
High-Power Synchronous HBLED
Drivers with Rapid Current Pulsing
Typical Operating Characteristics (continued)
(V IN = 12V, V DD = V CC = 5V, T A = +25°C, unless otherwise noted.)
LOW-SIDE DRIVER (DL) SINK
AND SOURCE CURRENT
MAX16821A toc07
C LOAD = 22nF
V IN = 12V
100ns/div
3A/div
HIGH-SIDE DRIVER (DH) RISE TIME
MAX16821A toc08
V IN = 12V
DH RISING
40ns/div
2V/div
HIGH-SIDE DRIVER (DH) FALL TIME
MAX16821A toc09
C LOAD = 22nF
V IN = 12V
40ns/div
2V/div
LOW-SIDE DRIVER (DL) RISE TIME
MAX16821A toc10
C LOAD = 22nF
V IN = 12V
2V/div
LOW-SIDE DRIVER (DL) FALL TIME
MAX16821A toc11
C LOAD = 22nF
V IN = 12V
2V/div
10,000
1000
V IN = 12V
FREQUENCY vs. R T
100
260
40ns/div
FREQUENCY vs. TEMPERATURE
40ns/div
SYNC, CLKOUT, AND DH WAVEFORMS
MAX16821A toc14
30 70 110 150 190 230 270 310 350 390 430 470 510 550
R T (k ? )
SYNC, CLKOUT, AND DL WAVEFORMS
MAX16821A toc15
258
256
254
252
250
248
V IN = 12V
MODE = SGND
RT/SYNC
5V/div
0V
CLKOUT
5V/div
0V
MODE = V CC
RT/SYNC
5V/div
0V
CLKOUT
5V/div
0V
246
244
242
240
DH
5V/div
0V
DL
5V/div
0V
0
5
10 15 20 25
TEMPERATURE ( ° C)
30
35
1 μ s/div
1 μ s/div
6
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