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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： | 11/45页 |
| 文件大小： | 917K |
| 代理商： | TPS40200HD |
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www.ti.com
SGLS400B – OCTOBER 2009 – REVISED MAY 2010
Voltage Setting and Modulator Gain
Since the input current to the error amplifier is negligible, the feedback impedance can be selected over a wide
range. Knowing that the reference voltage is 708 mV, pick a convenient value for R1 and then calculate the value
of R2 from the following formula:
(7)
Figure 31. System Gain Elements
The error amplifier has a DC open-loop gain of at least 60 dB, with a minimum of a 1.5-MHz gain bandwidth
product, which gives the user flexibility with respect to the type of feedback compensation used for this particular
application. The gain selected by the user at the crossover frequency is set to provide an overall unity gain for
the system. The crossover frequency should be selected so that the error amplifier open-loop gain is high with
respect to the required closed-loop gain. This ensures that the amplifier response is determined by the passive
feedback elements.
Copyright 2009–2010, Texas Instruments Incorporated
19
Product Folder Link(s): TPS40200-HT
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相关代理商/技术参数 |
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|---|---|
| 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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