參數(shù)資料
型號(hào)： L6701TR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 1.5 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO36
封裝： LEAD FREE, SSO-36
文件頁(yè)數(shù)： 16/44頁(yè)
文件大?。?/td> 627K
代理商： L6701TR
Obsolete
Product(s)
- Obsolete
Product(s)
L6701
10 Output Voltage Positioning
23/44
and, multiplied by three, sourced by the FB pin (IDROOP). RFB gives the final gain to program
the desired load-line slope.
As before, the voltage positioning equations results (See Figure 9):
As a consequence:
=>
The device forces IDROOP = ICSx3, proportional to the read current, into the feedback resistor
RFB implementing the load regulation dependence. The output characteristic vs. load current is
then given by (Offset disabled):
Where RLLDIFF is the resulting differential load-line resistance implemented by the system. The
whole power supply can be then represented by a "real" voltage generator with an equivalent
output resistance RLLDIFF and a voltage value of VID.
RFB resistor can be then designed according to the Load-Line (RLLDIFF) specifications as
follow:
.
where RD is typically designed to have ICS = 35A at the maximum output current (OCP).
Table 9 contains a quick-reference guide to design applications with typical and/or differential
current sense.
Figure 9.
Fully Differential Load-Line Current-Reading (pat. pend.)
I
CS
I
OUT
1s L
DCR
+
1s R
PH
C
PH
+
--------------------------------------------
DCR
R
D
-------------
=
L
DCR
-------------
R
PH
C
PH
=
I
CS
I
OUT
DCR
R
D
-------------
=
V
OUT
VID
R
FB
I
DROOP
–
VID
3 R
FB
DCR
R
D
------------- IOUT
–
VID
R
LLDIFF
I
OU T
–
==
=
R
FB
R
LL DIFF
3
----------------------
R
D
DCR
-------------
=
L2
L1
L3
DCR1
DCR2
DCR3
CPH
R
PH
R
PH
R
PH
RD
PHASE3
PHASE2
PHASE1
VOUT
ICS
CS+
CS-
FB
IDROOP
x 3
RF
CF
RFB
COMP
Fully Differential Current Reading
for Load-Line
CPH
RD
相關(guān)PDF資料
PDF描述
L6712DTR 2 A SWITCHING CONTROLLER, PDSO28
L6712Q 2 A SWITCHING CONTROLLER, QCC36
L6712ADTR 2 A SWITCHING CONTROLLER, PDSO28
L6712D 2 A SWITCHING CONTROLLER, PDSO28
L6712QTR 2 A SWITCHING CONTROLLER, QCC36
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