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參數(shù)資料
| 型號： | TPS65014RGZ |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | POWER AND BATTERY MANAGEMENT IC FOR LI-ION POWERED SYSTEMS |
| 中文描述： | 電源和電池管理集成電路鋰離子供電系統(tǒng) |
| 文件頁數(shù)： | 49/53頁 |
| 文件大?。?/td> | 1021K |
| 代理商： | TPS65014RGZ |
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DESIGN PROCEDURE
Inductor Selection for the Main and the Core Converter
The main and the core converters in the TPS65014 typically use a 6.2-μH and a 10-μH output inductor,
respectively. Larger or smaller inductor values can be used to optimize the performance of the device for specific
operation conditions. The selected inductor has to be rated for its dc resistance and saturation current. The dc
resistance of the inductance influences directly the efficiency of the converter. Therefore, an inductor with lowest
dc resistance is selected for highest efficiency.
IL
VO
1–
VO
VI
L
(3)
IL(max)
IO(max)
IL
2
(4)
Output Capacitor Selection
The advanced fast response voltage mode control scheme of the inductive converters implemented in the
TPS65014 allow the use of small ceramic capacitors with a typical value of 22 μF for the main converter and 10
μF for the core converter without having large output voltage under/overshoots during heavy load transients.
Ceramic capacitors having low ESR values have the lowest output voltage ripple and are recommended. If
required tantalum capacitors with an ESR < 100
R may be used as well.
See Table 5 for recommended components.
TPS65014
SLVS551–DECEMBER 2004
Equation 3 calculates the maximum inductor current under static load conditions. The saturation current of the
inductor should be rated higher than the maximum inductor current as calculated with Equation 3. This is needed
because during heavy load transient, the inductor current rises above the value calculated under Equation 3.
with:
The highest inductor current occurs at maximum V
I
.
Open core inductors have a soft saturation characteristic, and they can usually handle higher inductor currents
versus a comparable shielded inductor.
f = Switching frequency (1.25 MHz typical)
L = Inductor value
I
L
= Peak-to-peak inductor ripple current
I
Lmax
= Maximum inductor current
A more conservative approach is to select the inductor current rating just for the maximum switch current of the
TPS65014 (2 A for the main converter and 0.8 A for the core converter). Keep in mind that the core material from
inductor to inductor differs and has an impact on the efficiency especially at high switching frequencies.
See Table 4 and the typical applications for possible inductors
Table 4. Tested Inductors
DEVICE
INDUCTOR VALUE
10 μH
10 μH
4.7 μH
4.7 μH
4.7 μH
5.3 μH
6.2 μH
6 μH
DIMENSIONS
6 mm
×
6 mm
×
2 mm
5 mm
×
5 mm
×
3 mm
5,5 mm
×
6,6 mm x 1 mm
5 mm
×
5 mm
×
3 mm
5,2 mm
×
5,2 mm
×
2,5 mm
5,7 mm
×
5,7 mm
×
3 mm
5,7 mm
×
5,7 mm
×
3 mm
7 mm
×
7 mm
×
3 mm
COMPONENT SUPPLIER
Sumida CDRH5D18-100
Sumida CDRH4D28-100
Coilcraft LPO1704-472M
Sumida CDRH4D28C-4.7
Coiltronics SD25-4R7
Sumida CDRH5D28-5R3
Sumida CDRH5D28-6R2
Sumida CDRH6D28-6R0
Core converter
Main converter
49
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65014RGZR | 功能描述:電池管理 Li-Ion Powered Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65014RGZRG4 | 功能描述:電池管理 Li-Ion Powered Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65014RGZT | 功能描述:電池管理 Li-Ion Powered Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65014RGZT | 制造商:Texas Instruments 功能描述:POWER M 2.5~6V FOR LI ION P 48QFN 制造商:Texas Instruments 功能描述:POWER M, 2.5~6V, FOR LI ION P, 48QFN |
| TPS65014RGZTG4 | 功能描述:電池管理 Li-Ion Powered Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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