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參數資料

型號：	TPS40055MPWPREPG4
廠商：	TEXAS INSTRUMENTS INC
元件分類：	穩壓器
英文描述：	SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝：	PLASTIC, HTSSOP-16
文件頁數：	9/35頁
文件大小：	2348K
代理商：	TPS40055MPWPREPG4

www.ti.com

SGLS310B – JULY 2005 – REVISED OCTOBER 2010

Figure 13. Type III Compensation Configuration

Figure 14. Type III Compensation Gain and Phase

The poles and zeros for a Type III network are described in Equation 25.

(25)

The value of R1 is somewhat arbitrary, but influences other component values. A value between 50 k

and

100 k

usually yields reasonable values.

The unity gain frequency is described in Equation 26.

(26)

where G is the reciprocal of the modulator gain at fC.

The modulator gain as a function of frequency at fC, is described in Equation 27.

(27)

Minimum Load Resistance

Care must be taken not to load down the output of the error amplifier with the feedback resistor, R2, that is too

small. The error amplifier has a finite output source and sink current, which must be considered when sizing R2.

Too small a value does not allow the output to swing over its full range.

(28)

CALCULATING THE BOOST AN BP10 BYPASS CAPACITOR

The BOOST capacitance provides a local, low impedance source for the high-side driver. The BOOST capacitor

should be a good quality, high-frequency capacitor. The size of the bypass capacitor depends on the total gate

charge of the MOSFET and the amount of droop allowed on the bypass capacitor. The BOOST capacitance is

described in Equation 29.

(29)

Product Folder Link(s): TPS40055-EP

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相關代理商/技術參數	參數描述
TPS40055PWP	功能描述:DC/DC 開關控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
TPS40055PWPG4	功能描述:DC/DC 開關控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
TPS40055PWPR	功能描述:DC/DC 開關控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
TPS40055PWPRG4	功能描述:DC/DC 開關控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
TPS40056	制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE-INPUT SYNCHRONOUS, TRACKING BUCK CONTROLLER

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