ST EVAL-7803APSO-SA Manuale utente

Introduction

Scope of this document is to describe the EVAL-7803APSO-SA standalone demo module.

It contains the module description, the schematic, the bill of materials and the board layout of the following modules:

6038-469.18 v1.0

In the following chapters it will be referred as 469 module.

Evaluation board for TDA7803A and TDA7808 power amplifiers in PSO package

UM2758

User manual

UM2758 - Rev 1 - August 2020

For further information contact your local STMicroelectronics sales office.

www.st.com

1Hardware description

1.1 Board description

This board is based for TDA7803A and TDA7808 in PSO36 package. It is designed to provide 4 x 27 W on 4 Ω

load.

Figure 1. EVAL-7803APSO-SA board Top view

UM2758

Hardware description

UM2758 - Rev 1 page 2/13

Figure 2. EVAL-7803APSO-SA board Bottom view

Note: • Demo board are designed with scope to show typical device performance in standard application.

Furthermore, some components mounted on PCB could result downsized for satisfy a full performance

operation. Adequate heat dissipation must be provided for optimal performance: heatsink provided with

demo board ensures optimal dissipation when device is supplied with 14 V supply and a 4 Ω load is

connected to its outputs. For further information about high power measurements please contact ST

application team.

• The Figure 2 is taken without heatsink which is listed in the BOM reported in the Table 1.

UM2758

Board description

UM2758 - Rev 1 page 3/13

1.2 Connector and connections

Power supply

The power supply, ranging from 4.5 V to 18.5 V, can be connected on J4 screw terminal following the labels.

Outputs

The amplifier outputs are present on J1, J2, J3, J8 screw terminal. The output assigned to each connection is

written nearby the connector

Input control signal

On J5 terminal is possible to find the I2C and I2S inputs. Additional control/monitor signals are available on this

connector: please refer to Section 1.3 Board option.

Board cascading

To test multiple device systems, is possible to connect more than one 469 modules together by means of J6 and

J7. Plugging J6 of one board to J7 of another, the I2C and I2S bus will be shared allowing to control the system by

means of one I2C interface and feed the same audio.

In order to command each device independently from each other, different addresses must be used on each 469

board. The number of 469 modules is limited by the maximum number of address that can be set.

1.3 Board option

Address selection

Proper I2C address for 469 module could be set by shorting with a 0 Ω resistor (or tin drop) one resistor from J9 to

J12. Please refer to TDA7901 datasheet for list of available addresses.

3.3 V voltage reference

On board 3.3 V reference (made by R1 and D1) is used for pull-up resistor of digital lines. When accurate current

measurement is needed (i.e. efficiency measurements) voltage reference should be disabled: in this case an

external 3.3v reference must be provided for 3V3 line.

STBY function

Stand by function can be hardware controlled by jumper P1 (3V3 →Device ON or GND → Device standby).

UNMUTE

Hardware unmute function is controlled by P3 (GND → device mute). By default these jumpers are left open

(device internal pull-up). P3 jumper allows also to remote control UNMUTE function through J10 connector (PIN

31, MUTE).

CD/DIAG

CD/DIAG function can be monitored through J10 connector, pin 19.

I2S data line pairing

If only one I2S data line is needed, SDA1 and SDA2 could be shorted through R9 with a 0 Ω (or tin drop).

1.4 Parallelized channels

TDA7803 provides the possibility to parallelize the channels to increase the output current capability. During this

operation one of the two channels in the parallel configuration will become the “Master” channel, the other one will

be the “Slave” channel.

The possible configurations are:

• CH1 and CH2 in parallel: CH1 is the master, CH2 is the slave

• CH3 and CH4 in parallel: CH3 is the master, CH4 is the slave

To use parallel configuration connect the two channels outputs close to the load, respecting output polarities.

Important:

When channels are parallelized, pay attention to the device’s configuration. Play signal with parallelized channels when the

