- 您现在的位置：买卖IC网 > PDF目录69511 > TPS5430DDAR (TEXAS INSTRUMENTS INC) 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | TPS5430DDAR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | GREEN, PLASTIC, SOP-8 |
| 文件页数： | 4/28页 |
| 文件大小： | 810K |
| 代理商： | TPS5430DDAR |
第1页第2页第3页当前第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页第28页
www.ti.com
DVIN +
I
OUT(MAX)
0.25
CBULK
sw
) IOUT(MAX)
ESR
MAX
(2)
I
CIN +
I
OUT(MAX)
2
(3)
SLVS632C – JANUARY 2006 – REVISED NOVEMBER 2006
APPLICATION INFORMATION (continued)
To begin the design process a few parameters must be decided upon. The designer needs to know the
following:
Input voltage range
Output voltage
Input ripple voltage
Output ripple voltage
Output current rating
Operating frequency
Design Parameters
For this design example, use the following as the input parameters:
DESIGN PARAMETER(1)
EXAMPLE VALUE
Input voltage range
10.8 V to 19.8 V
Output voltage
5 V
Input ripple voltage
300 mV
Output ripple voltage
30 mV
Output current rating
3 A
Operating frequency
500 kHz
(1)
As an additional constraint, the design is set up to be small size and low component height.
Switching Frequency
The switching frequency for the TPS5430 is internally set to 500 kHz. It is not possible to adjust the switching
frequency.
Input Capacitors
The TPS5430 requires an input decoupling capacitor and, depending on the application, a bulk input capacitor.
The recommended value for the decoupling capacitor, C1, is 10
F. A high quality ceramic type X5R or X7R is
required. For some applications, a smaller value decoupling capacitor may be used, so long as the input voltage
and current ripple ratings are not exceeded. The voltage rating must be greater than the maximum input voltage,
including ripple.
This input ripple voltage can be approximated by Equation 2 :
Where IOUT(MAX) is the maximum load current, fSW is the switching frequency, CIN is the input capacitor value and
ESRMAX is the maximum series resistance of the input capacitor.
The maximum RMS ripple current also needs to be checked. For worst case conditions, this can be
approximated by Equation 3 :
In this case the input ripple voltage would be 156 mV and the RMS ripple current would be 1.5 A. The maximum
voltage across the input capacitors would be VIN max plus delta VIN/2. The chosen input decoupling capacitor
is rated for 25 V and the ripple current capacity is greater than 3 A, providing ample margin. It is very important
that the maximum ratings for voltage and current are not exceeded under any circumstance.
Additionally some bulk capacitance may be needed, especially if the TPS5430 circuit is not located within about
2 inches from the input voltage source. The value for this capacitor is not critical but it also should be rated to
handle the maximum input voltage including ripple voltage and should filter the output so that input ripple voltage
is acceptable.
12
相关PDF资料 |
PDF描述 |
|---|---|
| TPS5430DDAG4 | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5430DDA | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5431DDARG4 | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5431DDA | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5431DDAR | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS5430DDARG4 | 功能描述:直流/直流开关调节器 5.5 to 36V Input 3A Step Dwn Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS5430DDARG4 | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| TPS5430-EP | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-A WIDE-INPUT-RANGE STEP-DOWN SWIFTa?￠ CONVERTER |
| TPS5430EVM-136 | 功能描述:电源管理IC开发工具 TPS5430EVM-136 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS5430EVM-173 | 功能描述:电源管理IC开发工具 Step Down Conv Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。