參數(shù)資料
型號(hào)： TPS51163DRCR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10
封裝： 3 X 3 MM, GREEN, PLASTIC, SON-10
文件頁數(shù)： 11/26頁
文件大小： 2137K
代理商： TPS51163DRCR
UDG-08110
+
COMP
C1
22 nF
R2
2.7 kW
C2
3.9 nF
R
BIAS
2 kW
C3
8.2 nF
R3
130 W
R1
V
REF
V
OUT
FB
( )
(
)
(
)
(
)
(
)
(
)
2
1
3
2
1
2
1
2
3
1
2
sR C
1
s R
R
C
1
G s
R C C
sR
C
s
1
sR C
1
C
+
+
=
+
+
+
÷
÷
÷
+
è
è
Z1
2
1
f
2.7 kHz
2
R
C
=
p
(
)
Z2
1
3
1
f
9.2kHz
2
R
C
=
p
+
(
)
(
)
P1
1
2
1
2
1
f
17.8 kHz
C
2
R
C
=
p
÷
÷
+
è
P2
3
1
f
149.4 kHz
2
R
C
=
p
(
)
C
1
2
1
f
3.1kHz
2
R
C
=
p
+
1
BIAS
O
0.8
R
2k
V
0.8
=
W
-
www.ti.com ....................................................................................................................................................................................................... SLUS864 – MAY 2009
Figure 10 shows the detailed parameters used for the Type III compensation. Also, poles and zeros for the Type
III network are derived based on Equation 22 through Equation 26.
Figure 10. Parameters for Type III Compensation Network
(37)
(38)
(39)
(40)
(41)
(42)
fP1 is used to cancel the ESR zero. fP2 is placed at higher frequency to attenuate the high-frequency noise and
the switching ripple. fZ1 is lower than resonant frequency f0.
The value of RBIAS is calculated to set the output voltage V OUT by using Equation 27.
(43)
Based on Equation 43 and the power stage parameters, the bode-plot by simulation is shown in Figure 10
(VIN=12 V and IOUT=0 A). The achieved cross-over frequency is approximately 35.7 kHz, and the phase margin is
approximately 60°.
Copyright 2009, Texas Instruments Incorporated
19
Product Folder Link(s) :TPS51113 TPS51163
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