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ADM8843 Arkusz danych(PDF) 6 Page - Analog Devices

Numer części ADM8843
Szczegółowy opis  4 White LED Backlight Driver
PDF  16 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

ADM8843 Arkusz danych(HTML) 6 Page - Analog Devices

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ADM8843
Rev. 0 | Page 6 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
5
10
15
20
25
30
35
10.75
RSET (kΩ)
4.75
6.75
12.75
14.75
8.75
Figure 3. ILED (mA) vs. RSET
TEMPERATURE (
°C)
–40
0
80
40
20.08
20.12
20.14
20.16
20.18
20.20
20.24
20.10
20.22
Figure 4. ILED (mA) Variation over Temperature (°C), VCC = 3.6 V
0
4
8
12
16
20
DUTY CYCLE (%)
0
20
60
100
80
40
Figure 5. ILED (mA) vs. PWM Dimming (Varying Duty Cycle),
Four LEDs Enabled, Frequency = 1 kHz
20.00
20.10
20.15
20.20
20.25
20.30
20.35
4.1
SUPPLY VOLTAGE (k
Ω)
2.6
3.1
4.6
5.6
3.6
5.1
–40
°C
+25
°C
+85
°C
20.05
Figure 6. ILED (mA) vs. Temperature (°C), Four LEDs Enabled
5
10
15
20
25
30
35
3.8
SUPPLY VOLTAGE (V)
2.6
3.0
4.6
5.4
3.4
5.0
4.2
Figure 7. ILED (mA) vs. Supply Voltage (V)
60
65
70
80
90
95
DUTY CYCLE (%)
040
60
80
70
50
85
90
100
10
20
30
75
Figure 8. LED Efficiency vs. Varying Duty Cycle of 1 kHz PWM Signal,
Four LEDs Enabled, 20 mA/LED



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