- 您现在的位置：买卖IC网 > PDF目录69509 > TPS40130RHBR (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 PDF资料下载
参数资料
| 型号： | TPS40130RHBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封装： | GREEN, PLASTIC, QFN-32 |
| 文件页数： | 13/38页 |
| 文件大小： | 950K |
| 代理商： | TPS40130RHBR |
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页当前第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
www.ti.com
Inductor DCR Current Sense
V
DCR + VIN * VOUT
DCR
DCR ) w
L
(23)
V
C + VIN * VOUT
1
w
C
R
CS )
1
w
C
(24)
V
C +
1
w
C
R
CS )
1
w
C
+
DCR
DCR ) w
L
;
L
DCR +
R
CS
C;
t
DCRL +
t
RC
(25)
VOUT
VC
Switch
Node
UDG03142
L
DCR
C
VDCR
RCS
CS
CSRT
C
L
DCR
CSRT
CS
R
0.1%
R
0.1%
R
0.1%
R
0.1%
UDG05079
RCS
VDCR
Switch
Node
VOUT
VC
Inductor DCR Current Sensing with 5-V Outputs
SLUS602B – JUNE 2004 – REVISED SEPTEMBER 2005
Inductor DCR current sensing is a known lossless technique to retrieve current proportional signal. Referring to
At any given frequency the DCR voltage can be calculated using Equation 23 and Equation 24.
Voltage across the capacitor is equal to voltage drop across the inductor DCR, VC=VDCR when time constant of
the inductor and the time constant of the RC network are equal, see Equation 25. Setting the value of the
capacitor to 0.1 F or 0.01 F provides for reasonable resistor values.
The output signal generated by the network shown in Figure 11 is temperature dependent due to positive
thermal coefficient of copper specific resistance KT=1+0.0039 ×(T-25). The temperature variation of the inductor
coil can easily exceed 100°C in a practical application leading to approximately 40% variation in the output
signal and, in turn, respectively moving the overcurrent threshold and the load line.
Figure 11. Inductor Current Sense Configuration
Figure 12. Inductor Current Sense Configuration
for 1.2-V Output
for 5-V Output
Due to the current sense operational amplifier input common mode voltage range, it is necessary to divide the
current sense information before connecting to the TPS40130 current sense pins (CS1, CSRT1, CS2 and
CSRT2). Figure 12 shows how this is achieved. RCS and C are selected as normal using the method described
in Equation 24 and Equation 25. The divider resistors (R) are chosen to be much smaller than RCS. They are
typically 100 times smaller. However, if these resitors are too small, they may dissipate too much power. In that
case, choose a smaller capacitance value, and select a new RCS. The resistors used in the divider should be
precision resistors each having the same value.
20
相关PDF资料 |
PDF描述 |
|---|---|
| TPS40130RHBRG4 | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| TPS40130RHB | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| TPS40140RHHTG4 | 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC36 |
| TPS40140RHHT | 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC36 |
| TPS40140RHHR | 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC36 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40130RHBRG4 | 功能描述:DC/DC 开关控制器 2-Ch Multiphase Buck DC/DC w/Int Drvr 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 |
| TPS40130RHBT | 功能描述:DC/DC 开关控制器 2-Ch Multiphase Buck DC/DC w/Int Drvr 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 |
| TPS40130RHBTG4 | 功能描述:DC/DC 开关控制器 2-Ch Multiphase Buck DC/DC w/Int Drvr 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 |
| TPS40131 | 制造商:TI 制造商全称:Texas Instruments 功能描述:TWO-PHASE, SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED MOSFET DRIVERS |
| TPS40131EVM | 功能描述:电源管理IC开发工具 TPS40131 Eval 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。