ADM8845(RevD) 데이터 시트보기 (PDF) - Analog Devices
부품명
상세내역
제조사
ADM8845 Datasheet PDF : 18 Pages
| |||
Data Sheet
20
16
12
8
4
0
0
20
40
60
80
100
DUTY CYCLE (%)
Figure 9. LED Current vs. PWM Dimming (Varying Duty Cycle),
Six LEDs Enabled, Frequency = 1 kHz
300
250
200
20mA/LED
150
15mA/LED
100
50
0
2.6
3.0
3.4
3.8
4.2
4.6
5.0
5.4
SUPPLY VOLTAGE (V)
Figure 10. Supply Current ICC vs. Supply Voltage,
Six LEDs Enabled
VCC 1
VOUT 2
CH1 20.0mV BW CH2 20.0mV BW M 400ns CH1
Figure 11. 1.5× Mode Operating Waveforms
220mV
ADM8845
95
90
85
80
75
70
65
60
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
Figure 12. LED Efficiency vs. Varying Duty Cycle of 1 kHz PWM Signal,
Six LEDs Enabled, 20 mA/LED
CTRL1/2
1
CURRENT
2
VOUT
3
CH1 2.00V BW
CH3 1.00V
CH2 160mA BW M 5.00s CH2
180mV
Figure 13. Soft Start Showing the Initial In-Rush Current and VOUT Variation,
Six LEDs at 20 mA/LED, VCC = 3.6 V
VCC 1
VOUT 2
CH1 20.0mV BW CH2 20.0mV BW M 400ns CH1
Figure 14 .2× Mode Operating Waveform
220mV
Rev. D | Page 7 of 18
Share Link: 