MAX16814_15 Datasheet, PDF (6/25 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.)
VCC LINE REGULATION
5.08
5.06
5.04
TA = +125NC
TA = +25NC
5.02
5.00
TA = -40NC
4.98
4.96
5
10 15
20 25
VIN (V)
30 35 40
VCC LOAD REGULATION
5.10
5.08
5.06
T_A = +125NC
5.04
5.02
TA = +25NC
5.00
4.98
4.96
4.94
TA = -40NC
4.92
4.90
0
20
40
60
80
IVCC (mA)
SWITCHING FREQUENCY vs. 1/RT
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.02 0.06 0.10 0.14 0.18 0.22 0.26 0.30
1/RT (mS)
STARTUP WAVEFORM WITH
DIM ON PULSE WIDTH < tSW
MAX16814 toc12
V_IN
20V/div
0V
V_DIM
5V/div
0V
I_{OUT_}
100mA/div
0A
40ms/div
V_LED
20V/div
0V
STARTUP WAVEFORM WITH DIM
ON PULSE WIDTH = 10t_SW
MAX16814 toc13
VIN
20V/div
0V
V_DIM
5V/div
0V
IOUT1
100mA/div
0A
V_LED
10V/div
40ms/div
FIGURE 2 _0V
STARTUP WAVEFORM WITH DIM
CONTINUOUSLY ON
MAX16814 toc14
VIN
20V/div
0V
V_DIM
5V/div
0V
IOUT1
100mA/div
0A
V_LED
10V/div
40ms/div
FIGURE 2 _0V
MOSFET DRIVER ON-RESISTANCE
vs. TEMPERATURE
1.5
1.3
pMOS
1.1
0.9
nMOS
0.7
0.5
-50 -25
0 25 50 75 100 125
TEMPERATURE (NC)
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