Datasheet

ADM8843
Rev. C | Page 8 of 16
40
45
50
60
80
90
05050-016
V
CC
(V)
POWER EFFICIEN
C
Y (%)
70
55
65
75
85
V
F
= 4.0V
V
F
= 3.8V
V
F
= 4.3V
V
F
= 3.2V
V
F
= 3.6V
2.8 3.0 3.4 3.83.63.2 4.0 4.22.9 3.1 3.3 3.5 3.7 3.9 4.1
Figure 15. Power Efficiency vs. Supply Voltage over Li-Ion Range,
Four LEDs @ 15 mA/LED
05050-017
CH2 2.00mVCH1 2.00V M 10.0ms CH2 4.36mV
2
1
V
OUT
CTRL1/2
Δ: 44.0ms
@: –44.4ms
C2 FALL
200μs
LOW SIGNAL
AMPLITUDE
Figure 16. TPC Delay