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TPA3251D2
SLASE40C – JUNE 2015 – REVISED JUNE 2015
TPA3251D2 175-W Stereo, 350-W Mono PurePath™ Ultra-HD Analog-Input
Class-D Amplifier
1 Features
2 Applications
•
•
•
•
•
•
•
•
1
•
•
•
•
•
•
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Differential Analog Inputs
Total Output Power at 10%THD+N
– 175-W Stereo into 4 Ω in BTL Configuration
– 220-W Stereo into 3 Ω in BTL Configuration
– 350-W Mono into 2 Ω in PBTL Configuration
Total Output Power at 1%THD+N
– 140-W Stereo into 4 Ω in BTL Configuration
– 175-W Stereo into 3 Ω in BTL Configuration
– 285-W Mono into 2 Ω in PBTL Configuration
Advanced Integrated Feedback Design with Highspeed Gate Driver Error Correction
(PurePath™ Ultra-HD)
– Signal Bandwidth up to 100 kHz for High
Frequency Content From HD Sources
– Ultra Low 0.005% THD+N at 1 W into 4 Ω and
400ms
/RESET
AVDD
tAVDD ramp C 100µs
/FAULT
tPrecharge C 220ms
VIN_X
OUT_X
VOUT_X
tStartup ramp
Figure 28. Startup Timing
28
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SLASE40C – JUNE 2015 – REVISED JUNE 2015
Powering Up (continued)
When RESET is released to turn on TPA3251D2, FAULT signal will turn low and AVDD voltage regulator will be
enabled. FAULT will stay low until AVDD reaches the undervoltage protection (UVP) voltage threshold (see the
Electrical Characteristics table of this data sheet). After a precharge time to stabilize the DC voltage across the
input AC coupling capacitors, before the ramp up sequence starts.
11.3 Powering Down
The TPA3251D2 does not require a power-down sequence. The device remains fully operational as long as the
gate-drive supply (GVDD_X) voltage and VDD voltage are above the undervoltage protection (UVP) voltage
threshold (see the Electrical Characteristics table of this data sheet). Although not specifically required, it is a
good practice to hold RESET low during power down, thus preventing audible artifacts including pops or clicks by
initiating a controlled ramp down sequence of the output voltage.
12 Layout
12.1 Layout Guidelines
•
•
•
•
•
•
•
•
•
Use an unbroken ground plane to have good low impedance and inductance return path to the power supply
for power and audio signals.
Maintain a contiguous ground plane from the ground pins to the PCB area surrounding the device for as
many of the ground pins as possible, since the ground pins are the best conductors of heat in the package.
PCB layout, audio performance and EMI are linked closely together.
Routing the audio input should be kept short and together with the accompanied audio source ground.
The small bypass capacitors on the PVDD lines of the DUT be placed as close the PVDD pins as possible.
A local ground area underneath the device is important to keep solid to minimize ground bounce.
Orient the passive component so that the narrow end of the passive component is facing the TPA3251D2
device, unless the area between two pads of a passive component is large enough to allow copper to flow in
between the two pads.
Avoid placing other heat producing components or structures near the TPA3251D2 device.
Avoid cutting off the flow of heat from the TPA3251D2 device to the surrounding ground areas with traces or
via strings, especially on output side of device.
Netlist for this printed circuit board is generated from the schematic in Figure 29.
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TPA3251D2
SLASE40C – JUNE 2015 – REVISED JUNE 2015
www.ti.com
12.2 Layout Examples
12.2.1 BTL Application Printed Circuit Board Layout Example
T3
22k
10k
T1
1
44
2
43
3
42
4
41
5
40
6
39
7
38
8
37
9
36
10
35
11
34
12
33
13
32
14
31
15
30
16
29
17
28
18
27
19
26
20
25
21
24
22
23
T2
T2
T1
T3
System Processor
Bottom Layer Signal Traces
Bottom to top layer connection via
Pad to top layer ground pour
Top Layer Signal Traces
A.
Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer
copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B.
Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat
sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without
going through vias. No vias or traces should be blocking the current path.
C.
Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and
close to the pins.
D.
Note T3: Heat sink needs to have a good connection to PCB ground.
Figure 29. BTL Application Printed Circuit Board - Composite
30
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SLASE40C – JUNE 2015 – REVISED JUNE 2015
Layout Examples (continued)
12.2.2 SE Application Printed Circuit Board Layout Example
T3
22k
10k
T1
1
44
2
43
3
42
4
41
5
40
6
39
7
38
8
37
9
36
10
35
11
34
12
33
13
32
14
31
15
30
16
29
17
28
18
27
19
26
T2
T2
20
25
21
24
22
23
T1
T3
System Processor
Bottom Layer Signal Traces
Bottom to top layer connection via
Pad to top layer ground pour
Top Layer Signal Traces
A.
Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer
copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B.
Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat
sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without
going through vias. No vias or traces should be blocking the current path.
C.
Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and
close to the pins.
D.
Note T3: Heat sink needs to have a good connection to PCB ground.
Figure 30. SE Application Printed Circuit Board - Composite
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SLASE40C – JUNE 2015 – REVISED JUNE 2015
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Layout Examples (continued)
12.2.3 PBTL Application Printed Circuit Board Layout Example
T3
22k
10k
T1
Grounded for PBTL
Grounded for PBTL
1
44
2
43
3
42
4
41
5
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6
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9
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32
14
31
15
30
16
29
17
28
18
27
19
26
20
25
21
24
22
23
T2
T2
T1
T3
System Processor
Bottom Layer Signal Traces
Bottom to top layer connection via
Pad to top layer ground pour
Top Layer Signal Traces
A.
Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer
copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B.
Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat
sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without
going through vias. No vias or traces should be blocking the current path.
C.
Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and
close to the pins.
D.
ote T3: Heat sink needs to have a good connection to PCB ground.
Figure 31. PBTL Application Printed Circuit Board - Composite
32
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TPA3251D2
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SLASE40C – JUNE 2015 – REVISED JUNE 2015
13 Device and Documentation Support
13.1 Documentation Support
TPA3251D2EVM User's Guide, SLVUAG8
13.2 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
13.3 Trademarks
PurePath, E2E are trademarks of Texas Instruments.
Blu-ray Disk is a trademark of Blu-ray Disc Association.
All other trademarks are the property of their respective owners.
13.4 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
13.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
14 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OPTION ADDENDUM
www.ti.com
3-Jul-2015
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
TPA3251D2DDV
ACTIVE
HTSSOP
DDV
44
35
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
0 to 70
3251
TPA3251D2DDVR
ACTIVE
HTSSOP
DDV
44
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-3-260C-168 HR
0 to 70
3251
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
3-Jul-2015
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
10-Sep-2015
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
TPA3251D2DDVR
Package Package Pins
Type Drawing
SPQ
HTSSOP
2000
DDV
44
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
330.0
24.4
Pack Materials-Page 1
8.6
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
15.6
1.8
12.0
24.0
Q1
PACKAGE MATERIALS INFORMATION
www.ti.com
10-Sep-2015
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
TPA3251D2DDVR
HTSSOP
DDV
44
2000
367.0
367.0
45.0
Pack Materials-Page 2
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