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High-Voltage, 350mA LED Driver with
Analog and PWM Dimming Control
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V EN = 12V, C V5 = 0.1μF, I V5 = 0, CS- = GND, R SENSE = 0.56 Ω (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
Thermal-Shutdown Hysteresis
T J(SHDN)
+155
23
°C
°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
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 = 0.56 Ω 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 ). Δ 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 13 Ω 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.
Typical Operating Characteristics
(V IN = 12V, V EN = V IN , C V5 = 0.1μF, I V5 = 0, CS- = GND, R SENSE = 0.56 Ω , connect OUT to CS+, V DIM = 4V, T A = +25°C, unless
otherwise noted.)
OUTPUT CURRENT
OUTPUT CURRENT
450
vs. TEMPERATURE
0.203
(V CS+ - V CS- ) vs. OUTPUT CURRENT
400
vs. INPUT VOLTAGE
400
350
300
250
200
150
100
50
I LOAD = 350mA
I LOAD = 200mA
I LOAD = 100mA
I LOAD = 35mA
0.202
0.201
0.200
0.199
0.198
0.197
0.196
0.195
0.194
V IN = 12V
350
300
250
200
150
100
50
I OUT = 350mA
I OUT = 100mA
0
0.193
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
20 50 80 110 140 170 200 230 260 290 320 350
0
2
4
6
8
10
12
14
16
TEMPERATURE ( ° C)
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
_______________________________________________________________________________________
3
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