Datasheet

MAX16804
High-Voltage, 350mA LED Driver with
Analog and PWM Dimming Control
_______________________________________________________________________________________ 3
Note 1: All devices are 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 a resistor from OUT to CS+. Connect R
SENSE
= 0.56Ω from CS+ to CS-. Set V
IN
= V
OUT
+3V (record V
OUT
as
V
OUT1
). Reduce V
IN
until V
OUT
= 0.97 x V
OUT1
(record as V
IN2
and V
OUT2
). ΔV
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 CS+.
Note 6: Thermal shutdown does not function if the output of the 5V reference is shorted to ground. Shorting V5 to GND disables the
output.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN
= 12V, C
V5
= 0.1µF, I
V5
= 0, CS- = GND, R
SENSE
= 0.56Ω (see the Typical Operating Circuit ), V
DIM
= 4V, T
A
= T
J
= -40°C
to +125°C, unless otherwise noted. Typical values are at T
A
= T
J
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
THERMAL PROTECTION
Thermal-Shutdown Temperature T
J
(
SHDN
)
+155 °C
Thermal-Shutdown Hysteresis 23 °C
+5V REGULATOR
Output Voltage Regulation V5 0 ≤ I
V5
≤ 2mA 4.8 5.1 5.4 V
V5 Short-Circuit Current V5 = 0V (Note 6) 12 mA
Typical Operating Characteristics
(V
IN
= 12V, V
EN
= V
IN
, C
V5
= 0.1µF, I
V5
= 0, CS- = GND, R
SENSE
= 0.56Ω, connect OUT to CS+, V
DIM
= 4V, T
A
= +25°C, unless
otherwise noted.)
OUTPUT CURRENT
vs. TEMPERATURE
MAX16804 toc01
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
1109565 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
MAX16804 toc02
OUTPUT CURRENT (mA)
(V
CS+
- V
CS-
) (V)
320290230 26080 110 140 170 20050
0.194
0.195
0.196
0.197
0.198
0.199
0.200
0.201
0.202
0.203
0.193
20 350
V
IN
= 12V
OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX16804 toc03
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
14122 4 6 8 10
50
100
150
200
250
300
350
400
0
016
I
OUT
= 350mA
I
OUT
= 100mA