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參數(shù)資料
| 型號： | TPS54040QDGQRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 21/52頁 |
| 文件大小： | 1880K |
| 代理商： | TPS54040QDGQRQ1 |
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Z
OUT
C
P
s
1
2
V
Adc
V
s
1
2
+
÷
p
è
=
+
÷
p
è
f
ps
L
Adc = gm
R
P
OUT
L
1
f
C
R
2
=
p
Z
OUT
ESR
1
C
R
2
=
p
f
Vref
VO
R1
R3
C1
C2
R2
CO
RO
gmea
COMP
VSENSE
Type2A
Type2B
Type1
C2
R3
C1
SLVSA26B
– JANUARY 2010 – REVISED MARCH 2011
DETAILED DESCRIPTION (continued)
(14)
(15)
(16)
(17)
Small Signal Model for Frequency Compensation
The TPS54040 uses a transconductance amplifier for the error amplifier and readily supports three of the
commonly-used frequency compensation circuits. Compensation circuits Type 2A, Type 2B, and Type 1 are
shown in Figure 48. Type 2 circuits most likely implemented in high bandwidth power-supply designs using low
ESR output capacitors. The Type 1 circuit is used with power-supply designs with high-ESR aluminum
electrolytic or tantalum capacitors.. Equation 18 and Equation 19 show how to relate the frequency response of
the amplifier to the small signal model in Figure 48. The open-loop gain and bandwidth are modeled using the RO
and CO shown in Figure 48. See the application section for a design example using a Type 2A network with a
low ESR output capacitor.
Equation 18 through Equation 27 are provided as a reference for those who prefer to compensate using the
preferred methods. Those who prefer to use prescribed method use the method outlined in the application
section or use switched information.
Figure 48. Types of Frequency Compensation
28
Copyright
2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS54040-Q1
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| TPS54040QDRCRQ1 | 功能描述:直流/直流開關轉換器 Aut Cat 3.5-42V 0.5A Step Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| TPS5405 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:6.5-V TO 28-V INPUT VOLTAGE, 5-V FIXED OUTPUT, 2-A OUTPUT CURRENT, NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET |
| TPS5405DR | 功能描述:直流/直流開關調節(jié)器 6.5-28Vin,5V Fixed Output at 1A SD Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS5405EVM | 功能描述:電源管理IC開發(fā)工具 TPS5405 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54060 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:0.5A, 60V STEP DOWN SWIFT? DC/DC CONVERTER WITH ECO-MODE? |
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