- 您现在的位置：买卖IC网 > PDF目录231088 > TPS61026DRCTG4 (TEXAS INSTRUMENTS INC) 2.1 A SWITCHING REGULATOR, 720 kHz SWITCHING FREQ-MAX, PDSO10 PDF资料下载
参数资料
| 型号： | TPS61026DRCTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.1 A SWITCHING REGULATOR, 720 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 8/29页 |
| 文件大小： | 746K |
| 代理商： | TPS61026DRCTG4 |
第1页第2页第3页第4页第5页第6页第7页当前第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
www.ti.com
R1 + R2
V
BAT
V
LBI*threshold
* 1 + 390 kW
V
BAT
500 mV *
1
(3)
INDUCTOR SELECTION
I
L +
I
OUT
V
OUT
V
BAT
0.8
(4)
L +
V
BAT
V
OUT
–V
BAT
DIL
V
OUT
(5)
SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006
The output of the low battery supervisor is a simple open-drain output that goes active low if the dedicated
battery voltage drops below the programmed threshold voltage on LBI. The output requires a pullup resistor with
a recommended value of 1 M
. If not used, the LBO pin can be left floating or tied to GND.
A boost converter normally requires two main passive components for storing energy during the conversion. A
boost inductor and a storage capacitor at the output are required. To select the boost inductor, it is
recommended to keep the possible peak inductor current below the current limit threshold of the power switch in
the chosen configuration. For example, the current limit threshold of the TPS6102xs switch is 1800 mA at an
output voltage of 5 V. The highest peak current through the inductor and the switch depends on the output load,
the input (VBAT), and the output voltage (VOUT). Estimation of the maximum average inductor current can be done
using Equation 4:
For example, for an output current of 200 mA at 3.3 V, at least 920 mA of average current flows through the
inductor at a minimum input voltage of 0.9 V.
The second parameter for choosing the inductor is the desired current ripple in the inductor. Normally, it is
advisable to work with a ripple of less than 20% of the average inductor current. A smaller ripple reduces the
magnetic hysteresis losses in the inductor, as well as output voltage ripple and EMI. But in the same way,
regulation time at load changes rises. In addition, a larger inductor increases the total system costs. With those
parameters, it is possible to calculate the value for the inductor by using Equation 5:
Parameter f is the switching frequency and
ΔIL is the ripple current in the inductor, i.e., 20% × IL. In this example,
the desired inductor has the value of 5.5 H. With this calculated value and the calculated currents, it is possible
to choose a suitable inductor. In typical applications a 6.8 H inductance is recommended. The device has been
optimized to operate with inductance values between 2.2 H and 22 H. Nevertheless operation with higher
inductance values may be possible in some applications. Detailed stability analysis is then recommended. Care
has to be taken that load transients and losses in the circuit can lead to higher currents as estimated in
Equation 5. Also, the losses in the inductor caused by magnetic hysteresis losses and copper losses are a major
parameter for total circuit efficiency.
The following inductor series from different suppliers have been used with the TPS6102x converters:
Table 1. List of Inductors
VENDOR
INDUCTOR SERIES
CDRH4D28
Sumida
CDRH5D28
7447789
Wurth Elektronik
744042
EPCOS
B82462-G4
SD25
Cooper Electronics Technologies
SD20
16
Copyright 2003–2006, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| TC151B5012EOA713 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151B5714EOA723 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151B5219EOA723 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151B2025EOA713 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151B2025EOA723 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS61027 | 制造商:TI 制造商全称:Texas Instruments 功能描述:96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH |
| TPS61027DRC | 制造商:TI 制造商全称:Texas Instruments 功能描述:96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH |
| TPS61027DRCR | 功能描述:直流/直流开关调节器 5-V Otp 1.5-A Swit Boost Converter 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 |
| TPS61027DRCR | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| TPS61027DRCRG4 | 功能描述:直流/直流开关调节器 5-V Otp 1.5-A Swit Boost Converter 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 |
发布紧急采购，3分钟左右您将得到回复。