參數(shù)資料
型號： TPS40210QDGQRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10
封裝： GREEN, PLATSIC, MSOP-10
文件頁數(shù)： 21/41頁
文件大小： 999K
代理商： TPS40210QDGQRQ1
( )
OUT(max)
1
Lpeak
RIPPLE(Vinmin)
2
MAX
I
2
I
0.718
6.57 A
1 D
1 0.673
+
=
+
=
-
(
)
2
L
Lrms
P
I
DCR
OUT
(BR)R(min)
OUT
V
1.25 V
1.25 24 V
30 V
0.8
=
=
=
(
)
(
)
D avg
OUT m ax
I
2 A
=
(
)
(
)
D peak
L peak
I
6.57 A
=
D(max)
F
OUT(max)
P
V
I
0.5 V 2 A
1W
=
=
f
OUT
OUT(ripple)
SW
I
D
1
2 A 0.673
1
C
8
35 F
V
500mV
600kHz
=
=
=
m
÷
è
(
)
(
)
OUT ripple
OUT
L peak
V
7
500mV
ESR
95m
8
I
8
6.57 A
2 A
=
=
=
W
-
SLVS861D – AUGUST 2008 – REVISED APRIL 2010
www.ti.com
(39)
A 10-mH inductor with a minimum RMS current rating of 6.13 A and minimum saturation current rating of 6.57 A
must be selected. A TDK RLF12560T-100M-7R5 7.5-A 10-mH inductor is selected.
This inductor power dissipation is estimated by Equation 40.
(40)
The TDK RLF12560T-100M-7R5 12.4-m
DCR dissipates 466 mW of power.
Rectifier Diode Selection
A low-forward voltage drop Schottky diode is used as a rectifier diode to reduce its power dissipation and
improve efficiency. Using 80% derating, on VOUT for ringing on the switch node, the rectifier diode minimum
reverse break-down voltage is given by Equation 41.
(41)
The diode must have reverse breakdown voltage greater than 30 V. The rectifier diode peak and average
currents are estimated by Equation 42 and Equation 43.
(42)
(43)
For this design, 2-A average and 6.57-A peak is
The power dissipation in the diode is estimated by Equation 44.
(44)
For this design, the maximum power dissipation is estimated as 1 W. Reviewing 30-V and 40-V Schottky diodes,
the MBRS340T3 40-V 3-A diode in an SMC package is selected. This diode has a forward voltage drop of 0.48 V
at 6 A, so the conduction power dissipation is approximately 960 mW, less than half its rated power dissipation.
Output Capacitor Selection
Output capacitors must be selected to meet the required output ripple and transient specifications.
(45)
(46)
A Panasonic EEEFC1V330P 35-V 33-mF, 120-m bulk capacitor and 6.8-mF ceramic capacitor is selected to
provide the required capacitance and ESR at the switching frequency. The combined capacitances of 39.8 mF
and 60 m
are used in compensation calculations.
Input Capacitor Selection
Since a boost converter has continuous input current, the input capacitor senses only the inductor ripple current.
The input capacitor value can be calculated by Equation 47 and Equation 48 .
28
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS40210-Q1 TPS40211-Q1
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相關代理商/技術參數(shù)
參數(shù)描述
TPS40210SHKK 功能描述:電流型 PWM 控制器 Wide Inp Range Crnt Mode Boost Contrlr RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
TPS40210SKGD1 功能描述:電流型 PWM 控制器 Wide Inp Range Crnt Mode Boost Contrlr RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
TPS40211 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5-V TO 52-V INPUT CURRENT MODE BOOST CONTROLLER
TPS40211DGQ 功能描述:LED照明驅動器 Wide Input Rnge Crnt Mode Boost Cntrlr RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N
TPS40211DGQ 制造商:Texas Instruments 功能描述:DC/DC Controllers (External Switch) IC 制造商:Texas Instruments 功能描述:IC, BOOST CONTROLLER, MSOP-10
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