參數(shù)資料
型號： TPS61107RGE
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.8 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PQCC24
封裝： PLASTIC, QFN-24
文件頁數(shù)： 13/34頁
文件大?。?/td> 798K
代理商： TPS61107RGE
www.ti.com
L +
V
BAT
V
OUT
–V
BAT
DIL
V
OUT
(6)
CAPACITOR SELECTION
Input Capacitor
Output Capacitor Boost Converter
C
min +
I
OUT
V
OUT *
V
BAT
DV
V
OUT
(7)
TPS61100, TPS61103
TPS61106, TPS61107
SLVS411B – JUNE 2002 – REVISED APRIL 2004
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 6:
Parameter 0 is the switching frequency and
I
L is the ripple current in the inductor, i.e., 20% × IL. In this example,
the desired inductor has the value of 12 H. With this calculated value and the calculated currents, it is possible
to choose a suitable inductor. 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.
Table 1. Inductors
VENDOR
RECOMMENDED INDUCTOR SERIES
CDRH73
CDRH74
Sumida
CDRH5D18
CDRH6D38
DR73
Coiltronics
DR74
LQS66C
Murata
LQN6C
SLF 7045
TDK
SLF 7032
WE-PD Type M
Wurth Electronic
WE-PD Type S
At least a 10-F input capacitor is recommended to improve transient behavior of the regulator and EMI behavior
of the total power supply circuit. A ceramic capacitor or a tantalum capacitor with a 100-nF ceramic capacitor in
parallel, placed close to the IC, is recommended.
The major parameter necessary to define the output capacitor is the maximum allowed output voltage ripple of
the converter. This ripple is determined by two parameters of the capacitor, the capacitance and the ESR. It is
possible to calculate the minimum capacitance needed for the defined ripple, supposing that the ESR is zero, by
using Equation 7:
Parameter f is the switching frequency and
V is the maximum allowed ripple.
20
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS61107RGER 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V Boost Cnvrtr w/1.8V 120mA LDO RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS61107RGERG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V Boost Cnvrtr w/1.8V 120mA LDO RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS61120 制造商:TI 制造商全稱:Texas Instruments 功能描述:SYNCHRONOUS BOOST CONVERTER WITH 1.1A SWITCH AND INTEGRATED LDO
TPS61120EVM-205 功能描述:電源管理IC開發(fā)工具 TPS61120-205 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS61120PW 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj Hi-Eff Boost Cnvrtr w/200mA LDO RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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