Evaluation boards for FDA803D and FDA903D power amplifiers - … · The people who handle the product(s) must have electronics training and observe good engineering standard practices

IntroductionThis document describes how to use the evaluation board in order to check FDA803D and FDA903D devices’ performance; forany other information and deeper details please refer to the FDA803D and FDA903D datasheets.

Evaluation boards for FDA803D and FDA903D power amplifiers

UM2447

User manual

UM2447 - Rev 1 - March 2019For further information contact your local STMicroelectronics sales office.

www.st.com

http://www.st.com

1 Purpose

The purpose of this document is to describe the FDA803D (and FDA903D) Stand Alone Demo Module for SlugDown package.

Table 1. Board summary

Order Code Device supported

EVAL-FDA803D-SA FDA803D

EVAL-FDA903D-SA FDA903D

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

6038-443.16In the following chapters it will be referred as 443 module.

UM2447Purpose

UM2447 - Rev 1 page 2/12

2 Warning

This evaluation board/kit is intended for the following uses:• Engineering development• Demonstrations• Evaluation purposes only

and is not considered by ST Microelectronics (ST) to be a finished end-product fit for general consumer use.The people who handle the product(s) must have electronics training and observe good engineering standardpractices.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 measurestypically found in end products that incorporate such semiconductor components or circuit boards.This evaluation board/kit does not fall within the purpose of the European Union directives regardingelectromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and thereforemay not meet the technical requirements of these directives or other related directives.

UM2447Warning

UM2447 - Rev 1 page 3/12

3 Module description

This board is a 1x45W class D amplifier based on the ST FDA803D (or FDA903D) and is intended to demonstratethe device’s capabilities.

Figure 1. 6038-443.16 - top view

Figure 2. 6038-443.16 with Coilcraft XAL4040 - bottom view

Note: The output LC filter in this module can be assembled with different values and kind of coils and capacitors. Bydefault it is assembled for a 14.4V application with ferrite coils that are a good compromise consideringperformances, price and availability that allow to drive 4 ohm.

3.1 HW Configuration and Control SW

3.1.1 Connectors and connectionsThe 443 module embeds a Stand Alone connection which is different from the previous power amplifiers boardsdeveloped.Based on that:

UM2447Module description

UM2447 - Rev 1 page 4/12

• The Voltage Supply to the power amplifier can be provided through J3 connector (Vbat 3.3–18V, GND) withthe chance to use the sense technique close to the device through the VCC/GND test points;

• The Feedback default configuration including the output L-C low-pass filter, allowing superior frequencyresponse linearity and lower distortion. Furthermore, there is also the chance to use the FDA803D (orFDA903D) as traditional class D amplifiers with the feedback directly connected to the PWM output (beforeL-C filter stage). Both working modes can be selected mounting or not the following resistors:

Table 2. Working mode selection

R5, R6 R7, R8

Traditional feedback 0 Ω DO NOT MOUNT

Feedback after the demodulation filter DO NOT MOUNT 0 Ω

• The Device State and Address Selection of the power amplifier can be set through the ENABLE pins ENx( x = 1, 2, 3, 4) on J10 connector. With an open connection the ENx is set to high logical value and through ajumper it is possible to pull down (to GND) the ENx desired thus setting the low logical value. In this way it ispossible to select different I2C addresses (up to 8) or to configure the device in 4 different legacy modesaccording to the Data Sheet table;

• The HW Mute of the power amplifier can be set through the MUTE pin on J10 connector. With an openconnection the MUTE pin is set to high value (the amplifier is in play state) and through a jumper it ispossible to pull down (to GND) the MUTE pin thus setting the low value and put in mute state the amplifier;

• The Output Channel of the power amplifier can be monitored/analyzed through the J1 connector (CH+/CH-);

3.1.2 How to manage the I2C

3.1.2.1 I2C HW & SW control

For the programmability of a “Stand Alone module” in terms of I2C settings, there is the J10 connector on 424stand alone module (I2C SCL, I2C SDA, GND).GUI is available and it is running on a Windows PC if the user adopts ST interface board (description available inthe dedicated user manual)For the GUI description, please refer to its own manuals.There are other possibilities to control the device in terms of I2C settings (e.g. FTDI, etc) but the SW controlneeds to be implemented by the final user.

