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參數(shù)資料
| 型號： | TPS62510DRC |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, SON-10 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 1063K |
| 代理商： | TPS62510DRC |
Short-Circuit Protection
Thermal Shutdown
Input Capacitor Selection
Output Filter Design (Inductor and Output Capacitor)
=
c
2 xL xC
p
O
2 x2.2 Hx22 F
p
m
=22.8kHz
1
=
(6)
SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com
The TPS62510 monitors the forward current through both the high-side and low-side power devices. This
enables the converter to limit the short-circuit current, which helps to protect the device and other circuits
connected to its output.
As soon as the device's junction temperature exceeds 160°C (typical), all switching activity ceases and both
high-side and low-side power transistors are off. The device continues operation once the temperature fall to
20°C (typical) below its thermal shutdown threshold of 160°C.
Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor is
required for best input voltage filtering, and minimizing the interference with other circuits caused by high input
voltage spikes. The converter needs a ceramic input capacitor of 22
F. The input capacitor may be increased
without any limit for better input voltage filtering. The AVIN pin is separated from the power input of the converter.
Note that the filter resistor may affect the undervoltage lockout threshold since up to 5 mA can flow via this
resistor into the AVIN pin when the converter runs in PWM mode.
Table 1. Input Capacitor Selection
Capacitor Value
Case Size
Component Supplier
Comments
22
F
1206
TDK C3216X5R0J226M
Ceramic
22
F
1206
Taiyo Yuden JMK316BJ226ML
Ceramic
The TPS62510 step-down converter has an internal loop compensation. Therefore, the external L-C filter must
be selected to work with the internal compensation.
The internal compensation is optimized to operate with an output filter of L = 2.2
H with an output capacitor of
with
L = 2.2
H
CO = 22 F
As a general rule of thumb, the product LxC should not move over a wide range when selecting a different output
filter. This is because the internal compensation is designed to work with a certain output filter corner frequency,
as calculated in Equation 6. This is especially important when selecting smaller inductor or output capacitor
values that move the corner frequency to higher frequencies. However, when selecting the output filter a low limit
for the inductor value exists due to other internal circuit limitations. The minimum inductor value for the
TPS62510 should be kept at 2.2
H. Selecting a larger capacitor value is less critical because the corner
frequency drops, causing fewer stability issues.
14
Copyright 2006–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS62510
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS62510DRCR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj. 97% Efficient 1.5A Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62510DRCR/2801 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Adj,96% Eff,1.5A Buck Converter 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(fēng)格:SMD/SMT |
| TPS62510DRCRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj. 97% Efficient 1.5A Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62510DRCT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj. 97% Efficient 1.5A Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62510DRCT | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
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