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參數資料
| 型號： | TPS65161PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數： | 15/34頁 |
| 文件大小： | 847K |
| 代理商： | TPS65161PWPRG4 |
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SLVS617D – APRIL 2006 – REVISED SEPTEMBER 2009 ............................................................................................................................................... www.ti.com
Layout Consideration
The PCB layout is an important step in the power supply design. An incorrect layout could cause converter
instability, load regulation problems, noise, and EMI issues. Especially with a switching dc-dc converter at high
load currents, too-thin PCB traces can cause significant voltage spikes. Good grounding becomes important as
well. If possible, a common ground plane to minimize ground shifts between analog (GND) and power ground
(PGND) is recommended. Additionally, the following PCB design layout guidelines are recommended for the
TPS65161:
1. Separate the power supply traces for AVIN and VINB, and use separate bypass capacitors.
2. Use a short and wide trace to connect the OS pin to the output of the boost converter.
3. To minimize noise coupling into the OS pin, use a 470-pF bypass capacitor to GND.
4. Place the rectifier diode of the step down converter as close as possible to the SWB pin.
5. Use short traces for the charge-pump drive pins (DRN, DRP) of VGH and VGL because these traces carry
switching waveforms.
6. Place a 1-
μF bypass capacitor from the SUP pin to GND.
7. Place the flying capacitors as close as possible to the DRP and DRN pin, avoiding a high voltage spike at
these pins.
8. Place the Schottky diodes as close as possible to the IC, respective to the flying capacitors connected to the
DRP and DRN.
9. Route the feedback network of the negative charge pump away from the drive pin traces (DRN) of the
negative charge pump. This avoids parasitic coupling into the feedback network of the negative charge pump
giving good output voltage accuracy and load regulation. To do this, use the FREQ pin and trace to isolate
DRN from FBN.
10. Connect a 220-nF capacitor directly from the REF pin (24) to GND (23) for a stable and noise free reference
voltage.
22
Copyright 2006–2009, Texas Instruments Incorporated
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS65161PWPT | 制造商:Texas Instruments 功能描述:BIAS PS FOR TV AND MONITOR TFT LCD PNLS 28TSSOP - Tape and Reel |
| TPS65162EVM-278 | 功能描述:電源管理IC開發工具 TPS65162EVM-278 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65162RGZR | 功能描述:LCD 驅動器 4 Ch Power Supply RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TPS65162RGZRG4 | 功能描述:LCD 驅動器 12V/2.8A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TPS65163RGZR | 功能描述:其他電源管理 LCD Bias with Int 9Ch Level Shifter RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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