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參數(shù)資料
| 型號： | TS2508ACSRL |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | ROHS COMPLIANT, SOP-8 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 241K |
| 代理商： | TS2508ACSRL |
TS2508A
3A / 330KHz PWM Buck Converter
4/8
Version: A09
Function Descriptions (Continue)
Setting the Output Voltage
Application circuit item shows the basic application circuit with TS2508A adjustable output version. The external
resistor sets the output voltage according to the following equation:
Table 1: Resistor select for output voltage setting
VOUT
R2
R1
1.3K
6.8K
5V
5.6K
30K
1.5K
4.7K
3.3V
5.6K
18K
2.2K
4.7K
2.5V
5.6K
12K
1.8V
1.2K
1.5K
1.5V
2.2K
2K
1.2V
2K
1K
1V
2K
0.5K
The R2 setting 5.6k that no load current can be reduce to under 4mA for EL CAP
Input Capacitor Selection
This capacitor should be located close to the IC using short leads and the voltage rating should be approximately 1.5
times the maximum input voltage. The RMS current rating requirement for the input capacitor of a buck regulator is
approximately 12 the DC load current. A low ESR input capacitor sized for maximum RMS current must be used. A
220F low ESR capacitor for most applications is sufficient
Output Capacitor Selection
The output capacitor is required to filter the output and provide regulator loop stability. The important capacitor
parameters are; the 100KHz Equivalent Series Resistance (ESR), the RMS ripples current rating, voltage rating, and
capacitance value. For the output capacitor, the ESR value is the most important parameter. The ESR can be
calculated from the following formula.
VRIPPLE = IL x ESR = 0.33A x 130mΩ = 43mV
An aluminum electrolytic capacitor's ESR value is related to the capacitance and its voltage rating. In most case, higher
voltage electrolytic capacitors have lower ESR values. Most of the time, capacitors with much higher voltage ratings
may be needed to provide the low ESR values required for low output ripple voltage. It is recommended to replace this
low ESR capacitor by using a 330F low ESR values < 130mΩ
Inductor Selection
For most designs, the operate with inductors of 12H to 33H. The inductor value can be derived from the following
equation:
Where is inductor Ripple Current. Large value inductors lower ripple current and small value inductors result in high
ripple currents. Choose inductor ripple current approximately 15% of the maximum load current 3A, IL=0.4A. The DC
current rating of the inductor should be at least equal to the maximum load current plus half the ripple current to
prevent core saturation (3A+0.2A).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS2508CS | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 PWM buck controller 2A 330KHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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 |
| TS2508CSRL | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:2A / 330KHz PWM Buck Converter |
| TS2509 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:3A / 500KHz PWM Buck Converter |
| TS2509_13 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:3A / 500KHz PWM Buck Converter |
| TS2509CS | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 PWM buck controller 3A 500KHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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 |
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