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參數(shù)資料
| 型號： | TPS40090RHDRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封裝： | GREEN, PLASTIC, QFN-28 |
| 文件頁數(shù)： | 6/31頁 |
| 文件大?。?/td> | 881K |
| 代理商： | TPS40090RHDRG4 |
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FEEDBACK LOOP COMPENSATION
f
OP +
1
2p
R
OUT
C
OUT
f
ESRZ +
1
2p
R
ESR
C
OUT
(10)
R2 + R1
10
*GOMAG
20
;
C1 +
1
2p
F
OP
R2
;
C2 +
1
2p
F
ESRZ
R2
(11)
SLUS578B – OCTOBER 2003 – REVISED MAY 2006
APPLICATION INFORMATION (continued)
The TPS4009x operates in a peak current mode and the converter exhibits a single pole response with ESR
zero for which Type II compensation network is usually adequate, as shown in Figure 7.
The following equations show where the load pole and ESR zero calculations are situated.
To achieve desired bandwidth the error amplifier must compensate for modulator gain loss on the crossover
frequency and this is facilitated by placing the zero over the load pole. The ESR zero alters the modulator's -1
slope at higher frequencies. To compensate for that alteration, the pole in-error amplifier transfer function should
be added at frequency of the ESR zero as shown in Figure 6.
Figure 6.
The following equations help in choosing components of the error amplifier compensation network. Fixing the
value of the resistor R1 first is recommended as it simplifies further adjustments of the output voltage without
altering the compensation network.
where:
G
OMAG is the control to output gain at desired sytem crossover frequency.
Introduction of output voltage droop as a measure to reduce amount of filter capacitors changes the transfer
function of the modulator as it is shown in the Figure 8.
14
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| TPS40090RHDT | 功能描述:DC/DC 開關控制器 4Ch Multiphase Buck DC/DC Cntrlr 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40090RHDTG4 | 功能描述:DC/DC 開關控制器 4Ch Multiphase Buck DC/DC Cntrlr 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40091 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH FREQUENCY MULTIPHASE CONTROLLER |
| TPS40091PW | 功能描述:DC/DC 開關控制器 4 Ch Multiphase Buck DC/DC w/Tri-state 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40091PWG4 | 功能描述:DC/DC 開關控制器 4Ch Multiphase Buck DC/DC Cntrlr 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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