Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TPS40322 Datasheet(PDF) 23 Page - Texas Instruments

Part No. TPS40322
Description  Dual Output or Two-Phase Synchronous Buck Controller
Download  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS40322 Datasheet(HTML) 23 Page - Texas Instruments

Back Button TPS40322_15 Datasheet HTML 19Page - Texas Instruments TPS40322_15 Datasheet HTML 20Page - Texas Instruments TPS40322_15 Datasheet HTML 21Page - Texas Instruments TPS40322_15 Datasheet HTML 22Page - Texas Instruments TPS40322_15 Datasheet HTML 23Page - Texas Instruments TPS40322_15 Datasheet HTML 24Page - Texas Instruments TPS40322_15 Datasheet HTML 25Page - Texas Instruments TPS40322_15 Datasheet HTML 26Page - Texas Instruments TPS40322_15 Datasheet HTML 27Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 23 / 42 page
background image
(
)
(
)
RIPPLE1
OC
OUT1
I
2.5 A
V
I
1.2
DCR
1.2
10 A
1.2
3.15 m
1.2
51.05 mV
2
2
é
ù
é
ù
æ
ö
æ
ö
=
+
´
´
´
=
+
´
´
W ´
=
ê
ú
ê
ú
ç
÷
ç
÷
è
ø
è
ø
ë
û
ë
û
(
)
(
)
(
)
=
´
´
´
DCR
L peak
V
DCR 1.2
I
1.3
(
)
(
)
(
)
´
=
-
CS max
DCR
CS max
R13
V
R15
V
V
m
=
=
=
W
´
m ´
W
DCR
L1
0.88 H
R13
2.8 k
C
V
0.1 F
3.15 m
OUT1
IN(min)
V
D
V
=
(
)
(
)
OUT1
RMS cin1
I
I
D
1 D
10 A
0.15 (1 0.15)
3.57 A
=
´
´
-
=
´
´
-
=
(
)
RIPPLE(esr)
MAX
1
OUT1
RIPPLE1
2
V
50mV
ESR
4.44m
11.25 A
I
I
=
=
=
W
+
´
OUT1
OUT1
IN1(min)
RIPPLE(cap)
IN(min)
SW
I
V
10 A 1.2 V
C
15 F
V
V
f
200mV 8 V 500kHz
´
´
=
=
=
m
´
´
´
´
TPS40322
www.ti.com
SLUSAF8D – JUNE 2011 – REVISED JANUARY 2014
A 744314110 from Wurth-Midcom with 1.1-µH zero current inductance is selected. Inductance for this part is
0.88-µH at 10 A bias. This 15-A, 3.15 m
Ω inductor exceeds the minimum inductor ratings in a 7 mm x 7 mm
package.
Input Capacitor Selection (C3 through C6)
The input voltage ripple is divided between the capacitance and ESR of the input capacitor. For this design
VRIPPLE(cap) = 200 mV and VRIPPLE(esr) = 50 mV. The minimum capacitance and maximum ESR are estimated
using Equation 16.
(16)
(17)
The RMS current in the input capacitors is estimated using Equation 18.
(18)
(19)
To achieve these goals, two 0805, 10-µF capacitors, one 0605, 1.0-µF capacitor and one 0402, 0.1-µF X5R
ceramic capacitor are combined at the input.
MOSFET Selection (Q1)
Texas Instruments CSD86330, 20-A power block device was chosen. This device incorporates the high-side and
low-side MOSFETs in a single 3 mm x 3 mm package. The high-side MOSFET has an on-resistance (RDS(on)) of
8.8 m
Ω, while the low-side on-resistance (RDS(on)) is 4.6 mΩ, both at 4.5 V gate voltage. A 5.11-Ω gate resistor is
used on the HDRV pin on each device for added noise immunity.
ILIM Resistor (R2)
The output current is sensed across the DCR of the L1 output inductor. An RC combination having a time
constant equal to that of the L1 inductance and the DCR is used to extract the current information as a voltage. A
standard capacitor value of 0.1-µF is used. The resistor, R13, can be calculated using Equation 20.
(20)
A standard 3.09-k
Ω resistor was selected.
This design limits the maximum voltage drop across the current sense inputs, VCS(max), to 50 mV. If the voltage
drop across the DCR of the inductor is greater than VCS(max), after allowing for 30% overshoot spikes and a 20%
variation in the DCR value, then a resistor is added to divide the voltage down to 50 mV. The divider resistor,
R15, is calculated by Equation 21.
where
(22)
(22)
The maximum DCR voltage drop is given by Equation 23.
(23)
Copyright © 2011–2014, Texas Instruments Incorporated
Submit Documentation Feedback
23


Similar Part No. - TPS40322_15

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
TPS40322 TI1-TPS40322_16 Datasheet
1Mb / 47P
[Old version datasheet]   Dual Output or Two-Phase Synchronous Buck Controller
More results

Similar Description - TPS40322_15

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
TPS40322 TI1-TPS40322_16 Datasheet
1Mb / 47P
[Old version datasheet]   Dual Output or Two-Phase Synchronous Buck Controller
TPS40322 TI1-TPS40322 Datasheet
1,023Kb / 40P
[Old version datasheet]   Dual Output or Two-Phase Synchronous Buck Controller
TPS40422 TI1-TPS40422 Datasheet
965Kb / 54P
[Old version datasheet]   Dual-Output or Two-Phase Synchronous Buck Controller with PMBus
TPS40422 TI1-TPS40422_16 Datasheet
2Mb / 71P
[Old version datasheet]   Dual-Output or Two-Phase Synchronous Buck Controller with PMBus Interface
TPS5120-Q1 TI1-TPS5120-Q1 Datasheet
325Kb / 21P
[Old version datasheet]   DUAL OUTPUT, TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
TPS5120 TI1-TPS5120_16 Datasheet
840Kb / 23P
[Old version datasheet]   DUAL OUTPUT, TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
TPS5120 TI-TPS5120_15 Datasheet
858Kb / 24P
[Old version datasheet]   DUAL OUTPUT,TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
TPS5120-EP TI1-TPS5120-EP Datasheet
483Kb / 23P
[Old version datasheet]   DUAL OUTPUT, TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
TPS5120 TI-TPS5120 Datasheet
291Kb / 20P
[Old version datasheet]   DUAL OUTPUT, TWO PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER
Semtech Corporation
Semtech Corporation
SC2443 SEMTECH-SC2443 Datasheet
1Mb / 20P
   Dual-Phase Single or Two Output Synchronous Step-Down Controller
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  35  36  37  38  39  40  41  42 


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