參數(shù)資料
型號(hào)： L6712D
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, PDSO28
封裝： SO-28
文件頁數(shù)： 2/29頁
文件大小： 624K
代理商： L6712D
L6712A L6712
10/29
Figure 6. Reference Management
The output regulated voltage accuracy can be extracted from the following relationships (worst case con-
dition):
(worst case with internal reference)
(worst case with external reference)
where VOS_RA and VOS_EA are the offsets related to the Error Amplifier and the Remote Amplifier respec-
tively and KOS = 1+1/RA_Gain reflects the impact of the Remote Amplifier Gain (RA_Gain) on the regula-
tion (see relevant section).
A statistical analysis could consider applying the root-sum-square (RSS) method to calculate the precision
since all the variables are statistically independent as follow:
(with internal reference)
(with external reference)
BAND-GAP
REFERENCE
(1.235V)
DAC
VID3
VID2
VID1
REF_IN/OUT
CONTROL
LOGIC
VIDx
DIGITAL
SOFT-START
VPROG
ERROR
AMPLIFIER
FB
COMP
INTERNAL REFERENCE
EXTERNAL REFERENCE
V
OUT_TOT_ACC %
[]
V
OUT_ACC %
[] K
OS
V
OS_RA
V
OUT
-------------------- 100
+
0.9%
±
() K
OS
8mV
±
()
V
OUT
--------------------- 100
+
==
V
OUT_TOT_ACC %
[] EXT_REF_Accuracy[%]
V
PROG
REF_IN/OUT
------------------------------------- [%]
V
OS_EA
EXT_REF
--------------------------- 100
K
OS
V
OS_RA
V
OUT
-------------------- 100=
++
+
=
EXT_REF_Accuracy[%]
2.0%
±
()
5mV
±
()
EXT_REF
--------------------------- 100
K
OS
8mV
±
()
V
out
--------------------- 100
++
+
=
V
OUT_TOT_ACC [%]
V
OUT_ACC [%]
()
2
K
OS
V
OS_RA
V
OUT
-------------------- 100
+
2
=
V
OUT_TOT_ACC [%] =
EXT_REF_Accuracy[%]
()
2
+
V
PROG
REF_IN/OUT
------------------------------------- [%]
2
+
V
OS_EA
EXT_REF
--------------------------- 100
2
+K
OS
V
OS_RA
V
OUT
-------------------- 100
2
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