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參數(shù)資料
| 型號(hào)： | TPS54611-Q1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs(SWIFT) |
| 中文描述： | 3 - V至6 V輸入，6 - A輸出同步降壓PWM開關(guān)帶有集成FET協(xié)會(huì)（SWIFT） |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 246K |
| 代理商： | TPS54611-Q1 |
SGLS266D OCTOBER 2004 REVISED DECEMBER 2004
www.ti.com
10
APPLICATION INFORMATION
Figure 10 shows the schematic diagram for a typical
TPS54614 application. The TPS54614 (U1) can provide
greater than 6 A of output current at a nominal output
voltage of 1.8 V. For proper operation, the exposed thermal
PowerPAD underneath the integrated circuit package
needs to be soldered to the printed-circuit board.
13
14
15
16
17
18
19
12
7
8
9
10
11
6
BOOT
5
PH
PH
PH
PH
PH
PH
PH
PH
PH
PGND
PGND
PGND
PGND
PGND
PwrPad
AGND
NC
VSENSE
RT
SS/ENA
VBIAS
PWRGD
VIN
VIN
VIN
VIN
VIN
20
21
22
23
24
27
28
26
25
4
3
2
1
0.047
μ
F
7.2
μ
H
680
μ
F
VO
1.8 V
10 k
Enable
0.1
μ
F
VI
3 V 6 V
10
μ
F
220
μ
F
FSEL
PwrGood
CSS
Figure 10. Application Circuit
COMPONENT SELECTION
The values for the components used in this design
example were selected using the SWIFT designer
software tool. SWIFT designer provides a complete design
environment for developing dc-dc converters using the
TPS54614, or other devices in the SWIFT product family.
Additional design information is available at www.ti.com.
INPUT FILTER
The input to the circuit is a nominal 3.3 VDC or 5 VDC. The
input filter is a 220-
μ
F POSCAP capacitor, with a
maximum allowable ripple current of 3 A. A 10-
μ
F ceramic
capacitor for the TPS54614 is required, and must be
located as close as possible to the device.
FEEDBACK CIRCUIT
The output voltage of the converter is fed directly into the
VSENSE pin of the TPS54614. The TPS54614 is
internally compensated to provide stability of the output
under varying line and load conditions.
OPERATING FREQUENCY
In the application circuit, 350 kHz operation is selected by
leaving FSEL open. Different operating frequencies can
be selected by connecting a resistor between RT pin and
AGND. Choose the value of R using Equation 1 for the
desired operating frequency:
R
500 kHz
SwitchingFrequency
100 k
Alternately, a preset operating frequency of 550 kHz can
be selected by leaving RT open and connecting the FSEL
pin to V
I
.
OUTPUT FILTER
The output filter is composed of a 5.2-
μ
H inductor and a
470-
μ
F capacitor. The inductor is low dc resistance
(16-m
) type, Sumida CDRH104R5R2. The capacitor
used is a 4-V POSCAP with a maximum ESR of 40 m
.
The output filter components work with the internal
compensation network to provide a stable closed loop
response for the converter.
(1)
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| TPS54612 | 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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| TPS54612PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Lo-In Voltage 6A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| TPS54612PWP | 制造商:Texas Instruments 功能描述:BUCK PWM REG FET 6A SMD 54612 |
| TPS54612PWPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Lo-In Voltage 6A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
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