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參數(shù)資料
| 型號： | L6615N |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HIGH/LOW SIDE LOAD SHARE CONTROLLER |
| 中文描述： | 高/低側(cè)負(fù)載共享控制器 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大?。?/td> | 392K |
| 代理商： | L6615N |
17/20
L6615
Figure 16. Offset Trimming
Because of the tolerance of the output voltage, it is not possible to delete completely the effect of the offset
on CGA pin on all the allowed output voltage range: if the trimming operation is performed at V
OUT(MIN)
,
then on pin CGA the maximum residual voltage will be present at V
OUT(MAX)
and its value will be:
To simplify the procedure, the following step-by step process can be used:
I
a trimmer has to be placed between sense pins of each section: the value of the trimmer resistance
must be at least one order of magnitude higher than R
G
and it has to be set at one half of its range
(
δ
=0.5);
I
once the application is running at a load defined by the designer based on the required sharing
accuracy, the master section has to be located;
I
on the slave sections it is then necessary to operate on the trimmer to make equal the output currents.
REFERENCE
[1] "L6910 - Adjustable step down controller with synchronous rectification" (Datasheet)
[2] "L6911 - 5 bit programmable step down controller with synchronous rectification" (Datasheet
I
LOAD
L6615
CS-
CGA
R
CGA
R
G
R
G
δ
R
K
(
1-
δ)
R
K
V
OUT
+V
SENSE
V
OUT
+
_
R
SNS
I
G
V
M
V
P
CS+
R
CGA
V
OUT MAX
)
V
OUT MIN
)
–
(
)
1
2
δ
–
δ
OPT
R
K
δ
OPT
R
K
–
R
G
–
(
)
-----------------------------------------------------------------------------
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