Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX16803 User Manual
Page 3
MAX16803
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
_______________________________________________________________________________________
3
Note 1: All devices 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Resistors were added from OUT to CS+ to aid with the power dissipation during testing.
Note 3: Dropout is measured as follows:
Connect R
O
= 27Ω from OUT to CS+. Connect R
SENSE
= 0.58Ω from CS+ to CS-. Set V
IN
= +12V (record V
OUT
as V
OUT1
).
Reduce V
IN
until V
OUT
= 0.97 x V
OUT1
(record as V
IN2
and V
OUT2
). ∆V
DO
= V
IN2
- V
OUT2
.
Note 4: I
V5
= 0mA.
Note 5: t
ON
time includes the delay and the rise time needed for I
OUT
to reach 90% of its final value. t
OFF
time is the time needed
for I
OUT
to drop below 10%. See the Typical Operating Characteristics. t
ON
and t
OFF
are tested with 13Ω from OUT to CST.
Note 6: Current regulation varies with V5 load (see the Typical Operating Characteristics).
Note 7: Thermal shutdown does not function if the output of the 5V reference is shorted to ground.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN
= +12V, C
V5
= 0.1µF to GND, I
V5
= 0, V
CS-
= 0V, V
DIM
= +4V, connect R
SENSE
= 0.58Ω between CS+ and CS- (Note 1).
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
THERMAL OVERLOAD
Thermal-Shutdown Temperature
+155
°C
Thermal-Shutdown Hysteresis
23
°C
+5V REGULATOR
Output Voltage Regulation
V5
(Note 6)
5.0
5.27
5.5
V
V5 Short-Circuit Current
V5 = 0V (Note 7)
16
mA
Typical Operating Characteristics
(V
IN
= V
EN
= +12V, T
A
= +25°C, unless otherwise noted.)
OUTPUT CURRENT
vs. TEMPERATURE
MAX16803 toc01
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
110
95
65 80
-10 5
20 35 50
-25
50
100
150
200
250
300
350
400
450
0
-40
125
I
LOAD
= 350mA
I
LOAD
= 35mA
I
LOAD
= 200mA
I
LOAD
= 100mA
(V
CS+
- V
CS-
) vs. OUTPUT CURRENT
MAX16803 toc02
OUTPUT CURRENT (mA)
(V
CS+
- V
CS-
) (V)
320
290
230 260
80 110 140 170 200
50
0.201
0.202
0.203
0.204
0.205
0.206
0.207
0.208
0.209
0.210
0.200
20
350
V
IN
= 12V
OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX16803 toc03
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
35
30
5
10
15
20
25
50
100
150
200
250
300
350
400
0
0
40