- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98281 > TPS40042DRCTG4 (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | TPS40042DRCTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 8/35頁 |
| 文件大小： | 746K |
| 代理商： | TPS40042DRCTG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
www.ti.com
PCB Layout Guidelines
HDRV
S W
BOOT
LDRV
EN
FB
COMP
VDD
TPS40042
GND
Locate Components Over SignalGround Island
SignalGround
PowerGround Locate Components OverPower Ground
Output
Current
Loop
Input
Current
Loop
SR Gate
Drive
Main
Gate
Drive
VDD
Bypass
VDD Filter
(Optional)
Current
Limit Set
Resistor
V
IN
EN
Enable Bypass
(Optional)
BOOST Resistor
(Optional)
REFIN
PPAD
Reference
Input
V
OUT
UDG-07140
Power Component Routing
Device to Power Stage Interface
SLUS777 – NOVEMBER 2007
A synchronous BUCK power stage has two primary current loops, the input current loop that carries high ac
discontinuous current and an output current loop that carries high dc continuous current. The output current loop
carries low ac inductor ripple current.
Figure 18. Synchronous BUCK Power Stage
As shown in Figure 18, the input current loop contains the input capacitors, the switching MOSFET, the inductor,
the output capacitors, and the ground path back to the input capacitors. To keep this loop as small as possible, it
is good practice to place some ceramic capacitance directly between the drain of the main switching MOSFET
and the source of the synchronous rectifier (SR) through a power ground plane directly under the MOSFETs.
The output current loop includes the filter inductor, the output capacitors, and the ground return between the
output capacitors and the source of the synchronous rectifier MOSFET. As with the input current loop, the ground
return between the output capacitor ground and the source of the SR source should be routed under the inductor
and MOSFETs to minimize the power loop area.
The TPS40042 uses a very fast break-before-make anti-cross conduction circuit to minimize power loss. Adding
external impedance in series with the gates of the switching MOSFETs adversely affects the converter’s
operation and must be avoided. The loop impedance (HDRV-to-gate plus source-to-SW and LDRV-to-SR gate
plus SR source-to-GND) should be kept to less than 20 nH to avoid possible cross-conduction. The HDRV and
LDRV connections should widen to 20 mils as soon as possible out from the device pin.
The return for the main switching MOSFET gate drive is the SW pin of the TPS40042. The SW pin should be
routed to the source of the main switching FET with at least a 20-mils wide trace as close to the HDRV trace as
possible to minimize loop impedance.
The return for the SR MOSFET gate drive is the TPS40042 GND pad. The GND pad should be connected
directly to the source of the SR with at least a 20-mil wide trace directly under the LDRV trace. Use a minimum of
2 parallel vias to connect the GND pad to the source of the SR if multiple layers are used.
16
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40042
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS40055MPWPREPG4 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40055QPWPRQ1 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40054QPWPRQ1 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40070PWPRG4 | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40071PWPR | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40050 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40050PWP | 功能描述:DC/DC 開關(guān)控制器 Wide Input Vltg Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40050PWPG4 | 功能描述:DC/DC 開關(guān)控制器 Wide Input Vltg Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40050PWPR | 功能描述:DC/DC 開關(guān)控制器 Wide Input Vltg Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40050PWPRG4 | 功能描述:DC/DC 開關(guān)控制器 Wide Input Vltg Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。