MAX16818_09 Datasheet, PDF (5/25 Pages) Maxim Integrated Products – 1.5MHz, 30A High-Efficiency, LED Driver with Rapid LED Current Pulsing

1.5MHz, 30A High-Efficiency, LED Driver
with Rapid LED Current Pulsing
(T_A = +25°C, using Figure 5, unless otherwise noted.)
Typical Operating Characteristics
SUPPLY CURRENT (I_Q) vs. FREQUENCY
60
EXTERNAL CLOCK
NO DRIVER LOAD
50
V_IN = 24V
40
30
V_IN = 12V
20
V_IN = 5V
10
0
100 300 500 700 900 1100 1300 1500
FREQUENCY (kHz)
HICCUP CURRENT LIMIT vs. R_EXT
26.0
25.5
25.0
24.5
24.0
V_IN = 12V
23.5 ^{fSW = 250kHz}
R1 = 1mΩ
V_OUT = 1.5V
23.0
0
4
8
12
16
20
R_EXT (MΩ)
DRIVER FALL TIME
vs. DRIVER LOAD CAPACITANCE
100
V_IN = 12V
f_SW = 250kHz
80
SUPPLY CURRENT vs. TEMPERATURE
70
68
66
64
62 VIN = 12V
f_SW = 250kHz
C_DL/C_DH = 22nF
60
-40 -15
10
35
60
85
TEMPERATURE (°C)
V_CC LOAD REGULATION
vs. INPUT VOLTAGE
5.25
5.15
V_IN = 24V
5.05
V_IN = 12V
4.95
V_IN = 5V
4.85
4.75
0
25 50 75 100 125 150
V_CC LOAD CURRENT (mA)
HIGH-SIDE DRIVER (DH) SINK
AND SOURCE CURRENT
MAX16818 toc08
C_LOAD = 22nF
V_IN = 12V
CURRENT-SENSE THRESHOLD
vs. OUTPUT VOLTAGE
29.0
28.5
28.0
27.5
27.0
26.5
V_IN = 12V
f_SW = 250kHz
26.0
0
1
2
3
4
5
V_OUT (V)
DRIVER RISE TIME
vs. DRIVER LOAD CAPACITANCE
100
V_IN = 12V
f_SW = 250kHz
80
60
DL
40
DH
20
0
1
6
11
16
21
CAPACITANCE (nF)
LOW-SIDE DRIVER (DL) SINK
AND SOURCE CURRENT
MAX16818 toc09
C_LOAD = 22nF
V_IN = 12V
60
DL
40
DH
20
2A/div
3A/div
0
1
6
11
16
21
CAPACITANCE (nF)
100ns/div
100ns/div
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