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參數(shù)資料
| 型號： | TPS61091RSA |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | SYNCHRONOUS BOOST CONVERTER WITH 2A SWITCH |
| 中文描述： | 同步升壓轉(zhuǎn)換器具有2A開關(guān) |
| 文件頁數(shù)： | 17/19頁 |
| 文件大?。?/td> | 457K |
| 代理商： | TPS61091RSA |
www.ti.com
Low-EMI Switch
The device integrates a circuit that removes the ringing that typically appears on the SW node when the
converter enters discontinuous current mode. In this case, the current through the inductor ramps to zero and the
rectifying PMOS switch is turned off to prevent a reverse current flowing from the output capacitors back to the
battery. Due to the remaining energy that is stored in parasitic components of the semiconductor and the
inductor, a ringing on the SW pin is induced. The integrated antiringing switch clamps this voltage to VBAT and
therefore dampens ringing.
THERMAL INFORMATION
PD(MAX)
TJ(MAX)
TA
RJA
150
°
C
38.1 k W
85
°
C
1700 mW
TPS61090
TPS61091, TPS61092
SLVS484A–JUNE 2003–REVISED APRIL 2004
Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires
special attention to power dissipation. Many system-dependent issues such as thermal coupling, airflow, added
heat sinks and convection surfaces, and the presence of other heat-generating components affect the
power-dissipation limits of a given component.
Three basic approaches for enhancing thermal performance are listed below.
Improving the power dissipation capability of the PCB design
Improving the thermal coupling of the component to the PCB
Introducing airflow in the system
The maximum junction temperature (T
J
) of the TPS6109x devices is 150
°
C. The thermal resistance of the 16-pin
QFN PowerPAD package (RSA) isR
Θ
JA
= 38.1
°
C/W, if the PowerPAD is soldered and the board layout is
optimized. Specified regulator operation is assured to a maximum ambient temperature T
A
of 85
°
C. Therefore,
the maximum power dissipation is about 1700 mW. More power can be dissipated if the maximum ambient
temperature of the application is lower.
If designing for a lower junction temperature of 125
°
C, which is recommended, maximum heat dissipation is
lower. Using the above equation (8) results in 1050 mW power dissipation.
17
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61091RSAR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3-V Output 500-mA Boost 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61091RSARG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3-V Output 500-mA Boost 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61092 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SYNCHRONOUS BOOST CONVERTER WITH 2A SWITCH |
| TPS61092RSA | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SYNCHRONOUS BOOST CONVERTER WITH 2A SWITCH |
| TPS61092RSAR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5-V Output 96% Eff Boost 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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