參數(shù)資料
型號(hào)： TPS61041
英文描述： 28-V. 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications
中文描述： 28 - V等。 250毫安開(kāi)關(guān)升壓轉(zhuǎn)換器采用SOT - 23用于LCD和白光LED的應(yīng)用
文件頁(yè)數(shù)： 20/22頁(yè)
文件大?。?/td> 392K
代理商： TPS61041
TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006, TPS61007
SINGLE-AND DUAL-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
SLVS279B – MARCH 2000 – REVISED AUGUST 2000
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
THERMAL INFORMATION
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 PWB design
Improving the thermal coupling of the component to the PWB
Introducing airflow in the system
The maximum junction temperature (T
J
) of the TPS6100x devices is 125
°
C. The thermal resistance of the
10-pin MSOP package (DGS) is R
θ
JA
= 294
°
C/W. Specified regulator operation is assured to a maximum
ambient temperature (T
A
) of 85
°
C. Therefore, the maximum power dissipation is about 130 mW. More power
can be dissipated if the maximum ambient temperature of the application is lower.
mW
W
C
C
C
JA
R
A
MAX
J
T
MAX
D
P
136
/
294
85
125
)
(
)
(
=
°
°
–
°
=
Θ
=
(8)
–
Under normal operating conditions, the sum of all losses generated inside the converter IC is less than 50 mW,
which is well below the maximum allowed power dissipation of 136 mW as calculated in equation 8. Therefore,
power dissipation is given no special attention.
Table 4 shows where the losses inside the converter are generated.
Table 4. Losses Inside the Converter
LOSSES
AMOUNTS
36 mW
Conduction losses in the switch
Switching losses
8 mW
Gate drive losses
2.3 mW
Quiescent current losses
<
1 mW
TOTAL
<
50 mW
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS61041DBV 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES
TPS61041DBVR 功能描述:LED照明驅(qū)動(dòng)器 28-V 250-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
TPS61041DBVR 制造商:Texas Instruments 功能描述:SWITCHING STEP UP CONVERTER 61041
TPS61041DBVRG4 功能描述:LED照明驅(qū)動(dòng)器 28-V 250-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
TPS61041DBVT 制造商:Texas Instruments 功能描述:
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