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參數(shù)資料
| 型號(hào)： | TPS40057MPWPREP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 4/33頁 |
| 文件大?。?/td> | 755K |
| 代理商： | TPS40057MPWPREP |
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2
8
4
6
12
10
0
2
4
6
8
10
INPUT VOLTAGE
vs
BP10 VOLTAGE
VIN Input Voltage V
V
B
P
1
0
BP10
V
oltage
V
55
°C
110
°C
25
°C
2
8
4
6
12
10
1
2
3
4
5
6
INPUT VOLTAGE
vs
BP5 VOLTAGE
25
°C
110
°C
55
°C
VIN Input Voltage V
V
B
P
5
BP5
V
oltage
V
SELECTING THE INDUCTOR VALUE
L +
V
IN * VO
V
O
V
IN
DI
f
SW
(Henries)
(4)
CALCULATING THE OUTPUT CAPACITANCE
DV + DI ESR )
1
8
C
O
f
SW
V
P*P
(5)
SGLS310A – JULY 2005 – REVISED AUGUST 2005
APPLICATION INFORMATION (continued)
Figure 7.
Figure 8.
The inductor value determines the magnitude of ripple current in the output capacitors as well as the load
current at which the converter enters discontinuous mode. Too large an inductance results in lower ripple current
but is physically larger for the same load current. Too small an inductance results in larger ripple currents and a
greater number of (or more expensive output capacitors for) the same output ripple voltage requirement. A good
compromise is to select the inductance value such that the converter does not enter discontinuous mode until
the load approximated somewhere between 10% and 30% of the rated output. The inductance value is
described in Equation 4.
where:
VO is the output voltage
I is the peak-to-peak inductor current
The output capacitance depends on the output ripple voltage requirement, output ripple current, as well as any
output voltage deviation requirement during a load transient.
The output ripple voltage is a function of both the output capacitance and capacitor ESR. The worst case output
ripple is described in Equation 5.
The output ripple voltage is typically between 90% and 95% due to the ESR component.
12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40057PWP | 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck src/sink w/prebias 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 |
| TPS40057PWP | 制造商:Texas Instruments 功能描述:CONTROLLER IC |
| TPS40057PWPG4 | 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck src/sink w/prebias 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 |
| TPS40057PWPR | 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck src/sink w/prebias 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 |
| TPS40057PWPRG4 | 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck src/sink w/prebias 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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