MAX16831 Datasheet, PDF (5/20 Pages) Maxim Integrated Products – High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control

High-Voltage, High-Power LED Driver with
Analog and PWM Dimming Control
ELECTRICAL CHARACTERISTICS (continued)
(V_CC = V_UVEN = 14V, C_REG1 = 1µF, C_REG2 = 1µF, C_CLMP = 0.1µF, R_T = 25kΩ, T_A = T_J = -40°C to +125°C, unless otherwise noted.
Typical specifications are at T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Hysteresis
T_SHDN Temperature rising
∆T_SHDN
+165
°C
20
°C
Note 1: Dropout voltage is defined as the input to output differential voltage at which the regulator output voltage drops 100mV below
the nominal output voltage.
Note 2: V_CLMPTH determines the voltage required to operate the current-sense amplifier. The DIM driver requires 2.5V for (V_CLMP - V_LO)
to drive the external MOSFET. V_HI is typically one diode drop above V_CLMP. A large capacitor connected to V_CLMP slows the
response of the LED current-sense circuitry, resulting in current overshoot. To ensure proper operation, connect a 0.1µF
capacitor from CLMP to LO.
Typical Operating Characteristics
(V_CC = V_UVEN = 14V, C_REG1 = 1µF, C_REG2 = 10µF, C_CLMP = 0.1µF, R_T = 25kΩ, R_CS = 0.1Ω, T_A = +25°C, unless otherwise noted.)
SHUTDOWN CURRENT
vs. TEMPERATURE
28
27
26
25
24
23
22
21
20
19
18
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
OPERATING CURRENT
vs. TEMPERATURE
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
-60 -40 -20
DGT AND DRV NOT
SWITCHING
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
VOLTAGE ACROSS LED CURRENT-SENSE
RESISTOR vs. SUPPLY VOLTAGE
120
110
100
90
80
70
60
50
40
30
20
10
0
0
10
20
30
40
SUPPLY VOLTAGE (V)
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