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參數(shù)資料
| 型號： | TPS61040DBV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE |
| 中文描述： | 低功率DC / DC升壓轉(zhuǎn)換器SOT - 23封裝 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大小： | 299K |
| 代理商： | TPS61040DBV |
www.ti.com
INPUT CAPACITOR SELECTION
For good input voltage filtering, low ESR ceramic capacitors are recommended. A 4.7 μF ceramic input capacitor
is sufficient for most of the applications. For better input voltage filtering this value can be increased. Refer to
Table 2 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 section peak current control. Use the maximum
value for I
LIM
for this calculation. Refer to Table 3 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
SLVS413B–OCTOBER 2002–REVISED MAY 2004
Table 3. 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 viltering. The
inductor and diode should be placed as close as possible to the switch pin to minimize the noise coupling into
other circuits. Since the feedback pin and network is a high impedance circit 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
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61040DBVR | 功能描述:LED照明驅(qū)動器 28-V 400-mA Switch 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61040DBVR | 制造商:Texas Instruments 功能描述:Power Supply IC |
| TPS61040DBVRG4 | 功能描述:LED照明驅(qū)動器 28-V 400-mA Switch 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61040DBVT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| TPS61040DDCR | 功能描述:LED照明驅(qū)動器 28V,400mA Switch 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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