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| 型号： | TPS40200HD |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | PLASTIC, SOIC-8 |
| 文件页数： | 32/45页 |
| 文件大小： | 917K |
| 代理商： | TPS40200HD |
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SGLS400B – OCTOBER 2009 – REVISED MAY 2010
www.ti.com
Layout Hints
AC current loops must be kept as short as possible. For the maximum effectiveness from C1, place it near
the VDD pin of the controller and design the input ac loop consisting of C1-RSENSE-Q1-D1 to be as short as
possible. Excessive high-frequency noise on VDD during switching degrades overall regulation as the load
increases.
Output loop A (D1-L1-C2) also should be kept as small as possible. Otherwise, the application’s output noise
performance is degraded.
It is recommended that traces carrying large ac currents NOT be connected through a ground plane. Instead,
use PCB traces on the top layer to conduct the ac current and use the ground plane as a noise shield. Split
the ground plane as necessary to keep noise away from the TPS40200 and noise-sensitive areas, such as
feedback resistors, R6 and R10.
Keep the SW node as physically small as possible to minimize parasitic capacitance and to minimize radiated
emissions
For good output voltage regulation, Kelvin connections should be brought from the load to R6 and R10.
The trace from the R6-R10 junction to the TPS40200 should be short and kept away from any noise source,
such as the SW node.
The gate drive trace should be as close to the power FET gate as possible.
38
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS40200-HT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40200-HT | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER |
| TPS40200MDREP | 功能描述:DC/DC 开关控制器 Mil Enhanced Nonsync Vltg-Mode Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS40200MDREPG4 | 功能描述:电压模式 PWM 控制器 EP DC/DC CONTROLLER RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| TPS40200-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER |
| TPS40200QDRQ1 | 功能描述:DC/DC 开关控制器 Wide-Inp-Rng Nonsync Vltg-Mode Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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