
VDIM = 0V
V_OUT = 40V
10
1
0.1
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
OVP LEAKAGE CURRENT
vs. TEMPERATURE
2.0
1.8 VOVP = 1.25V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
RSDT LEAKAGE CURRENT
vs. TEMPERATURE
250
200
V_RSDT = 0.5V
150
100
VRSDT = 2.5V
50
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
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