MAX16821A Datasheet, PDF (5/25 Pages) Maxim Integrated Products – High-Power Synchronous HBLED Drivers with Rapid Current Pulsing

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
ENABLE INPUT (EN)
EN Input-Voltage High
EN rising
2.437 2.5
EN Input Hysteresis
0.28
EN Pullup Current
I_EN
THERMAL SHUTDOWN
13.5
15
Thermal Shutdown
165
Thermal-Shutdown Hysteresis
20
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.
MAX
2.562
16.5
UNITS
V
V
µA
°C
°C
Typical Operating Characteristics
(V_IN = 12V, V_DD = V_CC = 5V, T_A = +25°C, unless otherwise noted.)
SUPPLY CURRENT (I_Q) vs. FREQUENCY
10
9
EXTERNAL CLOCK
NO DRIVER LOAD
8
7 _{VIN = 24V}
6
5
4
3
V_IN = 5V
V_IN = 12V
2
1
0
100 300 500 700 900 1100 1300 1500
FREQUENCY (kHz)
SUPPLY CURRENT vs. TEMPERATURE
70
65
60
55
50
45
40
-40
V_IN = 12V
C_DH/DL = 22nF
-15 10
35
60
85
TEMPERATURE (°C)
V_CC LOAD REGULATION vs. V_IN
5.5
5.4
5.3
5.2
V_IN = 24V
5.1
V_IN = 12V
5.0
4.9
4.8
V_IN = 7V
4.7
4.6
4.5
0 15 30 45 60 75 90 105 120 135 150
V_CC LOAD CURRENT (mA)
DRIVER RISE TIME
vs. DRIVER LOAD CAPACITANCE
200
180
160
140
120
100
80
60
DH
40
20
DL
0
0
5
10
15
20
25
LOAD CAPACITANCE (nF)
DRIVER FALL TIME
vs. DRIVER LOAD CAPACITANCE
100
80
60
40
DL
DH
20
0
0
5
10
15
20
25
LOAD CAPACITANCE (nF)
HIGH-SIDE DRIVER (DH) SINK
AND SOURCE CURRENT
MAX16821A toc06
C_LOAD = 22nF
V_IN = 12V
2A/div
100ns/div
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