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MAX16819 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part No. MAX16819
Description  2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX16819 Datasheet(HTML) 4 Page - Maxim Integrated Products

   
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(VIN = VDIM = 12V, CVCC = 1µF, RSENSE = 0.5Ω connected between IN and CSN. Typical values at TA = +25°C, unless otherwise
noted.)
DRV SWITCHING FREQUENCY
vs. VIN
VIN (V)
24
20
16
12
8
100
200
300
400
600
500
700
800
900
1000
1100
1200
1300
1400
1500
0
4
28
L = 47µH
LED 5
LED 4
LED 3
LED 1
LED 2
LED CURRENT VARIATION vs. VIN
VIN (V)
25
20
10
15
-1.5
-1.0
-0.5
0
1.0
0.5
1.5
2.0
-2.0
5
30
LED 5
LED 4
LED 3
LED 2
LED 1
ILED(NOMINAL) = 400mA
L = 47µH
VCC vs. VIN
VIN (V)
25.0
22.5
17.5 20.0
10.0 12.5 15.0
7.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
4.5
5.0
27.5
ILED = 0
VCC vs. TEMPERATURE
TEMPERATURE (°C)
110
95
65 80
-10 5 20 35 50
-25
5.31
5.32
5.33
5.34
5.35
5.36
5.37
5.38
5.39
5.40
5.30
-40
125
VIN = 24V
VIN = 12V
VDIM = 0V
SUPPLY CURRENT vs. VIN
VIN (V)
24.5
12.5
20.5
16.5
8.5
50
100
150
200
250
300
0
4.5
28.5
VDIM = 0V
PWM DIMMING AT 200Hz
(10% DUTY CYCLE)
MAX16819 toc07
1ms/div
VDIM
2V/div
0V
0A
ILED
200mA/div
VIN = 12V, L = 47µH,
1 LED MAX16819
EFFICIENCY vs. VIN
VIN (V)
25
20
10
15
65
70
75
80
90
85
95
100
60
5
30
LED 5
LED 4
L = 47µH
PWM DIMMING AT 200Hz
(90% DUTY CYCLE)
MAX16819 toc08
1ms/div
VDIM
2V/div
0V
0A
ILED
200mA/div
VIN = 12V, L = 47µH,
1 LED MAX16819
MAX16819/MAX16820
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
Maxim Integrated │ 4
www.maximintegrated.com
Typical Operating Characteristics


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