參數(shù)資料
型號: L6920DTR
廠商: 意法半導(dǎo)體
英文描述: 1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER
中文描述: 1V的高效SYNCRONOUS升壓轉(zhuǎn)換器
文件頁數(shù): 6/13頁
文件大?。?/td> 183K
代理商: L6920DTR
L6920
6/13
Figure 7.
PFM mode Condition: V
out
= 5V; V
in
=1.5V.
Trace1: Vout (50mV~/div) Trace 4: IL (100mA/div)
Time div.: 5
μ
s/div
Figure 8.
Heavier load - Train pulses overlapping.
Trace1: V
out
(100mV~/div) Trace 4: I
L
(200mA/div)
Time div.: 10
μ
s/div
Figure 9.
Heavy load - Inductor current ripples
below I
lim
Trace1: V
out
(100mV~/div)
Trace 4: I
L
(200mA/div) Time div.: 20
μ
s/div
Figure 10.
Heavy load and High ESR. Regulation
falls in continuous mode of operation. Trace1:
V
out
(100mV~/div) Trace 4: I
L
(200mA/div). Time
div.: 5
μ
s/div
When Iload is heavier, the pulse trains are overlapped. Figures 7 - 8 show some possible behaviors.
Considering that current in the inductor is limited to 1A, the maximum load current is defined by the following
relationship:
V
V
out
eq. (1)
Where
η
is the efficiency and I
lim
=1A.
Of course, if Iload is greater than Iload_lim the regulation is lost (figure 11).
I
load_lim
-----------
I
lim
T
off min
V
-------------------------
V
in
2 L
η
=
相關(guān)PDF資料
PDF描述
L6920D 1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER
L6920 1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER
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