參數(shù)資料
型號(hào)： TPS40100RGER
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PQCC24
封裝： GREEN, PLASTIC, QFN-24
文件頁數(shù)： 6/39頁
文件大?。?/td> 762K
代理商： TPS40100RGER
www.ti.com
RF1 +
L
RLDC(Tbase) C
FLT a
(W)
(13)
RLDC(T1) + RLDC(Tbase) RREL(effT1) (W)
(14)
RLDC(T2) + RLDC(Tbase) RREL(effT2) (W)
(15)
RTHE(T1) +
a
RLDC(Tbase) RF1
RLDC(T1) * a RLDC(Tbase)
(W)
(16)
RTHE(T2) +
a
RLDC(Tbase) RF1
RLDC(T2) * a RLDC(Tbase)
(W)
(17)
a + 1 *
RNTC(T1) * RNTC(T2)
RTHE(T1) * RTHE(T2)
(dimensionless)
(18)
b + RNTC(T1) ) RNTC(T2) (W)
(19)
c + RNTC(T1) RNTC(T2) (W2)
(20)
RF3 + *
b " b2 * 4ac
2a
(W)
(21)
RF2 +
RTHE(T1)
RF3 ) RNTC(T1) * RF3 RNTC(T1)
RF3 ) RNTC(T1)
(W)
(22)
Establishing Current Feedback
RGM +
3
43.443
gmCSA
2 ) 0.01543 gm
CSA ) 3.225
10*6
(W)
(23)
TPS40100
SLUS601–MAY 2005
APPLICATION INFORMATION (continued)
where
L is the value of the output inductance (H)
CFLT is the value of the current sense filter capacitor (F)
α is the attenuation ratio chosen from Equation 11
RTHE(T1),RTHE(T2) are the equivalent resistances of the RTHE network at temperatures T1 and T2
RLDC(Tbase) is the DC resistance of the inductor at temperature TBASE in
RLDC(T1),RLDC(T2) are the inductor resistances at temperatures T1 and T2
RREL(effT1),RREL(effT2), are the relative resistances of the inductor at T1 and T2 vs. Tbase
RNCT(T1),RNTC(T2) are the effective resistance of the NTC thermistor at temperatures T1 and T2
The amount of current feedback in a given application is programmable by the user. The amount of current
feedback used is intended to be just enough to reduce the Q of the output filter double pole. This allows design
of a converter control loop that is stable for a very wide range of output capacitance. Setting the current feedback
higher offers little real benefit and can actually degrade load transient response, as well as introduce pulse
skipping in the converter. The current feedback is adjusted by setting the gain of the current sense amplifier. The
amplifier is a transconductance type and its gain is a set by connecting a resistor from the GM pin to GND:
where
RGM is the resistor that sets the gain of the amplifier ()
gmCSA is the gain of the current sense amplifier (S)
The value of the sense amplifier gain should be less than 1000 S, and more than 250 S, with the resulting
gain setting resistor greater than 50 k. As a suggested starting point, set the gain of the current sense amplifier
to a nominal 280 S with RGM of 279 k. This value should accommodate most applications adequately.
Figure 5 shows the current sense amplifier gain setting resistance vs. the sense amplifier gain.
14
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相關(guān)代理商/技術(shù)參數(shù)
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TPS40100RGERG4 功能描述:DC/DC 開關(guān)控制器 Wide In Range Sync Buck for Sequencing RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40100RGET 功能描述:DC/DC 開關(guān)控制器 Wide In Range Sync Buck for Sequencing RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40100RGETG4 功能描述:DC/DC 開關(guān)控制器 Wide In Range Sync Buck for Sequencing RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40101 制造商:TI 制造商全稱:Texas Instruments 功能描述:MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH ADVANCED SEQUENCING AND OUTPUT MARGINING
TPS40101RGER 功能描述:DC/DC 開關(guān)控制器 Mid Range Input Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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