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參數(shù)資料
| 型號： | TPS61103RGE |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DUAL-OUTPUT, SINGLE-CELL BOOST CONVERTER |
| 中文描述： | 雙輸出，單電池升壓變換器 |
| 文件頁數(shù)： | 20/28頁 |
| 文件大小： | 507K |
| 代理商： | TPS61103RGE |
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L
VBAT
VOUT–VBAT
VOUT
IL
(6)
CAPACITOR SELECTION
Input Capacitor
Output Capacitor Boost Converter
Cmin
IOUT
VOUT
V
VBAT
VOUT
(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%
×
I
L
. In this example,
the desired inductor has the value of 12 μH. 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
CDRH5D18
CDRH6D38
DR73
DR74
LQS66C
LQN6C
SLF 7045
SLF 7032
WE-PD Type M
WE-PD Type S
Sumida
Coiltronics
Murata
TDK
Wurth Electronic
At least a 10-μF 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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|---|---|
| TPS61103RGER | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V Hi-Eff Boost Cnvrtr w/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 |
| TPS61103RGERG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V Hi-Eff Boost Cnvrtr w/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 |
| TPS61106 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DUAL-OUTPUT, SINGLE-CELL BOOST CONVERTER |
| TPS61106EVM-216 | 功能描述:電源管理IC開發(fā)工具 TPS61106-216 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 |
| TPS61106PW | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V Hi-Eff Boost Converter 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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