參數(shù)資料
型號(hào)： TPS65021RHARG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40
封裝： 6 X 6 MM, GREEN, PLASTIC, MO-220/VJJD-2, QFN-40
文件頁數(shù)： 30/47頁
文件大?。?/td> 1180K
代理商： TPS65021RHARG4
www.ti.com
DESIGN PROCEDURE
Inductor Selection for the DC-DC Converters
DIL + Vout
1 *
Vout
Vin
L
(4)
I
Lmax +
Ioutmax )
DIL
2
(5)
SLVS613B – OCTOBER 2005 – REVISED JULY 2007
LDO_CTRL. Register Address: 08h (read/write)
Default Value: set with DEFLDO1 and DEFLDO2
LDO_CTRL
B7
B6
B5
B4
B3
B2
B1
B0
Bit name and
LDO2_2
LDO2_1
LDO2_0
LDO1_2
LDO1_1
LDO1_0
function
Default
DEFLDOx
Default value
UVLO
loaded by:
Read/Write
R/W
The LDO_CTRL registers can be used to set the output voltage of LDO1 and LDO2.
The default voltage is set with DEFLDO1 and DEFLDO2 pins as described in Table 3.
LDO1 OUTPUT
LDO2 OUTPUT
LDO1_2
LDO1_1
LDO1_0
LDO2_2
LDO2_1
LDO2_0
VOLTAGE
0
1 V
0
1.05 V
0
1
1.1 V
0
1
1.2 V
0
1
0
1.35 V
0
1
0
1.3 V
0
1
1.5 V
0
1
1.8 V
1
0
2.2 V
1
0
2.5 V
1
0
1
2.6 V
1
0
1
2.8 V
1
0
2.85 V
1
0
3 V
1
3.15 V
1
3.3 V
Each of the converters in the TPS65021 typically use a 3.3
μH output inductor. Larger or smaller inductor values
are 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 should be selected for highest
efficiency.
For a fast transient response, a 2.2-
μH inductor in combination with a 22-μF output capacitor is recommended.
Equation 4 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 4. This is
needed because during heavy load transient the inductor current rises above the value calculated under
with:
f = Switching Frequency (1.5 MHz typical)
L = Inductor Value
ΔIL = Peak-to-Peak inductor ripple current
ILMAX = Maximum Inductor current
The highest inductor current occurs at maximum Vin.
Open core inductors have a soft saturation characteristic, and they can usually handle higher inductor currents
versus a comparable shielded inductor.
36
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65021RHAT 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion 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
TPS65021RHATG4 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion 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
TPS65022RHAR 功能描述:電池管理 Pwr Mgmt IC for Li-Ion Pwred Sys 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
TPS65022RHARG4 功能描述:電池管理 Pwr Mgmt IC for Li-Ion Pwred Sys 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
TPS65022RHAT 功能描述:電池管理 Pwr Mgmt IC for Li-Ion Pwred Sys 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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