- 您现在的位置：买卖IC网 > PDF目录68613 > TPS51727RHARG4 (TEXAS INSTRUMENTS INC) DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC40 PDF资料下载
参数资料
| 型号： | TPS51727RHARG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封装： | 6 X 6 MM, GREEN, PLASTIC, QFN-40 |
| 文件页数： | 22/42页 |
| 文件大小： | 0K |
| 代理商： | TPS51727RHARG4 |
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页当前第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
MAX
P P
SAT
PHASE
I
1.5
36 A
N
2
-
=
+
=
÷
è
(9)
I
UDG-07188
CSN
L
R
DCR
R
NTC
R
PAR
C
SENSE
R
SERIES
R
SEQU
CSP
SENSE
EQ
DCR
L
C
R
=
(10)
www.ti.com ..................................................................................................................................................... SLUS806B – APRIL 2008 – REVISED JANUARY 2009
To allow for inductor tolerances, 0.36
H is chosen. The inductor must not saturate during peak loading
conditions.
The factor of 1.5 allows for current sensing and current limiting tolerances. The chosen inductor should have the
following characteristics:.
1. Create an inductance vs. current curve that is as flat as possible. Inductor DCR sensing is based on the idea
L/DCR is approximately a constant through the current range of interest.
2. Either high saturation or “soft saturation”.
3. Low DCR for improved efficiency, but at least 0.7 m
Ω for proper signal levels.
4. DCR tolerance as low as possible for load-line accuracy.
For this application, a 0.36-H, 1.2-m
Ω inductor is chosen
Step Five
Design the thermal compensation network. In most designs, NTC thermistors are used to compensate thermal
variations in the resistance of the inductor winding. This winding is generally copper, and so has a resistance
coefficient of 3900 PPM/C. NTC thermistors, on the other hand, have very non-linear characteristics and need
two or three resistors to linearize them over the range of interest. The typical DCR circuit is shown in Figure 31.
Figure 31. Typical DCR Sensing Circuit
In this circuit, good performance is obtained when:
In Equation 10, all of the parameters are defined in Figure 26 except REQ, which is the series/parallel
combination of the other four discrete resistors. CSENSE should be a capacitor type which is stable over
temperature; use X7R or better dielectric (C0G preferred).
Copyright 2008–2009, Texas Instruments Incorporated
29
Product Folder Link(s): TPS51727
相关PDF资料 |
PDF描述 |
|---|---|
| TPS54312QPWPRQ1 | 7.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| TPS54316QPWPRQ1 | 7.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| TPS54315QPWPRQ1 | 7.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| TPS54313QPWPRQ1 | 7.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| TPS54311QPWPRQ1 | 7.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS51727RHAT | 功能描述:DC/DC 开关控制器 Dual-Ph Eco-Mode Stp Down Pwr Mgmt IC 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 |
| TPS51727RHATG4 | 功能描述:DC/DC 开关控制器 2Ph Eco-Mode Step Down Pwr Mgmt IC 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 |
| TPS51728RHAR | 制造商:Texas Instruments 功能描述:DUAL PHASE MANAGEMENT IC FOR APPLICATION 制造商:Texas Instruments 功能描述:CONTROLLER-NON VMI |
| TPS5172RHAR | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL-PHASE, ECO-MODE⑩ STEP-DOWN POWER MANAGEMENT IC FOR 50-A+ APPLICATIONS |
| TPS5172RHAT | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL-PHASE, ECO-MODE⑩ STEP-DOWN POWER MANAGEMENT IC FOR 50-A+ APPLICATIONS |
发布紧急采购，3分钟左右您将得到回复。