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參數(shù)資料
| 型號： | TPS61041DRV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES |
| 中文描述： | 低功耗DC / DC升壓轉換器采用SOT - 23和兒子套票 |
| 文件頁數(shù)： | 13/22頁 |
| 文件大?。?/td> | 491K |
| 代理商： | TPS61041DRV |
www.ti.com
INPUT CAPACITOR SELECTION
For good input voltage filtering, low ESR ceramic capacitors are recommended. A 4.7
μ
F ceramic input capacitor
is sufficient for most of the applications. For better input voltage filtering this value can be increased. See
Table 4
and typical applications for input capacitor recommendations.
DIODE SELECTION
To achieve high efficiency a Schottky diode should be used. The current rating of the diode should meet the
peak current rating of the converter as it is calculated in the
Peak Current Control
section. Use the maximum
value for I
LIM
for this calculation. See
Table 5
and the typical applications for the selection of the Schottky diode.
LAYOUT CONSIDERATIONS
Typical for all switching power supplies, the layout is an important step in the design; especially at high peak
currents and switching frequencies. If the layout is not carefully done, the regulator might show noise problems
and duty cycle jitter.
V
IN
SW
FB
EN
GND
L1
D1
R1
R2
C
FF
C
O
V
O
V
IN
C
IN
TPS61040
TPS61041
SLVS413C–OCTOBER 2002–REVISED AUGUST 2007
Table 5. Recommended Schottky Diode for Typical LCD Bias Supply (see
Figure 15
)
DEVICE
REVERSE VOLTAGE
30 V
20 V
20 V
30 V
COMPONENT SUPPLIER
ON Semiconductor MBR0530
ON Semiconductor MBR0520
ON Semiconductor MBRM120L
Toshiba CRS02
COMMENTS
TPS61040/41
High efficiency
The input capacitor should be placed as close as possible to the input pin for good input voltage filtering. The
inductor and diode should be placed as close as possible to the switch pin to minimize the noise coupling into
other circuits. Because the feedback pin and network is a high-impedance circuit, the feedback network should
be routed away from the inductor. The feedback pin and feedback network should be shielded with a ground
plane or trace to minimize noise coupling into this circuit.
Wide traces should be used for connections in bold as shown in
Figure 15
. A star ground connection or ground
plane minimizes ground shifts and noise.
Figure 15. Layout Diagram
Copyright 2002–2007, Texas Instruments Incorporated
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61041DRVR | 功能描述:LED照明驅動器 28V 250-mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61041DRVRG4 | 功能描述:LED照明驅動器 28V 250-mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61041DRVT | 功能描述:LED照明驅動器 28V 250mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61041DRVTG4 | 功能描述:LED照明驅動器 28V 250-mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61041-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE |
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