Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TPS65320QPWPRQ1 Datasheet(PDF) 23 Page - Texas Instruments

Click here to check the latest version.
Part # TPS65320QPWPRQ1
Description  40-V Step-Down Converter With Eco-mode??Codec and LDO Regulator
Download  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS65320QPWPRQ1 Datasheet(HTML) 23 Page - Texas Instruments

Back Button TPS65320QPWPRQ1 Datasheet HTML 19Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 20Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 21Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 22Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 23Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 24Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 25Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 26Page - Texas Instruments TPS65320QPWPRQ1 Datasheet HTML 27Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 23 / 34 page
background image
out
in min
out
cirms
out
in min
in min
V
(V
V
)
I
I
V
V
-
=
´
´
out
in _ max
out
corms
in _ max
o
SW
V
(V
V
)
I
12
V
L
f
´
-
<
´
´
´
o _ ripple
ESR
L _ ripple
V
R
I
<
out
o _ ripple
SW
L _ ripple
1
1
C
V
8 f
I
>
´
´
2
2
oh
ol
out
o
2
2
f
i
(I
I
)
C
L
(V
V )
-
>
´
-
TPS65320-Q1
www.ti.com
SLVSAY9A – DECEMBER 2012 – REVISED APRIL 2013
(25)
(26)
(27)
(28)
Catch Diode
The TPS65320-Q1 requires an external catch diode between the SW pin and GND. The selected diode must
have a reverse voltage rating equal to or greater than Vinmax. The peak current rating of the diode must be
greater than the maximum inductor current. The diode should also have a low forward voltage. Schottky diodes
are typically a good choice for the catch diode due to their low forward voltage. The lower the forward voltage of
the diode, the higher the efficiency of the regulator.
Typically, the higher the voltage and current ratings the diode has, the higher the forward voltage is. Although the
design example has an input voltage up to 16 V, select a diode with a minimum of 40-V reverse voltage to allow
input voltage transients up to the rated voltage of the TPS65320-Q1 device.
For the example design, the selection of a Schottky diode is B540C-13-F for its lower forward voltage. Also, it
comes in a larger package size, which has good thermal characteristics over small devices. The typical forward
voltage of the B540C-13-F is 0.55 volts.
Also, select a diode with an appropriate power rating. The diode conducts the output current during the off-time
of the internal power switch. The off-time of the internal switch is a function of the maximum input voltage, the
output voltage, and the switching frequency. The output current during the off-time, multiplied by the forward
voltage of the diode, equals the conduction losses of the diode. At higher switching frequencies, take the ac
losses of the diode into account. The ac losses of the diode are due to the charging and discharging of the
junction capacitance and reverse recovery.
Input Capacitor
The TPS65320-Q1 device requires a high-quality ceramic input decoupling capacitor (type X5R or X7R) of at
least 3 µF of effective capacitance, and in some applications a bulk capacitance. The effective capacitance
includes any dc bias effects. The voltage rating of the input capacitor must be greater than the maximum input
voltage. The capacitor must also have a ripple-current rating greater than the maximum input-current ripple of the
TPS65320-Q1. One can calculate the input ripple current using Equation 29.
The value of a ceramic capacitor varies significantly over temperature and the amount of dc bias applied to the
capacitor. One can minimize the capacitance variations due to temperature by selecting a dielectric material that
is stable over temperature. Designers usually select X5R and X7R ceramic dielectrics for power regulator
capacitors because they have a high capacitance-to-volume ratio and are fairly stable over temperature. Also,
select the output capacitor with the dc bias taken into account. The capacitance value of a capacitor decreases
as the dc bias across a capacitor increases.
This example design requires a ceramic capacitor with at least a 40-V voltage rating to support the maximum
input voltage. Common standard ceramic capacitor voltage ratings include 4 V, 6.3 V, 10 V, 16 V, 25 V, 50 V or
100 V, so select a 50-V capacitor. The selection for this example is 4.7-µF, 50-V capacitors in parallel. Table 3
shows a selection of high-voltage capacitors. The input-capacitance value determines the input ripple voltage of
the regulator. One can calculate the input ripple voltage using Equation 30. Using the design example values,
IOUTmax = 3 A, CIN = 4.7 µF, ƒsw = 2200 kHz, yields an input ripple voltage of 72.5 mV and an rms input ripple
current of 1.49 A.
(29)
Copyright © 2012–2013, Texas Instruments Incorporated
Submit Documentation Feedback
23
Product Folder Links: TPS65320-Q1


Similar Part No. - TPS65320QPWPRQ1

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS65320QPWPRQ1 TI1-TPS65320QPWPRQ1 Datasheet
1Mb / 45P
[Old version datasheet]   40-V Step-Down Converter With Eco-mode
More results

Similar Description - TPS65320QPWPRQ1

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS65321-Q1 TI1-TPS65321-Q1 Datasheet
1Mb / 42P
[Old version datasheet]   Step-Down Converter With Eco-mode and LDO Regulator
TPS65320D-Q1 TI1-TPS65320D-Q1 Datasheet
1Mb / 42P
[Old version datasheet]   36-V Step-Down Converter With Eco-mode and LDO Regulator
TPS65320C-Q1 TI1-TPS65320C-Q1_16 Datasheet
1Mb / 41P
[Old version datasheet]   36-V Step-Down Converter With Eco-mode??and LDO Regulator
TPS65321A-Q1 TI1-TPS65321A-Q1 Datasheet
4Mb / 43P
[Old version datasheet]   36-V Step-Down Converter With Eco-mode and LDO Regulator
TPS65320-Q1 TI1-TPS65320-Q1 Datasheet
1Mb / 45P
[Old version datasheet]   40-V Step-Down Converter With Eco-mode
TPS54260-Q1 TI1-TPS54260-Q1 Datasheet
1Mb / 48P
[Old version datasheet]   3.5 V to 60 V STEP DOWN CONVERTER WITH ECO-MODE?
TPS54260QDGQRQ1 TI1-TPS54260QDGQRQ1 Datasheet
2Mb / 50P
[Old version datasheet]   3.5 V to 60 V STEP DOWN CONVERTER WITH ECO-MODE
TPS54260QDGQRQ1 TI-TPS54260QDGQRQ1 Datasheet
2Mb / 50P
[Old version datasheet]   3.5 V to 60 V STEP DOWN CONVERTER WITH ECO-MODE?
LMR14010A TI1-LMR14010A Datasheet
609Kb / 23P
[Old version datasheet]   4-V to 40-V, 1-A Step-Down Converter With High Efficiency Eco-mode
TPS54540-Q1 TI1-TPS54540-Q1_15 Datasheet
2Mb / 44P
[Old version datasheet]   Step-Down DC-DC Converter With Eco-mode
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com