MAX16814_15 Datasheet, PDF (5/25 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
(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.)
SWITCHING WAVEFORM AT 5kHz
(50% DUTY CYCLE) DIMMING
MAX16814 toc01
40Fs/div
VLX
10V/div
0V
IOUT1
100mA/div
0A
VOUT
10V/div
FIGURE 2 _0V
SUPPLY CURRENT vs. SUPPLY VOLTAGE
3.8
CNDRV = 13pF
3.6
TA = +125NC
3.4
3.2
TA = +25NC
3.0
TA = -40NC
2.8
2.6
2.4
5
10 15 20 25 30 35 40 45
VIN (V)
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
4.4
CNDRV = 13pF
4.2
4.0
3.8
3.6
SWITCHING FREQUENCY
vs. TEMPERATURE
310
308
306
304
302
300
298
VSETI vs. TEMPERATURE
1.240
1.236
1.232
1.228
3.4
3.2
3.0
200 400 600 800 1000 1200 1400 1600 1800 2000
f_SW (kHz)
296
294
292
290
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
1.224
1.220
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
VSETI vs. PROGRAMMED CURRENT
1.234
1.233
1.232
1.231
1.230
1.229
EN THRESHOLD VOLTAGE
vs. TEMPERATURE
1.30
1.25
V_EN RISING
1.20
VEN FALLING
1.15
EN LEAKAGE CURRENT
vs. TEMPERATURE
150
VEN = 2.5V
120
90
60
30
1.228
20
46
72
98 124 150
LED STRING CURRENT (mA)
1.10
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
0
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
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