參數(shù)資料
型號(hào)： TPS40180RGER
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.05 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC24
封裝： GREEN, PLASTIC, VQFN-24
文件頁(yè)數(shù)： 35/52頁(yè)
文件大?。?/td> 1291K
代理商： TPS40180RGER
www.ti.com
V (s )
C(s )
VC(s )
T
G
=
(45)
(
)
(
)
P
1
f
176.8kHz
C1 C2
2
R2
C1 C2
=
p
÷
÷
+
è
(46)
Z
1
f
2.5kHz
2
R2 C2
=
p
(47)
(
)
V
C
T
j 2
f
1
p
=
(48)
(
)
4
CM
1
A
6.29 10
R1
C1 C2
=
+
(49)
+
HAT2164 H
HAT2167H
SLVS753B – FEBRUARY 2007 – REVISED NOVEMBER 2007
Assume the desired crossover frequency is 25 kHz, then set the compensator zero about 1/10 of the crossover
frequency and the compensator pole equal to the ESR zero. The compensator gain is then calculated to achieve
the desired bandwidth. In this design, the compensator gain, pole and zero are selected using Equation 46
through Equation 49.
From Equation 48, the compensator gain is solved as 4.5
×105.
Set R1 equal to 10 k
, and then calculate all the other components.
R2=40 k
C1=22 pF
C2=1.6 nF
In the real laboratory practice, the final components are selected as following to increase the phase margin and
reduce PWM jitter.
R1=10 k
R2=39 k
C1=22 pF
C2=2.7nF
Figure 37. Single Output Converter Schematic
40
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40180
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