ADM8843(Rev0) 查看數據表（PDF） - Analog Devices
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ADM8843 Datasheet PDF : 16 Pages
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ADM8843
TYPICAL PERFORMANCE CHARACTERISTICS
35
30
25
20
15
10
5
4.75
6.75
8.75
10.75
RSET (kΩ)
12.75
14.75
Figure 3. ILED (mA) vs. RSET
20.24
20.22
20.20
20.18
20.16
20.14
20.12
20.10
20.08
–40
0
40
80
TEMPERATURE (°C)
Figure 4. ILED (mA) Variation over Temperature (°C), VCC = 3.6 V
20
16
12
8
4
0
0
20
40
60
80
100
DUTY CYCLE (%)
Figure 5. ILED (mA) vs. PWM Dimming (Varying Duty Cycle),
Four LEDs Enabled, Frequency = 1 kHz
20.35
20.30
20.25
–40°C
20.20
20.15
20.10
+25°C
+85°C
20.05
20.00
2.6
3.1
3.6
4.1
4.6
5.1
5.6
SUPPLY VOLTAGE (kΩ)
Figure 6. ILED (mA) vs. Temperature (°C), Four LEDs Enabled
35
30
25
20
15
10
5
2.6
3.0
3.4
3.8
4.2
4.6
5.0
5.4
SUPPLY VOLTAGE (V)
Figure 7. ILED (mA) vs. Supply Voltage (V)
95
90
85
80
75
70
65
60
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
Figure 8. LED Efficiency vs. Varying Duty Cycle of 1 kHz PWM Signal,
Four LEDs Enabled, 20 mA/LED
Rev. 0 | Page 6 of 16
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