3.1.2.2 I2S HW & SW controlThe I2S signals (I2S SCL, I2S WS, I2S SDA1) of 424 “Stand Alone module” can be provided through the J10connector with different HW configurations:1. Directly from Audio Precision instruments:

a. PSIA controller (AP 2700 series)b. Digital Serial Transmitter (APx5xx series)

2. ST interface board (description available in the dedicated user manual)

UM2447HW Configuration and Control SW

UM2447 - Rev 1 page 5/12

4 Schematic, BOM and layouts

4.1 Schematic

Figure 3. Schematic

C191uF

C18100nF

VCC1VCC

TP2

C251uF

C24100nF

C2033nF

C2133pF

EN4

R9

1K

R10

Mur

ata

PRG

18BB

470M

B1RB

D1MMSZ4684T1

I2S_SDA1

I2C_SCL

I2S_SCL

I2S_WS

I2S_TEST

CD/DIAG

I2C_SDA

DVdd

EN3

EN2

EN1

AVdd

VCC2

VCC1

C174.7uF

C15100pF

DGSVR

D1V8SVR

MUTEC75nF

C8

4.7uF

C10

100pF

SVR

A5VSVR

AGSVR

R410

C6

3.3uF 50V

C2330p

C41uF

R2 10

10uHL2

XAL5050-103MEOUT1- CH1-

R8 0R

R6 0R NMFB1-

R310

C53.3uF 50V

C1330p

C31uF

R1 10

10uHL1

XAL5050-103ME

OUT1+CH1+

R7 0R

R5 0R NM FB1+

TAB 1

GNDM 2

VCCM 3

OUTM 4

OUTM 5

FBM 6

NC 7

DGND 8

DVDD 9

ENABLE 1 10

ENABLE 2 11

ENABLE 3 12

ENABLE 4 13

THSENS 14

CDDIAG 15

NC 16

D1V8SVR 17

DGSVR 18I2CDATA19I2CCLK20I2STEST21I2SDATA22I2SCLK23I2SWS24AGND25AVDD26

AGSVR28

A5VSVR27

SVR29HWMUTE30FBP31OUTP32OUTP33NC34

GNDP36

VCCP35

U1

FDA803

TP4

THS

2

1

J3

EN1

EN2

EN3

R 13

10K

R11

10K

C27

100pF

R15

10K

R12

10K

3V3

R 14

10K

STD DONGLE CONNECTOR

CH1+

CH1-2

1

J1

EN4

C28470uF 50V

POWER STAGE

S 2S 3

G4

D5D6D7D8

S 1

Q1 STS10P4LLF6

R1722K

R1622K

C261uF

L3

4.7uH

D3SM6T36CAY

C234.7uF

C224.7uF

C9

10nF

C1610nF

C11

100pF

C12

10nF

C14

100pF

C13

10nF

VCC2

3V3TP3

GNDTP1

I2S_SCL

I2S_WS

I2S_SDA1

I2S_SDA2

2

4

6

8

10

1

3

5

7

9

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

J10

20x2 p2.54mm M Horiz.

