- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄220080 > TPS54383PWPR (TEXAS INSTRUMENTS INC) 7 A DUAL SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO14 PDF資料下載
參數(shù)資料
| 型號： | TPS54383PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 7 A DUAL SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | GREEN, PLASTIC, HTSSOP-14 |
| 文件頁數(shù)： | 18/58頁 |
| 文件大?。?/td> | 1773K |
| 代理商： | TPS54383PWPR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第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頁當(dāng)前第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頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁
www.ti.com
Inductor
Current
V
OUT
Ripple
SW Waveform
Steady State
V
IN
= 12 V
V
OUT
= 5 V
SW Waveform
V
OUT
Ripple
Inductor
Current
Skipping
V
IN
= 12 V
V
OUT
= 5 V
SW Node Ringing
SLUS774B – AUGUST 2007 – REVISED OCTOBER 2007
Figure 32. Steady State
Figure 33. Skipping
DESIGN HINT
If additional output capacitance is required to reduce the output voltage ripple during
DCM operation, be sure to recheck Feedback Loop and Inductor-Capacitor (L-C)
Filter Selection and Maximum Output Capacitance sections.
A portion of the control circuitry is referenced to the SW node. To ensure jitter-free operation, it is necessary to
decrease the voltage waveform ringing at the SW node to less than 5 volts peak and of a duration of less than
30-ns. In addition to following good printed circuit board (PCB) layout practices, there are a couple of design
techniques for reducing ringing and noise.
SW Node Snubber
Voltage ringing observable at the SW node is caused by fast switching edges and parasitic inductance and
capacitance. If the ringing results in excessive voltage on the SW node, or erratic operation of the converter, an
R-C snubber may be used to dampen the ringing and ensure proper operation over the full load range.
DESIGN HINT
A series-connected R-C snubber (C = between 330 pF and 1 nF, R = 10
)
connected from SW to GND reduces the ringing on the SW node.
Bootstrap Resistor
A small resistor in series with the bootstrap capacitor reduces the turn-on time of the internal MOSFET, thereby
reducing the rising edge ringing of the SW node.
DESIGN HINT
A resistor with a value between 1
and 3 may be placed in series with the bootstrap
capacitor to reduce ringing on the SW node.
DESIGN HINT
Placeholders for these components should be placed on the initial prototype PCBs in
case they are needed.
Copyright 2007, Texas Instruments Incorporated
25
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC7660SEOA | SWITCHED CAPACITOR REGULATOR, 45 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS3110E12DBVT | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6 |
| TOP248F | 7.2 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6 |
| TD075-048-15M | 1-OUTPUT 75 W DC-DC REG PWR SUPPLY MODULE |
| TD100-150-12M | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54383PWPRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Non-Synch 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 |
| TPS54386 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SWIFT Converter Product Portfolio |
| TPS54386EVM | 功能描述:電源管理IC開發(fā)工具 TPS54386 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54386PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 DC/DC Controller 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 |
| TPS54386PWP | 制造商:Texas Instruments 功能描述:DC/DC Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。