MAX16822A Datasheet, PDF (3/10 Pages) Maxim Integrated Products – 2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense

2MHz, High-Brightness LED Drivers with
Integrated MOSFET and High-Side Current Sense
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = +24V, V_DIM = V_IN, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
INTERNAL MOSFET
SYMBOL
CONDITIONS
MIN TYP
Drain-to-Source Resistance
LX Leakage Current
DIM INPUT
DIM Input-Voltage High
DIM Input-Voltage Low
DIM Turn-On Time
DIM Input Leakage High
DIM Input Leakage Low
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
R_DSON
I_{LX_LEAK}
V_IN = V_DIM = 24V, V_CS = 23.9V,
I_LX = 350mA
V_IN = V_DIM = 6.0V, V_CS = 5.9V,
I_LX = 350mA
V_DIM = 0V, V_LX = 65V
V_IH
V_IL
t_{DIM_ON}
V_IN - V_CS = 100mV
V_CS - V_IN = 100mV
V_DIM rising edge to V_LX < 0.5V_IN
V_DIM = V_IN
V_DIM = 0V
Temperature rising
0.85
1
2.8
200
-3
165
Thermal-Shutdown Threshold
Hsysteresis
10
THERMAL FOLDBACK
Thermal-Foldback Enable
Threshold Voltage
V_{TFBON_THR} V_DIM = 5V
1.9
2.0
Thermal-Foldback Slope
TEMP_I Output Bias Current
FB_SLOPE
I_{TEMP_I}
V_DIM = 5V
0.75
25
26.5
MAX
1.7
2
10
0.6
15
0
2.12
28
UNITS


μA
V
V
ns
μA
μA
°C
°C
V
1/V
μA
Typical Operating Characteristics
(V_IN = V_DIM = 48V, C_VCC = 1µF, R_SENSE = 0.62Ω, L = 220µH (connected between IN and CS). Typical values are at T_A = +25°C,
unless otherwise noted.)
EFFICIENCY
vs. VIN
100
7 LEDs9 ^{LEDs 11 LEDs13 LEDs 15 LEDs}
5 LEDs
95 _{3 LEDs}
90
85
1 LED
80
75
70
5
15 25 35 45 55 65
VIN (V)
100
90
80
70
60
50
40
30
20
10
0
5
DUTY CYCLE
vs. VIN
11 LEDs
13 LEDs ^{15 LEDs}
1 LED
7 LEDs 9 LEDs
5 LEDs
3 LEDs
15 25 35 45 55 65
VIN (V)
FREQUENCY
vs. VIN
100
90
15 LEDs
13 LEDs
80
11 LEDs
70
9 LEDs
60
7 LEDs
50
5 LEDs
40
3 LEDs
30
1 LED
20
10
0
5 15 25 35 45 55 65
VIN (V)
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