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參數(shù)資料
| 型號： | TPS54377RHF |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT⑩ CONVERTER WITH DISABLED SINKING DURING START-UP |
| 中文描述： | 1.6兆赫，3 - V至6 V輸入，3甲同步降壓轉換器的SWIFT⑩與殘疾人沉井在啟動期間 |
| 文件頁數(shù)： | 8/21頁 |
| 文件大?。?/td> | 593K |
| 代理商： | TPS54377RHF |
www.ti.com
APPLICATION INFORMATION
+
VSNS
24
1
2
1
23
2
22
3
21
4
20
5
19
6
18
7
17
8
16
9
15
10
14
11
13
12
COMP
U1
TPS54377
C1
m
150 F
C4
0.1 F
m
C7
150 pF
C6
3300 pF
2200 pF
442
W
10 k
W
C2
100 F
m
L1
1.5 H
m
C10
100 F
m
C11
1000 pF
C9
m
10 F
C5
C3
C8
R5
R1
R4
R6
10 k
W
R3
6.81 k
W
R2
9.76 k
W
41.2 k
W
0.047 F
m
PWRGD
BOOT
PH
PH
PH
PH
PH
PH
NC
PGND
PGND
PwPd
AGND
RT
NC
SYNC
SS/EN
VBIAS
VIN
VIN
VIN
PGND
PGND
VOUT
PWRGD
Open
R( ) =
W
51 k
(MHz)
- 4.7 k
(1)
INPUT VOLTAGE
The input to the circuit is a nominal 3.3 VDC, applied
at J1. The optional input filter (C1) is a 150-μF
capacitor, with a maximum allowable ripple current of
3 A. C9 is the decoupling capacitor for the TPS54377
and must be located as close to the device as
possible.
OUTPUT FILTER
The output filter is composed of a 1.5-μH inductor
and two capacitors. The inductor is a low dc
resistance (0.017
) type, Coilcraft DO1813P-122HC.
The feedback loop is compensated so that the unity
gain frequency is approximately 75 kHz.
FEEDBACK CIRCUIT
The resistor divider network of R1 and R2 sets the
output voltage for the circuit at 1.8 V. R1, along with
R5, R3, C5, C7, and C8 forms the loop compensation
network for the circuit. For this design, a Type 3
topology is used.
PCB LAYOUT
Figure 11
shows a generalized PCB layout guide for
the TPS54377.
OPERATING FREQUENCY
In the application circuit, the 1.1-MHz operation is
selected. Connecting a 41.2-k
between RT (pin 22)
and analog ground can be used to set the switching
frequency from 280 kHz to 1.6 MHz. To calculate the
RT resistor, use the
Equation 1
:
TPS54377
SLVS779–SEPTEMBER 2007
Figure 10
shows the schematic diagram for a typical TPS54377 application. The TPS54377 (U1) provides up to
3 A of output current at a nominal output voltage of 1.8 V. For proper thermal performance, the power pad
underneath the TPS54377 integrated circuit needs to be soldered well to the printed circuit board. The
TPS54377 can be evaluated by replacing the TPS54317 on the TPS54317 EVM.
Figure 10. TPS54377 Schematic
The VIN pins should be connected together on the
printed circuit board (PCB) and bypassed with a low
ESR ceramic bypass capacitor. Care should be taken
to minimize the loop area formed by the bypass
capacitor
connections,
the
TPS54377 ground pins. The minimum recommended
bypass capacitance is 10-μF ceramic with a X5R or
X7R dielectric and the optimum placement is closest
to the VIN pins and the PGND pins.
VIN
pins,
and
the
8
Submit Documentation Feedback
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s):
TPS54377
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54377RHFR | 功能描述:直流/直流開關調(diào)節(jié)器 1.6 MHz 3-6V In 3A Syn. Stp Dwn SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54377RHFRG4 | 功能描述:直流/直流開關調(diào)節(jié)器 1.6 MHz 3V-6V Input 3A Syn. Step Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54377RHFT | 功能描述:直流/直流開關調(diào)節(jié)器 1.6 MHz 3-6V In 3A Syn. Stp Dwn SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54377RHFTG4 | 功能描述:直流/直流開關調(diào)節(jié)器 1.6 MHz 3V-6V Input 3A Syn. Step Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54380 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SWIFT Converter Product Portfolio |
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