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參數(shù)資料
| 型號： | TPS54290PWP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4.6 A DUAL SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | GREEN, PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 7/35頁 |
| 文件大?。?/td> | 1397K |
| 代理商： | TPS54290PWP |
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R1
V
OUT1
R2
C1
(Optional)
1
2
3
4
16
15
14
13
PVDD2
BOOT2
SW2
PGND2
PVDD1
BOOT1
SW1
PGND1
TPS54290
5
6
7
12
11
10
BP
GND
FB2
EN1
EN2
FB1
8
9
COMP1
COMP2
C2
(Optional)
Z
UPPER
Z
LOWER
C
COMP
R
COMP
UDG-09129
OUT
L
C
C1
R1
=
(
)
(
)
OUT
ESR
R1
R2
C2
C
R1 R2
+
=
(
)
KEA
20
LOWER
UPPER
COMP
M
LOWER
10
Z
R
g
Z
+
=
COMP
POLE
COMP
1
C
2
f
R
=
p
(
)
POLE
LOAD
OUT
1
f
2
R
C
=
p
www.ti.com
SLUS973 – OCTOBER 2009
Figure 17. Loop Compensation Network
If operating at wide duty cycles (over 50%), a capacitor may be necessary across the upper resistor of the
voltage setting divider. If duty cycles are less than 50%, this capacitor may be omitted.
(8)
If a high ESR capacitor is used in the output filter, a zero appears in the loop response that could lead to
instability. To compensate, a small capacitor is placed in parallel with the lower voltage setting divider resistor.
The value of the capacitor is determined such that a pole is placed at the same frequency as the ESR zero. If
low ESR capacitors are used, this capacitor may be omitted.
(9)
Next, calculate the value of the error amplifier gain setting resistor and capacitor using Equation 10.
(10)
(11)
where
NOTE
Once the filter and compensation component values have been established,
laboratory measurements of the physical design should be performed to confirm
converter stability.
Copyright 2009, Texas Instruments Incorporated
15
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相關代理商/技術參數(shù) |
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|---|---|
| TPS54290PWPR | 功能描述:直流/直流開關調(diào)節(jié)器 4.5-18V Dual Sync Step Down Converter 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 |
| TPS54291 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A/2.5-A Dual, Fully-Synchronous Buck Converter With Integrated MOSFET |
| TPS54291EVM-431 | 功能描述:電源管理IC開發(fā)工具 Dual Sync Buck Con- verter 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 |
| TPS54291PWP | 功能描述:直流/直流開關轉(zhuǎn)換器 4.5-18V Dual Sync 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 |
| TPS54291PWPR | 功能描述:直流/直流開關調(diào)節(jié)器 4.5-18V Dual Sync Step Down Converter 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 |
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