- 您现在的位置：买卖IC网 > PDF目录69515 > TPS61041DRVRG4 (TEXAS INSTRUMENTS INC) 0.285 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO6 PDF资料下载
参数资料
| 型号： | TPS61041DRVRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.285 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 2 X 2 MM, 0.80 MM HEIGHT, GREEN, PLASTIC, SON-6 |
| 文件页数： | 3/27页 |
| 文件大小： | 779K |
| 代理商： | TPS61041DRVRG4 |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页
V
OUT +
1.233 V
1 )
R1
R2
C
FF +
1
2
p
fS
20
R1
www.ti.com
SLVS413F – OCTOBER 2002 – REVISED DECEMBER 2010
The maximum load current of the converter is the current at the operation point where the converter starts to
enter the continuous conduction mode. Usually the converter should always operate in discontinuous conduction
mode.
Last, the selected inductor should have a saturation current that meets the maximum peak current of the
converter (as calculated in the Peak Current Control section). Use the maximum value for ILIM for this calculation.
Another important inductor parameter is the dc resistance. The lower the dc resistance, the higher the efficiency
of the converter. See Table 4 and the typical applications for the inductor selection.
Table 4. Recommended Inductor for Typical LCD Bias Supply (see Figure 15)
DEVICE
INDUCTOR VALUE
COMPONENT SUPPLIER
COMMENTS
10 mH
Sumida CR32-100
High efficiency
10 mH
Sumida CDRH3D16-100
High efficiency
TPS61040
10 mH
Murata LQH4C100K04
High efficiency
4.7 mH
Sumida CDRH3D16-4R7
Small solution size
4.7 mH
Murata LQH3C4R7M24
Small solution size
High efficiency
TPS61041
10 mH
Murata LQH3C100K24
Small solution size
SETTING THE OUTPUT VOLTAGE
The output voltage is calculated as:
(5)
For battery-powered applications, a high-impedance voltage divider should be used with a typical value for R2 of
≤200 k and a maximum value for R1 of 2.2 M. Smaller values might be used to reduce the noise sensitivity of
the feedback pin.
A feedforward capacitor across the upper feedback resistor R1 is required to provide sufficient overdrive for the
error comparator. Without a feedforward capacitor, or one whose value is too small, the TPS61040/41 shows
double pulses or a pulse burst instead of single pulses at the switch node (SW), causing higher output voltage
ripple. If this higher output voltage ripple is acceptable, the feedforward capacitor can be left out.
The lower the switching frequency of the converter, the larger the feedforward capacitor value required. A good
starting point is to use a 10-pF feedforward capacitor. As a first estimation, the required value for the feedforward
capacitor at the operation point can also be calculated using the following formula:
Where:
R1 = Upper resistor of voltage divider
fS = Switching frequency of the converter at the nominal load current (See the Inductor Selection, Maximum
Load Current section for calculating the switching frequency)
CFF = Choose a value that comes closest to the result of the calculation
(6)
Copyright 2002–2010, Texas Instruments Incorporated
11
相关PDF资料 |
PDF描述 |
|---|---|
| TPS61041DRVT | 0.285 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS61041DBVR | 0.285 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO5 |
| TPS61040DBVR | 0.45 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO5 |
| TPS61040DBV | 0.45 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO5 |
| TPS61040DRVTG4 | 0.45 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS61041DRVT | 功能描述:LED照明驱动器 28V 250mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| TPS61041DRVTG4 | 功能描述:LED照明驱动器 28V 250-mA Sw Boost Converter RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| TPS61041-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW POWER DC/DC BOOST CONVERTER IN SOT-23 PACKAGE |
| TPS61041QDBVRQ1 | 功能描述:LED照明驱动器 Auto Cat Low Pwr DC/DC Boost Cnvrtr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| TPS61042 | 制造商:TI 制造商全称:Texas Instruments 功能描述:CONSTANT CURRENT LED DRIVER |
发布紧急采购，3分钟左右您将得到回复。