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| 型号： | TPS62044DRCR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 6/30页 |
| 文件大小： | 790K |
| 代理商： | TPS62044DRCR |
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TPS62040
TPS62042, TPS62043
TPS62044, TPS62046
SLVS463B JUNE 2003 REVISED OCTOBER 2005
www.ti.com
14
Inductor Selection
The TPS6204x typically uses a 6.2-H output inductor. 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 directly influences the efficiency of the
converter. Therefore an inductor with the lowest dc resistance should be selected for highest efficiency.
Formula (7) 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 formula (7). This is needed
because during heavy load transient the inductor current rises above the value calculated under (7).
DIL + VO
1–
VO
VI
L
ILmax + IO max )
DIL
2
with
= Switching frequency (1.25 MHz typical)
L = Inductor value
IL= Peak-to-peak inductor ripple current
ILmax = Maximum inductor current
The highest inductor current occurs at maximum VI.
Open core inductors have a soft saturation characteristic and they can usually handle higher inductor currents versus
a comparable shielded inductor. A more conservative approach is to select the inductor current rating just for the
maximum switch current of 2.2 A for the TPS6204x. Keep in mind that the core material from inductor to inductor
differs and has an impact on the efficiency, especially at high switching frequencies. Refer to Table 1 and the typical
applications and inductors selection.
Table 1. Inductor Selection
INDUCTOR VALUE
DIMENSIONS
COMPONENT SUPPLIER
4.7 H
5,0 mm × 5,0 mm × 3,0 mm
Sumida CDRH4D28C-4.7
4.7 H
5,2 mm × 5,2 mm × 2,5 mm
Coiltronics SD25-4R7
5.3 H
5,7 mm × 5,7 mm × 3,0 mm
Sumida CDRH5D28-5R3
6.2 H
5,7 mm × 5,7 mm × 3,0 mm
Sumida CDRH5D28-6R2
6.0 H
7,0 mm × 7,0 mm × 3,0 mm
Sumida CDRH6D28-6R0
(6)
(7)
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| TPS62044DRCRG4 | 功能描述:直流/直流开关调节器 1.8V Out 1.2A Hi-Ef Step-Down 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 |
| TPS62046DGQ | 功能描述:直流/直流开关调节器 3.3V Out/1.2A Hi-Eff Step-Down 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 |
| TPS62046DGQG4 | 功能描述:直流/直流开关调节器 3.3V Out/1.2A Hi-Eff Step-Down 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 |
| TPS62046DGQR | 功能描述:直流/直流开关调节器 3.3V Out/1.2A Hi-Eff Step-Down 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 |
| TPS62046DGQR | 制造商:Texas Instruments 功能描述:DC/DC CONVERTER IC 制造商:Texas Instruments 功能描述:IC, STEP-DOWN CONVERTER, MSOP-10 |
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