- 您現在的位置：買賣IC網 > PDF目錄98281 > TPS40131RHBR (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 PDF資料下載
參數資料
| 型號： | TPS40131RHBR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封裝： | GREEN, PLASTIC, QFN-32 |
| 文件頁數： | 13/40頁 |
| 文件大?。?/td> | 940K |
| 代理商： | TPS40131RHBR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
www.ti.com
f
OUT
RIPPLE
OUT
sw
V
I
(D)
4.04 A
L
=
D
=
(19)
f
RIPPLE
RIPPLE(TotOUT)
RIPPLE(COUT)
OUT
SW
Co
RIPPLE
I
V
8
C
ESR
I
-
÷
-
è
=
(20)
Step 3: Input Capacitor Selection
f
OUT
IN(min)
RIPPLE(CIN)
IN
SW
I
V
C
V
=
(21)
( )
(
)
RIPPLE(CinESR )
Cin
1
OUT
RIPPLE
2
V
ESR
I
=
+
(22)
IN
OUT
I
(D)
D
(0.5
D)
I
D
=
-
(23)
Step 4: MOSFET Selection
(
)
(
)
2
RIPPLE
SW rms
OUT
I
D
I
7.08
12
÷
=
+
=
÷
è
(24)
(
)
2
SWcond
SWrms
DS(on)(sw )
P
I
R
0.467 W
=
=
(25)
SLVS635 – FEBRUARY 2007
With 1.08-mF output capacitance, the ripple voltage at the capacitor is calculated to be 1.34 mV. In the
specification, the output ripple voltage should be less than 30 mV, so based on the following equation, the
required maximum ESR is 7.1 m
. The selected capacitors can meet this requirement.
The input voltage ripple depends on input capacitance and ESR. The minimum capacitor and the maximum ESR
can be estimated using Equation 21.
For this design, assume VRIPPLE(Cin) is 60 mV and VRIPPLE(CinESR) is 30 mV, so the calculated minimum
capacitance is 120-
μF and the maximum ESR is 1.35 m
. Choosing six 22-μF, 16V, 2-m ESR ceramic
capacitors meets this requirement.
Another important thing for the input capacitor is the RMS ripple current rating. Due to the interleaving of
multi-phase, the input RMS current is reduced. The input ripple current RMS value over load current is
calculated using Equation 23.
So in this design, the maximum input ripple RMS current is calculated to be 8.96 A with the minimum input
voltage. It is about 35% reduction compared with a 40-A single-phase converter design. Each selected ceramic
capacitor has a RMS current rating of 4.3 A, so it is sufficient to meet this requirement.
The MOSFET selection determines the converter efficiency. In this design, the duty cycle is very small so that
the high-side MOSFET is dominated with switching losses and the low-side MOSFET is dominated with
conduction loss. To optimize the efficiency, choose smaller gate charge for the high-side MOSFET and smaller
RDS(on) for the low-side MOSFET. Renesas HAT2167H and HAT2164H are selected as the high-side and
low-side MOSFET respectively.
In the following calculations, only the losses for one phase are shown. The power losses in the high-side
MOSFET is calculated with the following equations.
The RMS current in the high-side MOSFET is shown in Equation 24.
The RDS(on)(sw) is 9.3 m when the MOSFET gate voltage is 4.5 V. The conduction loss is shown in Equation 25.
The switching loss is shown in Equation 26.
20
相關PDF資料 |
PDF描述 |
|---|---|
| TPS40132RHBR | 40 A SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| TPS40197RGYR | SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, PQCC16 |
| TPS40200MDREPG4 | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS40211DRCTG4 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40210DGQG4 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS40131RHBRG4 | 功能描述:DC/DC 開關控制器 Two-Phase Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40131RHBT | 功能描述:DC/DC 開關控制器 2-Ph Synch Buck Cntr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40131RHBT | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu 制造商:Texas Instruments 功能描述:IC, SYNC BUCK CONTROLLER, QFN-32 |
| TPS40131RHBTG4 | 功能描述:DC/DC 開關控制器 Two-Phase Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40132 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:TWO-PHASE, SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED MOSFET DRIVERS |
發布緊急采購，3分鐘左右您將得到回復。