參數(shù)資料
型號(hào)： TPS54672PWPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 12 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO28
封裝： GREEN, PLASTIC, HTSSOP-28
文件頁(yè)數(shù)： 20/20頁(yè)
文件大?。?/td> 553K
代理商： TPS54672PWPG4
TPS54672
SLVS397C JULY 2001 REVISED FEBRUARY 2005
www.ti.com
9
OUTPUT FILTER
The output filter is composed of a 0.56-
H Coilcraft
inductor (D01813P561HC) and two 150-
F Cornell
Dublier capacitors (ESRD151M06R). The inductor is a low
dc resistance type. The capacitors used are 4 V POSCAP
types with a maximum ESR of 0.040
.
PCB LAYOUT
Figure 10 shows a generalized PCB layout guide for the
TPS54672. The VIN pins should be connected together on
the printed circuit board (PCB) and bypassed with a low
ESR ceramic bypass capacitor. Minimize the loop area
formed by the bypass capacitor connections, the VIN pins,
and
the
TPS54672
ground
pins.
The
minimum
recommended bypass capacitance is 10
F ceramic with
a X5R or X7R dielectric and the optimum placement is
closest to the VIN pins and the PGND pins.
The TPS54672 has two internal grounds (analog and
power). Inside the TPS54672 the analog ground ties to all
of the noise sensitive signals, while the power ground ties
to the noisier power signals. Noise injected between the
two grounds can degrade the performance of the
TPS54672, particularly at higher output currents. Ground
noise on an analog ground plane can also cause problems
with some of the control and bias signals. For these
reasons, separate analog and power ground traces are
recommended. There should be an area of ground on the
top layer under the IC, with an exposed area for connection
to the PowerPAD. Use vias to connect this ground area to
any internal ground planes. Use additional vias at the
ground side of the input and output filter capacitors as well.
The AGND and PGND pins should be tied to the PCB
ground by connecting them to the ground area under the
device as shown. The only components that should tie
directly to the power ground plane are the input capacitors,
the output capacitors, the input voltage decoupling
capacitor, and the PGND pins of the TPS54672. Use a
separate wide trace for the analog ground signal path. This
analog ground should be used for the voltage set point
divider, timing resistor RT, and bias capacitor grounds.
Connect this trace directly to AGND (pin 1).
The PH pins should be tied together and routed to the
output inductor. Since the PH connection is the switching
node, the inductor should be located very close to the PH
pins and the area of the PCB conductor minimized to
prevent excessive capacitive coupling.
Connect the boot capacitor between the phase node and
the BOOT pin as shown. Keep the boot capacitor close to
the IC and minimize the conductor trace lengths.
Connect the output filter capacitor(s) as shown between
the VOUT trace and PGND. It is important to keep the loop
formed by the PH pins, Lout, Cout, and PGND as small as
practical.
Place the compensation components from the VOUT trace
to the VSENSE, and COMP pins. Do not place these
components too close to the PH trace. Due to the size of
the IC package and the device pin out, the components
must be routed somewhat close, however maintaining as
much separation as possible while still keeping the layout
compact.
Connect the bias capacitor from the VBIAS pin to analog
ground using the isolated analog ground trace. If an RT
resistor is used, connect it to this trace as well.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS54672PWPR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 6-A Act Bus Term/DDR DC/DC Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54672PWPR 制造商:Texas Instruments 功能描述:IC SYNC PWM SWITCHER
TPS54672PWPRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 6-A Act Bus Term/DDR DC/DC Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54672PWRG4 制造商:Texas Instruments 功能描述:
TPS54673 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs
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