参数资料
型号: TPS40195PWG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16
封装: GREEN, PLASTIC, TSSOP-16
文件页数: 21/43页
文件大小: 1086K
代理商: TPS40195PWG4
2
3
TPS40195
R
SET
R
PZ2
C
Z2
C
P2
FB
COMP
R
Z1
R
P1
C
PZ1
VOUT
20
100
1 k
1 M
10
0
10
20
30
40
f Frequency Hz
Gain
dB
fP2
fP1
fZ2
fZ1
HighFrequency
Gain
(
)
(
)
REGF
Z1
SET
OUT
REF
V
R
V
=
-
(42)
SET
0.591 51k
R
24.9 k
1.8
0.591
W
=
W
-
(43)
f
PZ2
Z1
P1
c
PZ1
Z1
P1
C
PZ1
1
R
2
C
Gain
1
R
2
C
+
÷
÷
÷
p
è
è
=
+
÷
p
è
(44)
P1
PZ1
1
f
2
R
C
=
p
(45)
P 2
Z 2
P 2
PZ 2
P 2
Z 2
PZ 2
P 2
C
1
f
2
R
C
2
R
C
+
=
p
p
(46)
Z1
PZ1
1
f
2
R
C
=
p
(47)
(
)
Z 2
PZ 2
P 1
Z 2
PZ 2
Z 2
1
f
2
R
C
2
R
C
=
p
+
p
(48)
SLUS720D – FEBRUARY 2007 – REVISED NOVEMBER 2008 ........................................................................................................................................ www.ti.com
A Type-III compensation network, shown in Figure 26, is used for this design. A typical bode plot of a Type-III
compensation network is shown below in Figure 27.
Figure 26. Type III Compensation Schematic
Figure 27. Type-III Compensation Network Typical Bode
Plot
The output voltage, the high-frequency gain and the break (pole and zero) frequencies are calculated using the
following equations.
Steps in closing the feedback loop.
1. Place one zero well below the L-C double pole at 5.8 kHz (fZ1=2.1 kHz)
28
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS40195
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