High-Power Synchronous HBLED
Drivers with Rapid Current Pulsing
ELECTRICAL CHARACTERISTICS (continued)
(V CC = 5V, V DD = V CC , T A = T J = -40°C to +125°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ENABLE INPUT (EN)
EN Input-Voltage High
EN rising
2.437
2.5
2.562
V
EN Input Hysteresis
0.28
V
EN Pullup Current
I EN
13.5
15
16.5
μA
THERMAL SHUTDOWN
Thermal Shutdown
Thermal-Shutdown Hysteresis
165
20
°C
°C
Note 1: All devices are 100% production tested at +25°C. Limits over temperature are guaranteed by design.
Note 2: Does not include an error due to finite error amplifier gain. See the Voltage-Error Amplifier section.
Typical Operating Characteristics
(V IN = 12V, V DD = V CC = 5V, T A = +25°C, unless otherwise noted.)
10
SUPPLY CURRENT (I Q ) vs. FREQUENCY
70
SUPPLY CURRENT vs. TEMPERATURE
5.5
V CC LOAD REGULATION vs. V IN
9
8
EXTERNAL CLOCK
NO DRIVER LOAD
65
5.4
5.3
7
6
5
V IN = 24V
V IN = 12V
60
55
5.2
5.1
5.0
V IN = 24V
V IN = 12V
4
4.9
3
2
1
0
V IN = 5V
50
45
40
V IN = 12V
C DH/DL = 22nF
4.8
4.7
4.6
4.5
V IN = 7V
100
300
500
700
900 1100 1300 1500
-40
-15
10
35
60
85
0
15 30 45 60 75 90 105 120 135 150
200
FREQUENCY (kHz)
DRIVER RISE TIME
vs. DRIVER LOAD CAPACITANCE
100
TEMPERATURE ( ° C)
DRIVER FALL TIME
vs. DRIVER LOAD CAPACITANCE
V CC LOAD CURRENT (mA)
HIGH-SIDE DRIVER (DH) SINK
AND SOURCE CURRENT
MAX16821A toc06
180
160
140
120
100
80
60
C LOAD = 22nF
V IN = 12V
2A/div
80
60
40
20
0
DH
DL
40
20
0
DL
DH
0
5
10
15
20
25
0
5
10
15
20
25
100ns/div
LOAD CAPACITANCE (nF)
LOAD CAPACITANCE (nF)
_______________________________________________________________________________________
5
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