CD/DIAG

I2C_SCL

Vbatt

I2C_SDA

Vbatt

AVdd

BLM3

BLM18BA220SN1

BLM2

BLM18BD102SN1

DVdd

I2S_TEST

D2MMBZ5244B

MUTE

Vbatt

GNDTP4

P1 P2 P3 P4 P5

GADG1707181240PS

(exposed pad)PowerSSO-36

SLUG DOWN

Jumper Jumper Jumper Jumper Jumper

SPEAKERS CONNECTOR

4.2 Bill of materials

Table 3. Bill of materials

Comment Description Designator Package Voltage rate Quantity

0R Surface mount chip resistor R7, R8 0603 2

0R NM Surface mount chip resistor R5, R6 0603 2

20x2 p2.54mm M Horiz. Header Male, Dual row, SMD,Horiz. J10 1

4.7 µH Inductor L3 1

BLM18BA220SN1 Inductor BLM3 0603 1

BLM18BD102SN1 Inductor BLM2 0603 1

UM2447Schematic, BOM and layouts

UM2447 - Rev 1 page 6/12

Comment Description Designator Package Voltage rate Quantity

FDA803 Fully digital class D amplifier1ch U1 PSSOP36 1

Jumper Top Jumper Socket WithHandle red gold p127 P1, P2, P3, P4, P5 5

MC000034 Terminal Block 2positionp5.08mm J1, J3 2

MMBZ5244B 3.3V Zener Diode D2 1

MMSZ4684T1 3.3V Zener Diode D1 1

Murata PRG18BB470MB1RB Surface mount chip resistor R10 0603 1

SM6T36AY Transil D3 1

STS10P4LLF6 Q1 1

1K Surface mount chip resistor R9 0805 1

1µF MLCC X7R Capacitor C3, C4, C19, C25, C26 0805 50 V 5

3.3 µF 50V MLCC X7R Capacitor C5, C6 1210 50 V 2

4.7 µF MLCC X7R Capacitor C22, C23 2020 100 V 2

4.7 µF MLCC X7R Capacitor C8, C17 0805 25 V 2

5 nF MLCC X7R Capacitor C7 0603 50 V 1

10 Surface mount chip resistor R1, R2, R3, R4 1210 4

10 kΩ Surface mount chip resistor R11, R12, R13, R14,R15 0603 5

10 nF MLCC X7R Capacitor C9, C12, C13, C16 0603 25 V 4

XAL5050-103ME Inductor L1, L2 2

22 kΩ Surface mount chip resistor R16, R17 0603 2

33 nF MLCC X7R Capacitor C20 0603 50 V 1

33 pF MLCC X7R Capacitor C21 0603 50 V 1

100 nF MLCC X7R Capacitor C18, C24 0603 50 V 2

100 pF MLCC X7R Capacitor C10, C11, C14, C15 0603 50 V 4

100 pF MLCC X7R Capacitor C27 0603 50 V 1

330 pF MLCC X7R Capacitor C1, C2 0603 50 V 2

470 µF 50 V Alluminium Polarized CapacitorSMD C28 50 V 1

UM2447Bill of materials

UM2447 - Rev 1 page 7/12

4.3 PCB layoutsAll the useful circuitry/components for the FDA803/903, in terms of PCB space occupation, is highlighted by theblack rectangle while outside there are the power supply stage and connectors (Vbat, Out, Signal Controls I2C,I2S, Enables, Mute, CDDIAG).

Figure 4. 6038-443.16 - FDA803 (903) – Top layer and silkscreen

Figure 5. 6038-443.16 - FDA803D (903D) – Inner1 layer

Note: It is possible that some boards are produced with different marking: 6038-424.15 - FDA803 SD SA – 1.2 –101016. No differences respect to the one marked 6038-443.16 - FDA803D (903D) SD SA.

UM2447PCB layouts

UM2447 - Rev 1 page 8/12

Figure 6. 6038-443.16 - FDA803D (903D) – Inner2 layer

Figure 7. 6038-443.16 - FDA803D (903D) – Bottom layer and silkscreen

UM2447PCB layouts

UM2447 - Rev 1 page 9/12

Revision history

Table 4. Document revision history

Date Version Changes

20-Mar-2019 1 Initial release.

UM2447

UM2447 - Rev 1 page 10/12

Contents

1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3 Module description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3.1 HW Configuration and Control SW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1.1 Connectors and connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1.2 How to manage the I2C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Schematic, BOM and layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

4.1 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.2 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.3 PCB layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

UM2447Contents

UM2447 - Rev 1 page 11/12

IMPORTANT NOTICE – PLEASE READ CAREFULLY

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to STproducts and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. STproducts are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design ofPurchasers’ products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or servicenames are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2019 STMicroelectronics – All rights reserved

UM2447

UM2447 - Rev 1 page 12/12

http://www.st.com/trademarks

1 Purpose2 Warning3 Module description3.1 HW Configuration and Control SW3.1.1 Connectors and connections3.1.2 How to manage the I2C3.1.2.1 I2C HW & SW control3.1.2.2 I2S HW & SW control

4 Schematic, BOM and layouts4.1 Schematic4.2 Bill of materials4.3 PCB layouts

Revision history

Documents

Evaluation boards for FDA803D and FDA903D power amplifiers - … · The people who handle the product(s) must have electronics training and observe good engineering standard practices