MAX16803_09 Datasheet, PDF (3/11 Pages) Maxim Integrated Products – High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator

High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
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
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.
(V_IN = V_EN = +12V, T_A = +25°C, unless otherwise noted.)
Typical Operating Characteristics
OUTPUT CURRENT
vs. TEMPERATURE
450
400
ILOAD = 350mA
350
300
250
ILOAD = 200mA
200
150
ILOAD = 100mA
100
ILOAD = 35mA
50
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
(V_CS+ - V_CS-) vs. OUTPUT CURRENT
0.210
0.209 ^{VIN = 12V}
0.208
0.207
0.206
0.205
0.204
0.203
0.202
0.201
0.200
20 50 80 110 140 170 200 230 260 290 320 350
OUTPUT CURRENT (mA)
OUTPUT CURRENT
vs. INPUT VOLTAGE
400
350
300
250
200
150
100
50
0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
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