- 您现在的位置：买卖IC网 > PDF目录69509 > TPS40054PWPRG4 (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | TPS40054PWPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, HTSSOP-16 |
| 文件页数： | 4/35页 |
| 文件大小： | 866K |
| 代理商： | TPS40054PWPRG4 |
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页第29页第30页第31页第32页第33页第34页第35页
CALCULATING THE OUTPUT CAPACITANCE
DV + DI ESR )
1
8
C
O
f
SW
V
P*P
(6)
E
L +
1
2
L
I2 (Joules)
(7)
I2 +
I
OH
2
* IOL
2
(Amperes)
2
(8)
E
C +
1
2
C
V2 (Joules)
(9)
V2 +
V
f
2
* Vi
2
Volts2
(10)
C
O +
L
I
OH
2
* IOL
2
V
f
2
* Vi
2
(Farads)
(11)
SLUS593F – DECEMBER 2003 – REVISED SEPTEMBER 2008 ...................................................................................................................................... www.ti.com
The output capacitance depends on the output ripple voltage requirement, output ripple current, as well as any
output voltage deviation requirement during a load transient.
The output ripple voltage is a function of both the output capacitance and capacitor ESR. The worst-case output
ripple is described in Equation 6.
The output ripple voltage is typically between 90% and 95% due to the ESR component.
The output capacitance requirement typically increases in the presence of a load transient requirement. During a
step load, the output capacitance must provide energy to the load (light to heavy load step) or absorb excess
inductor energy (heavy to light load step) while maintaining the output voltage within acceptable limits. The
amount of capacitance depends on the magnitude of the load step, the speed of the loop and the size of the
inductor.
Stepping the load from a heavy load to a light load results in an output overshoot. Excess energy stored in the
inductor must be absorbed by the output capacitance. The energy stored in the inductor is described in
where
I
OH is the output current under heavy load conditions
I
OL is the output current under light load conditions
Energy in the capacitor is described in Equation 9.
where
V
f is the final peak capacitor voltage
V
i is the initial capacitor voltage
Substituting Equation 8 into Equation 7, then substituting Equation 10 into Equation 9, then setting Equation 9
12
Copyright 2003–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS40054 TPS40055 TPS40057
相关PDF资料 |
PDF描述 |
|---|---|
| TPS40055PWPG4 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40057PWP | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40056PWPG4 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40056PWPRG4 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40057MPWPREP | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40055 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40055-EP | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40055EVM-001 | 功能描述:电源管理IC开发工具 Eval Mod Converter 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 |
| TPS40055EVM-002 | 功能描述:电源管理IC开发工具 Wide Input Range Converter 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 |
| TPS40055MPWPREP | 功能描述:DC/DC 开关控制器 Mil Enh Wide Input Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
发布紧急采购，3分钟左右您将得到回复。