device is configured for single output channels can lead to improper functioning

UM2758

Connector and connections

UM2758 - Rev 1 page 4/13

1.5 Board schematic

Figure 3. EVAL-7803APSO-SA board schematic

P&P Fiducial

HS1

SK1 SK2

BUSES EXP CONNECT ORS

SCL

SDA

SCK

SDA2

SDA1

SCK

SDA1

SDA2

SCL

SDA

3V3

STD DONGLE CONNECT OR

TP3

TP2

SCL

SDA

SCK

SDA2

SDA1

DGND

SDA2SDA1

DGND

CD/DIAG TP4

DGND

SCK

SDA1

SDA2

SCL

SDA

MUTE

OUT4-

OUT4+

OUT1-

OUT1+

OUT2+

OUT2-

OUT3+

OUT3-

OUTPUT CONNECT ORS

OUT1+

OUT1-

OUT2+

OUT2-

OUT3-

OUT3+

OUT4-

OUT4+

TAB 1

OUT4- 2

VCC34 3

PWGND4 4

OUT4+ 5

NC 6

CD/DIAG 7

SDA 8

SCL 9

ADD 10

STDBY 11

WS 12

UNM UTEhw 13

OUT2+ 14

PWGND2 15

VCC12 16

OUT2- 17

TAB 18

TAB

OUT1-

VCC12

PWGND1

OUT1+

SCK

SD24

SD13

DGND

AGND

D3V3

A3V3

OUT3+

PWGND3+

VCC34

OUT3-

TAB

TDA

7803

TDA7803

GND GND

VCC34 VCC34

VCC12 VCC12

SCK

SDA

SCL

OUT2+

OUT2-

GND

OUT1-

OUT1+

GND

OUT3+

OUT3-

GND

SDA2

SDA1

CD/DIAG

OUT4-

OUT4+

DGND

3V3

122

344

2x2 p2.54mm M

122

344

2x2 p2.54mm M

DGND

GND

ADD

MUTE

ADDR2 ADDR1 RES

0 0 R6

0 1 R5

1 0 R4

1 1 R3

R3 91K

R4 56K

R6 10K

R5 36K

J9 0R NM

J10 0R NM

J11 0R NM

J12 0R NM

DGND

ADD

100nF

VCC12Vbatt

+C1

2200uF

R1 1K

100nF

VCC12

100nF

VCC34

100nF

VCC34

GND

3V3

GND AGND DGND

TP1

ADDRESS SELECTION NETWORK

MMSZ5228BT1G

Jumpe r

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

8x2 p2.54mm M Horiz.

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

8x2 p2.54mm F Horiz.

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

20x2 p2.54mm M Horiz.

C1 1

4.7nF NM

C12

4.7nF NM

C31

4.7nF NM

C32

4.7nF NM

C41

4.7nF NM

C42

4.7nF NM

C22

4.7nF NM

C21

4.7nF NM

22uF

4.7uF

R1 1 0R

C10

1uF

R2 47K

R9 0R NM

R8 4K7 NM

R7 4K7 NM

R10 47K

100pF

POWER STAGE

220nF

UM2758

Board schematic

UM2758 - Rev 1 page 5/13

1.6 Bill of materials

Table 1. Bill of materials

Quantity Designator Description Value Rated V Package

1 C1 SMD Electrolityc Capacitor 2200 uF 25 V 19x19 d18 mm

1 C2 SMD MLCC X7R Capacitor 220 nF 25 V 0603

4 C3, C4, C5, C6 SMD MLCC X7R Capacitor 100 nF 25 V 0603

1 C7 SMD MLCC X7R Capacitor 22 uF 6.3 V 1206

1 C8 SMD MLCC X7R Capacitor 4.7 μF 10 V 0805

1 C9 SMD MLCC X7R Capacitor 100 pF 16 V 0603

1 C10 SMD MLCC X7R Capacitor 1 μF 25 V 0805

8C11, C12, C21, C22, C31,

C32, C41, C42 SMD MLCC X7R Capacitor 4 n7 25 V 0603

1 D1 3.9V Zener DIODE - 3.9 V SOD-123

1 HS1 HEATSINK - - -

5 J1, J2, J3, J4, J8 Terminal Block 2position p5.08mm - - p5.08 mm

1 J5 Header, 40-Pin, Dual row, TH, Right Angle, Male - - p2.54 mm

1 J6 Header, 8-Pin, Dual row, TH, Right Angle, Male - - p2.54 mm

1 J7 Header, 8-Pin, Dual row, TH, Right Angle, Female - - p2.54 mm

4 J9, J10, J11, J12 Solder Jumper 0805 - - 0805

2 P1, P3 Header, 2-Pin, Dual row, TH, Straight, Male - - p2.54 mm

2 P2, P4 Jumper shunt p2.54mm - - p2.54 mm

1 R1 Surface mount chip resistor 1 KΩ 75 V 0603

1 R2 Surface mount chip resistor 47 KΩ 75 V 0603

1 R3 Surface mount chip resistor 91 KΩ 75 V 0603

1 R4 Surface mount chip resistor 56 KΩ 75 V 0603

1 R5 Surface mount chip resistor 36 KΩ 75 V 0603

1 R6 Surface mount chip resistor 10 KΩ 75 V 0603

2 R7, R8 Surface mount chip resistor 4.7 KΩ 75 V 0603

1 R9 Surface mount chip resistor 0 Ω 75 V 0603

1 R10 Surface mount chip resistor 47 KΩ 75 V 0603

1 R11 Surface mount chip resistor 0 Ω 200 V 1206

2 SK1, SK2 M3 Fastener - - -

1 U1 4 Channel Class AB Amplifier - - PSO36

UM2758

Bill of materials

UM2758 - Rev 1 page 6/13

1.7 Board layout

Figure 4. Assembly top

Figure 5. Inner 1

UM2758

Board layout

UM2758 - Rev 1 page 7/13

Figure 6. inner 2

Figure 7. Assembly bottom

UM2758

Board layout

UM2758 - Rev 1 page 8/13

2Information on board use

This evaluation board/kit is intended to be used for ENGINEERING DEVELOPMENT, DEMONSTRATION OR

EVALUATION PURPOSES ONLY and it is not considered by ST Microelectronics (ST) a finished end product fit

for general consumer use. People handling the product(s) must have electronics training and observe good

engineering practice standards. As such, the goods being provided are not intended to be complete in terms of

required design-, marketing- and/or manufacturing-related protective considerations, including product safety and

environmental measures typically found in end products that incorporate such semiconductor components or

circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding

electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore

they may not meet the technical requirements of these directives or other related directives.

UM2758

Information on board use

UM2758 - Rev 1 page 9/13

Revision history

Table 2. Document revision history

Date Version Changes

05-Aug-2020 1 Initial release.

UM2758

UM2758 - Rev 1 page 10/13

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