Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX16823 User Manual
Page 3
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
_______________________________________________________________________________________
3
Note 1: All devices 100% production tested at T
J
= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Dropout is measured as follows: Connect a resistor from OUT_ to CS_. Connect R
CS_
= 2.85Ω from CS_ to GND.
Set V
IN
= V
OUT
+ 3V (record V
OUT
as V
OUTA
). Reduce V
IN
until V
OUT
= 0.97 x V
OUTA
(record as V
INB
and V
OUTB
).
VDO = V
INB
- V
OUTB
.
Note 3: Output current rise and fall times are measured with a 62Ω series resistor from OUT_ to CS_.
Note 4: Overtemperature protection does not function if the output of the 3.4V reference (REG) is shorted to ground.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CURRENT SENSE
Regulated CS_ Voltage
V
CS_
5mA ≤ I
OUT
_ ≤ 70mA
193
203
213
mV
Input Current (CS1, CS2, CS3)
Current out of CS_
+1.2
µA
OVERTEMPERATURE PROTECTION (Note 4)
Thermal Shutdown Temperature
155
°C
Thermal Shutdown Hysteresis
23
°C
3.4V REGULATOR (REG)
3.275
3.41
3.547
Output Voltage
V
REG
0 ≤ I
REG
≤ 4mA
3.221
3.38
3.547
V
REG Short-Circuit Current
V
REG
= 0V
13
mA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, C
REG
= 0.1µF, I
REG
= 0, C
LGC
= 15nF, V
DIM1
= V
DIM2
= V
DIM3
= 3.4V, R
CS_
= 2.85Ω from CS_ to GND, T
J
= T
A
= -40°C
to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Typical Operating Characteristics
(V
IN
= 12V, C
REG
= 0.1µF, I
REG
= 0, V
LGC
= unconnected, connect R
CS_
= 2.85Ω from CS_ to GND. Connect OUT_ to CS_ through
a resistor, T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
V
CS_
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
V
CS_
(V)
MAX16823 toc02
0
10
20
30
40
50
60
70
0.200
0.201
0.202
0.203
0.204
0.205
0.206
0.207
0.208
0.209
0.210
OUTPUT CURRENT vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
MAX16823 toc03
0
5
10
15
20
25
30
35
40
0
10
20
30
40
50
60
70
80
90
100
I
OUT
= 70mA
I
OUT
= 5mA
OUTPUT CURRENT vs. TEMPERATURE
TEMPERATURE (°C )
OUTPUT CURRENT (mA)
MAX16823 toc01
-40 -25 -10 5
20 35 50 65 80 95 110 125
0
10
20
30
40
50
60
70
80
90
100
I
LOAD
= 5mA
I
LOAD
= 35mA
I
LOAD
= 70mA