参数资料
型号: TPS40130RHBR
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32
封装: GREEN, PLASTIC, QFN-32
文件页数: 8/38页
文件大小: 950K
代理商: TPS40130RHBR
www.ti.com
C1
R2
C2
15
+
7
8
+
14
13
+
12
9
R1
Modulator
DIFFO
COMP
FB
DROOP
VREF
VOUT
GSNS
LOUT
VOUT
COUT
RESR
ROUT
VREF
RBIAS
UDG04029
TPS40130DBT
R2 +
R1
AMOD(f)
(15)
AMOD +
V
VIN
0.4
(16)
AMOD(f) + AMOD
f
OP
f
C
(17)
C1 +
1
2p
f
OP
R2
(18)
C2 +
1
2p
f
ESRZ
R2
(19)
SLUS602B – JUNE 2004 – REVISED SEPTEMBER 2005
Figure 5. Compensation Components
The following expressions help in choosing components of the EA compensation network. It is recommended to
fix value of the resistor R1 first as it further simplifies adjustments of the output voltage without altering the
compensation network.
where AMOD is the modulator gain at DC
where AMOD(f) is the modulator gain at the crossover frequency
Introduction of output voltage droop as a measure to reduce amount of filter capacitors changes the transfer
function of the modulator as it is shown in Figure 6 and Figure 7. The droop function introduces another zero in
the modulator gain function.
16
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