MAX16812 Datasheet, PDF (6/21 Pages) Maxim Integrated Products – Integrated High-Voltage LED Driver with Analog and PWM Dimming Control

Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
Typical Operating Characteristics (continued)
(V_IN = V_EN = 12V, C_{L_REG} = 3.3µF, C_{H_REG} = 1µF, V_TGRM = 0V, T_A = +25°C, unless otherwise noted.)
EN UVLO THRESHOLD
vs. TEMPERATURE
1.50
1.45 ^{VEN FALLING}
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
0
V_{L_REG} vs. I_{L_REG}
T_A = +125°C
T_A = +25°C
T_A = -40°C
V_IN = 7.5V
2 4 6 8 10 12 14 16 18 20
I_{L_REG} (mA)
OSCILLATOR FREQUENCY
vs. TEMPERATURE
600
RT = 2MΩ
500
400
RT = 180kΩ
300
200
RT = 50kΩ
100
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
OSCILLATOR FREQUENCY vs. RT
600
V_{H_REG} THRESHOLD
vs. TEMPERATURE
4.2
500
4.1
4.0
400
3.9
300
3.8
200
100
0
0.01
0.1
1
10
RT (MΩ)
3.7
3.6
3.5
3.4
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V_{H_REG} vs. I_{H_REG}
5.00
4.95
(V_HV - V_LV) = 6V
V_IN = 12V
4.90
4.85
4.80
4.75
4.70
4.65
4.60
4.55
4.50
0
V_{H_REG} IS MEASURED
WITH RESPECT TO V_LV
0.5 1.0 1.5 2.0 2.5 3.0
I_{H_REG} (mA)
V_{H_REG} vs. TEMPERATURE
5.2
5.1
(V_HV - V_LV) = 21V
I_LOAD = 3mA
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
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