參數(shù)資料
型號： TPS55383PWPRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16
封裝： PLASTIC, HTSSOP-26
文件頁數(shù)： 26/45頁
文件大?。?/td> 1318K
代理商： TPS55383PWPRG4
(
)
(
)
1
RIPPLE
L1 peak
OUT1 max
2
I
3.0 A
0.661A
3.3 A
+
=
+
=
(32)
(
)
(
)
1
RIPPLE
L2 peak
OUT2 max
2
I
3.0 A
0.547 A
3.3 A
+
=
+
=
(33)
(
) (
)
(
)
(
)
IN max
BR R min
IN max
V
1.25
V
1.25 13.2 V
16.5 V
0.8
=
=
=
(34)
(
)
(
)
(
)
MIN1
D1 avg
OUT1 max
I
1 D
3.0 A
(1
0.397)
1.81A
-
=
-
=
(35)
(
)
(
)
(
)
MIN2
D2 avg
OUT2 max
I
1 D
3.0 A
(1
0.272)
2.18 A
-
=
-
=
(36)
(
)
(
)
D peak
L peak
I
=
(37)
(
)
(
)
FM
D1 max
D1 avg
P
V
I
0.4 V
1.81
0.72 W
=
(38)
D2(max)
FM
D2(avg)
P
V
I
0.4V
2.18
0.87W
=
(39)
(
)
(
)
(
)
(
)
(
)
2
TRAN MAX
OUT1 min
OUT1
OVER
I
L
1A
8.2 H
C
8.2 F
5.0 V
0.2 V
V
m
=
m
(40)
(
)
(
)
(
)
(
)
(
)
2
TRAN MAX
OUT2 min
OUT2
OVER
I
L
1A
8.2 H
C
12.4 F
3.3 V
0.2 V
V
m
=
m
(41)
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
A DC current with 30% peak to peak ripple has an RMS current approximately 0.4% above the average current.
The peak inductor current is estimated by:
An 8.2-
H inductor with a minimum RMS current rating of 3.0 A and minimum saturation current rating of 3.3 A
must be selected. A Coilcraft MSS1048-822ML 8.2-
H, 4.38-A inductor is chosen for both outputs.
Rectifier Diode Selection
A low forward voltage drop schottky diode is used as a rectifier diode to minimize power dissipation and
maximize efficiency.
Allowing 20% over VIN for ringing on the switch node, the rectifier diode’s minimum reverse break-down voltage
is given by:
Reviewing 20-V and 30-V schottky diodes, the MBRS330T3, 30-V, 3-A diodes in an SMC package are selected
for both channels. This diode has a forward voltage drop of 0.4 V at 3 A, so the conduction power dissipation is:
For this design, the maximum power dissipation is estimated as 0.72 W and 0.87 W respectively.
Output Capacitor Selection
Output capacitors are selected to support load transients and output ripple current. The minimum output
capacitance to meet the transient specification is given by:
32
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS55383 TPS55386
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS55386EVM-363 功能描述:電源管理IC開發(fā)工具 TPS55386EVM-363 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
TPS55386PWP 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Dual Non-Synch Buck 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
TPS55386PWPG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A,Dual Non-Synch Buck 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
TPS55386PWPR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Dual Non-Synch Buck 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
TPS55386PWPRG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A,Dual Non-Synch Buck 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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