參數(shù)資料
型號(hào): TPS54550PWPRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 9.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO16
封裝: GREEN, PLASTIC, HTSSOP-16
文件頁(yè)數(shù): 9/31頁(yè)
文件大?。?/td> 913K
代理商: TPS54550PWPRG4
www.ti.com
0.015x16
0.120
0.0256
0.230
0.040
0.134
0.197
0.040
0.050
0.013DIA
8PL
Minimumrecommendedexposedcopper
areaforPowerPAD.Somestencilsmay
require10percentlargerarea.
ConnectPin10 AGNDandPin11PGND
to AnalogGroundplaneinthisareafor
optimumperformance.
Minimumrecommendedtop
side AnalogGroundarea.
Minimumrecommendedthermalvias:4x0.013dia.Inside
exposedPowerPADareaand4x0.013dia.Underdeviceas
shown. Additionalviasmaybeusediftopsidegroundareaisextended.
0.080
MODEL FOR LOOP RESPONSE
SLVS623A – MARCH 2006 – REVISED APRIL 2006
Figure 27. Thermal Considerations for PowerPAD Layout
The feed forward gain is modeled as an ideal
voltage- controlled voltage source with a gain of 8
V/V. The 1-mV ac voltage between nodes a and b
Figure 28 shows an equivalent model for the
effectively breaks the control loop for the frequency
TPS54550 control loop which can be modeled in a
response measurements. Plotting b/c shows the
circuit
simulation
program
to
check
frequency
small-signal response of the power stage. Plotting
response and dynamic load response. The error
c/a shows the small-signal response of the frequency
amplifier in the TPS54550 is a voltage amplifier with
compensation. Plotting a/b shows the small-signal
80 dB (10000 V/V) of open-loop gain. The error
response of the overall loop. The dynamic load
amplifier
can
be
modeled
using
an
ideal
response can be checked by replacing the RL with a
voltage-controlled
current
source
as
shown
in
current
source
with
the
appropriate
load
step
Figure 28 with a resistor and capacitor on the output.
amplitude and step rate in a time domain analysis.
The TPS54550 device has an integrated feed
forward compensation circuit which eliminates the
impact of the input voltage changes to the overall
loop transfer function.
17
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