參數資料
型號: TPS5401DGQT
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝: PLASTIC, MSOP-10
文件頁數: 22/41頁
文件大?。?/td> 1149K
代理商: TPS5401DGQT
Zmod
ESR
OUT
1
f
2
R
C
p
=
R
O
C
O
R
C
P
Type2A
COMP
VSENSE
V
OUT
gm
EA
V
ref
DCEA
OUT
V
G
= A
×
V
P0
O
C
1
f
2
R
C
p
=
DCEA
0
EA
A
R
gm
=
Z1
C
1
f
2
R
C
p
=
www.ti.com
SLVSAB0 – DECEMBER 2010
(27)
A type 2A compensation scheme is recommended for the TPS5401. As RC, CC, CP shown in Figure 41, the
compensation components are chosen to set the desired loop crossover frequency and phase margin for output
filter components. The type 2A compensation has the following characteristics: a dc gain, a low-frequency pole,
and a mid-frequency zero / pole pair.
Figure 41. The Compensation Recommended for the TPS5401
The dc gain is determined by Equation 28:
(28)
where:
ADCEA is the error amplifier open-loop dc gain. It is 10,000 V/V.
The low-frequency pole is determined by Equation 29:
(29)
where:
RO is the output resistance of the error amplifier. It can be calculated by Equation 30.
(30)
The mid-frequency zero is determined by Equation 31.
(31)
Copyright 2010, Texas Instruments Incorporated
29
Product Folder Link(s): TPS5401
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