- 您现在的位置：买卖IC网 > PDF目录272833 > TPS65073TRSLRQ1 (TEXAS INSTRUMENTS INC) POWER SUPPLY SUPPORT CKT, PQCC48 PDF资料下载
参数资料
| 型号： | TPS65073TRSLRQ1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PQCC48 |
| 封装： | 6 X 6 MM, 0.4 MM PITCH, PLASTIC, QFN-48 |
| 文件页数： | 60/90页 |
| 文件大小： | 1375K |
| 代理商： | TPS65073TRSLRQ1 |
第1页第2页第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页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页当前第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页
L
Vout
1
Vin
I
= Vout
L
-
D
L
Lmax
outmax
I
= I
+
2
D
www.ti.com
SLVSAP7 – JANUARY 2011
APPLICATION INFORMATION
STEP-DOWN CONVERTERS
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
Inductor Selection
The step-down converters operate typically with 2.2mH output inductor. Larger or smaller inductor values can be
used to optimize the performance of the device for specific operation conditions. The selected inductor has to be
rated for its DC resistance and saturation current. The DC resistance of the inductance will influence directly the
efficiency of the converter. Therefore an inductor with lowest DC resistance should be selected for highest
efficiency.
Equation 4 can be used to calculate the maximum inductor current under static load conditions. The saturation
current of the inductor should be rated higher than the maximum inductor current as calculated with Equation 4.
This is recommended because during heavy load transient the inductor current will rise above the calculated
value.
(4)
(5)
With
f = Switching Frequency (2.25MHz typical)
L = Inductor Value
ΔIL= Peak to Peak inductor ripple current
ILmax = Maximum Inductor current
The highest inductor current will occur at maximum Vin.
Open core inductors have a soft saturation characteristic and they can usually handle higher inductor currents
versus a comparable shielded inductor.
A more conservative approach is to select the inductor current rating just for the maximum switch current of the
corresponding converter. It must be considered, that the core material from inductor to inductor differs and will
have an impact on the efficiency especially at high switching frequencies.
Refer to Table 4 and the typical applications for possible inductors.
Table 4. Tested Inductors
INDUCTOR TYPE
RECOMMENDED
INDUCTOR VALUE
SUPPLIER
MAXIMUM DC
CURRENT
LPS3010
0.6 A
2.2 mH
Coilcraft
LPS3015
1.2 A
2.2 mH
Coilcraft
LPS4018
1.5 A
2.2 mH
Coilcraft
VLCF4020
1.5 A
2.2 mH
TDK
Output Capacitor Selection
The advanced Fast Response voltage mode control scheme of the two converters allow the use of small ceramic
capacitors with a typical value of 10mF, without having large output voltage under and overshoots during heavy
load transients. Ceramic capacitors having low ESR values result in lowest output voltage ripple and are
therefore recommended. Please refer to for recommended components.
If ceramic output capacitors are used, the capacitor RMS ripple current rating will always meet the application
requirements. Just for completeness the RMS ripple current is calculated as:
Copyright 2011, Texas Instruments Incorporated
63
相关PDF资料 |
PDF描述 |
|---|---|
| TC151A4924EOA713 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC161B3514EOA723 | 0.25 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC161B1717EOA713 | 0.25 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC161A5520EOA713 | 0.25 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC161A5825EOA713 | 0.25 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS650830EVM-095 | 功能描述:TPS650830 - Power Management, Special Purpose: Mobiles Evaluation Board 制造商:texas instruments 系列:- 零件状态:有效 主要用途:电源管理，专用型： 手机 嵌入式:- 使用的 IC/零件:TPS650830 主要属性:- 辅助属性:图形用户接口，I2C 接口 所含物品:板 标准包装:1 |
| TPS650830ZAJT | 功能描述:- Converter, Mobile PCs Voltage Regulator IC 8 Output 168-NFBGA (7x7) 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 应用:转换器，移动式个人电脑 电压 - 输入:5.4 V ~ 24 V 输出数:8 电压 - 输出:多重 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:168-TFBGA 供应商器件封装:168-NFBGA（7x7） 标准包装:1 |
| TPS650830ZCGT | 功能描述:- Converter, Mobile PCs Voltage Regulator IC 8 Output 159-NFBGA (9x9) 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 应用:转换器，移动式个人电脑 电压 - 输入:5.4 V ~ 24 V 输出数:8 电压 - 输出:多重 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:159-TFBGA 供应商器件封装:159-NFBGA(9x9) 标准包装:1 |
| TPS650860A0RSKT | 功能描述:D-CAP2? Controller, Multicore, CPU, FPGA, SOC’s Voltage Regulator IC 8 Output 64-QFN (8x8) 制造商:texas instruments 系列:D-CAP2?? 包装:剪切带（CT） 零件状态:有效 应用:控制器，多核，CPU，FPGA，SOC 应用 电压 - 输入:4.5 V ~ 21 V 输出数:8 电压 - 输出:多重 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:64-VFQFN 裸露焊盘 供应商器件封装:64-QFN（8x8） 标准包装:1 |
| TPS650860EVM-116 | 功能描述:EVALUATION MODULE 制造商:texas instruments 系列:* 零件状态:在售 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。