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ADD5203ACPZ-RL Fiches technique(PDF) 9 Page - Analog Devices

No de pièce ADD5203ACPZ-RL
Description  8-String,White LED Driver with SMBus and PWM Input for LCD Backlight Applications
Download  24 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

ADD5203ACPZ-RL Fiches technique(HTML) 9 Page - Analog Devices

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ADD5203
Rev. 0 | Page 9 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
94
92
90
88
86
84
82
80
78
510
15
20
INPUT VOLTAGE (V)
25
8 PARALLEL × 8 SERIES
10 PARALLEL × 8 SERIES
ILED = 20mA
BRIGHTNESS = 100%
fSW = 600kHz
Figure 4. Boost Converter Efficiency vs. Input Voltage
32
30
28
26
24
22
20
18
16
14
10
12
8
85
105
125
145
165
185
205
225
245
265
RSET (kΩ)
Figure 5. LED Current vs. RSET
20
15
10
5
0
0
10
20
30
40
50
60
70
80
90
100
PWM DUTY CYCLE (%)
Figure 6. LED Current vs. PWM Input Duty Cycle
25
0
5
10
15
20
02
225
200
175
150
125
100
75
50
25
SMBus BRIGHTNESS SETTING
50
Figure 7. LED Current vs. SMBus Brightness Setting
25
20
15
10
5
0
5
101520
INPUT VOLTAGE (V)
Figure 8. LED Current vs. Input Voltage (ILED = 20 mA)
VOUT
20V/DIV
VSW
20V/DIV
SHDN
3V/DIV
IL
1A/DIV
VIN = 15V
BRIGHTNESS = 100%
LEDs = 12 SERIES × 8 PARALLEL
Figure 9. Start-Up Waveforms (Brightness = 100%)


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