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參數(shù)資料
| 型號： | TPS63000IDRCRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.1 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 3/19頁 |
| 文件大?。?/td> | 538K |
| 代理商： | TPS63000IDRCRQ1 |
Inductor Selection
L
1 +
V
OUT
V
IN1 * VOUT
V
IN1
f
0.3 A
(3)
L
2 +
V
in2
V
OUT * VIN2
V
OUT
f
0.3 A
(4)
I
1 +
I
OUT
0.8 )
V
OUT VIN1 * VOUT
2
V
IN1
f
L
(5)
I
2 +
V
OUT
I
OUT
0.8
V
IN2
)
V
IN2
V
OUT * VIN2
2
V
OUT
f
L
(6)
Capacitor Selection
Input Capacitor
www.ti.com ...................................................................................................................................................................................................... SLVS968 – JUNE 2009
To properly configure the TPS63000 devices, an inductor must be connected between pin L1 and pin L2. To
estimate the inductance value Equation 3 and Equation 4 can be used.
In both equations f is the minimum switching frequency. In Equation 3 the minimum inductance value, L1 for step
down mode operation is calculated. VIN1 is the maximum input voltage. In Equation 4 the minimum inductance,
L2, for boost mode operation is calculated. VIN2 is the minimum input voltage. The recommended minimum
inductor value is either L1 or L2 whichever is higher. As an example, a suitable inductor for generating 3.3 V from
a Li-Ion battery with a battery voltage range from 2.5 V up to 4.2 V is 2.2
H. The recommended inductor value
range is between 1.5
H and 4.7 H. In general, this means that at high voltage conversion rates, higher inductor
values offer better performance.
With the chosen inductance value, the peak current for the inductor in steady state operation can be calculated.
Equation 5 shows how to calculate the peak current I1 in step down mode operation and Equation 6 shows how
to calculate the peak current I2 in boost mode operation.
The critical current value for selecting the right inductor is the higher value of I1 and I2. It also needs to be taken
into account that load transients and error conditions may cause higher inductor currents. This also needs to be
taken into account when selecting an appropriate inductor. The following inductor series from different suppliers
have been used with TPS63000 converters:
Table 1. List of Inductors
VENDOR
INDUCTOR SERIES
LPS3015
Coilcraft
LPS4012
Murata
LQH3NP
Tajo Yuden
NR3015
VLF3215
TDK
VLF4012
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.
Copyright 2009, Texas Instruments Incorporated
11
Product Folder Link(s): TPS63000-Q1
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| TPS63001DRCRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 96% Buck-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 |
| TPS63001DRCT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 96% Buck-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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