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参数资料
| 型号： | TPS61200DRCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 8/28页 |
| 文件大小： | 1012K |
| 代理商： | TPS61200DRCRG4 |
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INMIN
UVLO
V
R3 = R4 x
- 1
V
÷
÷
è
(2)
Inductor Selection
MIN
IN
s
L
= V
x 0.5
A
m
(3)
(
)
IN
OUT
IN
OUT
LMAX
IN
OUT
V
x
V
x I
I
=
+
0.8 x V
2 x V
x f x L
-
(4)
Capacitor Selection
Input Capacitor
Output Capacitor
OUT
F
C
= 5 x L x
H
m
(5)
SLVS577B – MARCH 2007 – REVISED FEBRUARY 2008
To make sure that the TPS6120X devices can operate, an inductor must be connected between pin VIN and pin
L. To estimate the minimum inductance value Equation 3 can be used.
In Equation 3, the minimum inductance, LMIN, for boost mode operation is calculated. VIN is the maximum input
voltage. The recommended inductor value range is between 1.5
H and 4.7 H. The minimum inductor value
should not be below 1.5
H, even if Equation 3 yields in something lower. Using 2.2 H is recommended anyway
for getting best performance over the whole input and output voltage range.
With the chosen inductance value, the peak current for the inductor in steady state operation can be calculated.
Equation 4 shows how to calculate the peak current I.
This would be the critical value for the current rating for selecting the inductor. It also needs to be taken into
account that load transients and error conditions may cause higher inductor currents. The following inductor
series from different suppliers have been used with TPS6120x converters:
Table 1. List of Inductors
VENDOR
INDUCTOR SERIES
LPS3015
Coilcraft
LPS4012
Murata
LQH3NP
Tajo Yuden
NR3015
Wurth Elektronik
WE-TPC Typ S
At least a 4.7
F input capacitor is recommended to improve transient behavior of the regulator and EMI
behavior of the total power supply circuit. A ceramic capacitor placed as close as possible to the VIN and PGND
pins of the IC is recommended.
For the output capacitor, it is recommended to use small ceramic capacitors placed as close as possible to the
VOUT and PGND pins of the IC. If, for any reason, the application requires the use of large capacitors which can
not be placed close to the IC, using a smaller ceramic capacitor in parallel to the large one is recommended.
This small capacitor should be placed as close as possible to the VOUT and PGND pins of the IC.
To get an estimate of the recommended minimum output capacitance, Equation 5 can be used.
A capacitor with a value in the range of the calculated minimum should be used. This is required to maintain
control loop stability. There are no additional requirements regarding minimum ESR. There is also no upper limit
for the output capacitance value. Larger capacitors cause lower output voltage ripple as well as lower output
voltage drop during load transients.
16
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS61200 TPS61201 TPS61202
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相关代理商/技术参数 |
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| TPS61200DRCT | 功能描述:直流/直流开关调节器 0.3V In Vltg Boost 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 |
| TPS61200DRCT | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter (DC-DC) IC 制造商:Texas Instruments 功能描述:IC, SYNC BOOST CONVERTER, SON-10 |
| TPS61200DRCTG4 | 功能描述:直流/直流开关调节器 0.3V Input Vltg 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 |
| TPS61200EVM-179 | 功能描述:电源管理IC开发工具 TPS61200EVM-179 Evaluation Module 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 |
| TPS61201 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW INPUT VOLTAGE SYNCHRONOUS BOOST CONVERTER WITH 1.3-A SWITCHES |
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