- 您现在的位置：买卖IC网 > PDF目录14673 > LM2735XSD/NOPB (National Semiconductor)IC REG BOOST SEPIC ADJ 2.1A 6LLP PDF资料下载
参数资料
| 型号： | LM2735XSD/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 17/58页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SEPIC ADJ 2.1A 6LLP |
| 标准包装： | 1 |
| 类型： | 升压（升压），Sepic |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3 V ~ 24 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.6MHz |
| 电流 - 输出： | 2.1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 6-LLP-EP（3x3） |
| 产品目录页面： | 1299 (CN2011-ZH PDF) |
| 配用： | LM2735SD3.3EVAL-ND - BOARD EVALUATION FOR LM2735 |
| 其它名称： | LM2735XSDDKR |
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页当前第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
SNVS485F – JUNE 2007 – REVISED APRIL 2013
Definitions
Heat energy is transferred from regions of high temperature to regions of low temperature via three basic
mechanisms: radiation, conduction and convection.
Radiation Electromagnetic transfer of heat between masses at different temperatures.
Conduction Transfer of heat through a solid medium.
Convection Transfer of heat through the medium of a fluid; typically air.
Conduction & Convection will be the dominant heat transfer mechanism in most applications.
R θ JC Thermal impedance from silicon junction to device case temperature.
R θ JA Thermal impedance from silicon junction to ambient air temperature.
C θ JC Thermal Delay from silicon junction to device case temperature.
C θ CA Thermal Delay from device case to ambient air temperature.
R θ JA & R θ JC These two symbols represent thermal impedances, and most data sheets contain associated values
for these two symbols. The units of measurement are °C/Watt.
R θ JA is the sum of smaller thermal impedances (see Figure 27 ). The capacitors represent delays that are present
from the time that power and its associated heat is increased or decreased from steady state in one medium until
the time that the heat increase or decrease reaches steady state on the another medium.
R T C - A
C T C - A
T C
R T J- CASE
C T J- CASE
T A
T J
Internal - P DISS
Figure 27. Simplified Thermal Impedance Model
The datasheet values for these symbols are given so that one might compare the thermal performance of one
package against another. In order to achieve a comparison between packages, all other variables must be held
constant in the comparison (PCB size, copper weight, thermal vias, power dissipation, V IN , V OUT , Load Current
etc). This does shed light on the package performance, but it would be a mistake to use these values to calculate
the actual junction temperature in your application.
R T JA =
T J - T A
P Dissipatio n
(17)
We will talk more about calculating the variables of this equation later, and how to eventually calculate a proper
junction temperature with relative certainty. For now we need to define the process of calculating the junction
temperature and clarify some common misconceptions.
R θ JA [Variables]:
?
?
?
?
Input Voltage, Output Voltage, Output Current, RDSon.
Ambient temperature & air flow.
Internal & External components power dissipation.
Package thermal limitations.
Copyright ? 2007–2013, Texas Instruments Incorporated
Product Folder Links: LM2735
17
相关PDF资料 |
PDF描述 |
|---|---|
| 2100HT-680-H-RC | INDUCTOR TOROID 68UH 15% HORZ |
| GSM06DRMD-S273 | CONN EDGECARD 12POS .156 SQ WW |
| 2100HT-5R6-V-RC | INDUCTOR TOROID 5.6UH 15% VERT |
| LM2735YSD/NOPB | IC REG BOOST SEPIC ADJ 2.1A 6LLP |
| GMM06DRMD-S273 | CONN EDGECARD 12POS .156 SQ WW |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2735XSDX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator |
| LM2735XSDX/NOPB | 功能描述:直流/直流开关调节器 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 |
| LM2735YMF | 功能描述:直流/直流开关调节器 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 |
| LM2735YMF/NOPB | 功能描述:直流/直流开关调节器 SPACE-EFF BOOST AND SEPIC DC-DC REG 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 |
| LM2735YMFEVAL | 功能描述:电源管理IC开发工具 LM2735YMF EVAL BOARD 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。