1nF

100µF

100nF

GND

GND

GND

IN

PVCC

1nF

1nF

GND

FB

FB

1nF

100µF

100nF

GND

TPA3136D2

13

14

1

2

3

4

5

6

7

8

9

10

11

12

OUTPL

PVCC

OUTNR

OUTPR

GND

PVCC

BSPR

PVCC

PVCC

OUTNL

BSNL

BSPL

GND

BSNR

LINP

/FAULT

PBTL

RINP

RINN

PLIMIT

NC

NC

AVCC

LINN

/SD

GVDD

GND

NC

27

28

25

26

23

24

21

22

19

20

17

18

15

16

470nF

470nF

/SHUTDOWN

1µF

10R

PVCC

56k

39k

GND

10k

1µF

GND

GND

1µF

1µF

Copyright © 2017, Texas Instruments Incorporated

17

TPA3136D2, TPA3136AD2

www.ti.com

SLOS938D – MAY 2016 – REVISED MARCH 2017

Product Folder Links: TPA3136D2 TPA3136AD2

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Copyright © 2016–2017, Texas Instruments Incorporated

Typical Applications (continued)

Figure 19. Stereo Class-D Amplifier with PBTL Output and Single-Ended Input with Spread Spectrum

Modulation

10.2.1 Design Requirements

10.2.1.1 PCB Material Recommendation

FR-4 Glass Epoxy material with 1 oz. (35 µm) is recommended for use with the TPA3136D2/TPA3136AD2. The

use of this material can provide for higher power output, improved thermal performance, and better EMI margin

(due to lower PCB trace inductance). It is recommended to use several GND underneath the device thermal pad

for thermal coupling to a bottom side copper GND plane for best thermal performance.

10.2.1.2 PVCC Capacitor Recommendation

The large capacitors used in conjunction with each full-bridge, are referred to as the PVCC Capacitors. These

capacitors should be selected for proper voltage margin and adequate capacitance to support the power

requirements. In practice, with a well designed system power supply, 100 μF, 16 V will support most applications

with 12-V power supply. 25-V capacitor rating is recommended for power supply voltage higher than 12 V. For

The PVCC capacitors should be low ESR type because they are used in a circuit associated with high-speed

switching.

10.2.1.3 Decoupling Capacitor Recommendations

In order to design an amplifier that has robust performance, passes regulatory requirements, and exhibits good

audio performance, good quality decoupling capacitors should be used. In practice, X7R should be used in this

application.

The voltage of the decoupling capacitors should be selected in accordance with good design practices.

Temperature, ripple current, and voltage overshoot must be considered. This fact is particularly true in the

selection of the ceramic capacitors that are placed on the power supply to each full-bridge. They must withstand

the voltage overshoot of the PWM switching, the heat generated by the amplifier during high power output, and

the ripple current created by high power output. A minimum voltage rating of 16 V is required for use with a 12-V

power supply.