Philips TDA8928J User's Manual
Contents
1. Power stage 2 x 10 or 1 x 20 W class D audio amplifier 6 BLOCK DIAGRAM Preliminary specification TDA8928J EN1 SW1 REL1 STAB DIAG POWERUP EN2 Sw2 REL2 Vpp2 VDD1 TDA8928J BOOT1 TEMPERATURE SENSOR AND CURRENT PROTECTION DRIVER LOW Vss1 Fig 1 Block diagram Vss2 OUT1 BOOT2 OUT2 MGX377 2004 May 05 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D TDA8928J audio amplifier 7 PINNING SYMBOL DESCRIPTION SW1 digital switch input channel 1 digital control output channel 1 m SW1 digital open drain output for overtemperature and overcurrent REL1 report DIAG digital enable input channel 1 ERR positive power supply channel 1 VDD1 bootstrap capacitor channel 1 PWM output channel 1 negative power supply channel 1 our BOOT1 decoupling internal stabilizer for Vss1 logic supply STAB TDA8928J negative power supply channel 2 PWM output channel 2 bootstrap capacitor channel 2 Vss2 OUT2 positive power supply channel 2 BOOTS EN2 digital enable input channel 2 Vpp2 POWERUP enable input for switching on EN2 internal reference sources POWERUP digital control output channel 2 REL2 digital switch input channel 2 Sw2 MGX378 Fig 2 Pin configuration 2004 May 05 5 Philips Semiconductors Power stage 22. SOT243 3 t 03 03 12 ISSUE DATE 2004 May 05 19 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D i TDA8928J audio amplifier RDBS17P plastic rectangular DIL bent SIL power package 17 leads row spacing 2 54 mm SOT577 2 non concave view B mounting base side I A2 DIMENSIONS mm are the original dimensions UNIT A A bj c DD d 4 6 24 0 mm 195 ge 23 6 Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included OUTLINE REFERENCES EUROPEAN VERSION JEDEC JEITA PROJECTION que e 03 03 12 ISSUE DATE 2004 May 05 20 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D y TDA8928J audio amplifier 17 SOLDERING The total contact time of successive solder waves must not 17 1 Introduction to soldering through hole mount e sss s packages The device may be mounted up to the seating plane but the temperature of the plastic body must not exceed the specified maximum storage temperature Tstg max If the printed circuit board has been pre heated forced cooling may be necessary imme
3. packages hot bar soldering or manual soldering is suitable 2004 May 05 21 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D y TDA8928J audio amplifier 18 DATA SHEET STATUS DATA SHEET STATUS Objective data PRODUCT STATUS 2 3 Development DEFINITION This data sheet contains data from the objective specification for product development Philips Semiconductors reserves the right to change the specification in any manner without notice Preliminary data Qualification This data sheet contains data from the preliminary specification Supplementary data will be published at a later date Philips Semiconductors reserves the right to change the specification without notice in order to improve the design and supply the best possible product This data sheet contains data from the product specification Philips Semiconductors reserves the right to make changes at any time in order to improve the design manufacturing and supply Relevant changes will be communicated via a Customer Product Process Change Notification Product data Production CPCN Notes 1 Please consult the most recently issued data sheet before initiating or completing a design 2 The product status of the device s described in this data sheet may have changed since this data sheet was published The latest information is available on the Internet at URL http www semiconductors ph
4. x 10 or 1 x 20 W class D audio amplifier 8 FUNCTIONAL DESCRIPTION The TDA8928J is a two channel audio power amplifier system using class D technology The power stage TDA8928J is used for driving the loudspeaker load It performs a level shift from the low power digital PWM signal at logic levels to a high power PWM signal that switches between the main supply lines A 2nd order low pass filter converts the PWM signal into an analog audio signal across the loudspeaker 8 1 Power stage The power stage contains high power DMOS switches drivers timing and handshaking between the power switches and some control logic see Fig 1 The following functions are available Switch pins SW1 and SW2 digital inputs switching from Vss to Vss 12 V and driving the power DMOS switches Release pins REL1 and REL2 digital outputs switching from Vss to Vss 12 V follow pin SW1 and SW2 with a small delay Note for self oscillating applications this pin is not used Power up pin POWERUP must be connected to a continuous supply voltage of at least Vss 5 V with respect to Vss e Enable pins EN1 and EN2 digital inputs at a level of Vss the power DMOS switches are open and the PWM outputs are floating at a level of Vss 12 V the power stage is operational Diagnostics pin DIAG digital open drain output pulled down to Vss if the maximum temperature or maximum current is exceeded 2004 May 05 Preliminary specific
5. 103 105 105 2 x 8 Q SE Vp 12 5 V 1 Po 1W 2 Po 10W Fig 14 Channel separation as function of 2 x 8 Q SE Vp 12 5 V Vi 100 mV Fig 15 Gain as function of frequency Fig 13 S N as function of output power frequency MDB624 MGX389 35 24 G Po dB W 30 20 25 16 1 20 12 2 15 10 4 10 102 103 104 105 10 12 14 16 18 20 THD N 10 fi 1 kHz 1 2x8QSE 2 2x16QSE Fig 16 Output power as function of supply voltage 2004 May 05 18 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D i Le TDA8928J audio amplifier 16 PACKAGE OUTLINE DBS17P plastic DIL bent SIL power package 17 leads lead length 7 7 mm SOT243 3 non concave view B mounting base side DIMENSIONS mm are the original dimensions UNT A A2 bp c D d Dp 4 6 24 0 i uu 44 23 6 9 Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included OUTLINE REFERENCES EUROPEAN VERSION JEDEC JEITA PROJECTION
6. 2 2 nF 50 V SMD0805 C12 C13 15 nF 50 V SMD06805 C40 C41 C1 C2 C16 C17 100 nF 50 V SMD0805 C26 C38 C8 C9 C10 C11 C34 C35 47 nF 50 V 220 nF 50 V SMD1206 SMD1206 COMMENTS C8 to C11 used as jumper C32 C33 C24 C25 470 nF 63 V 1 uF 16 V MKT SMD1206 1206 due to supply range C7 C14 C15 C27 C3 C4 C5 C6 22 uF 100 V 470 uF 35 V Panasonic NHG Series ECA1JHG220 Panasonic M Series ECA1VM471 63 V is OK C18 C23 C36 R10 R26 R28 R29 these capacitors have been removed SMD1206 used as jumpers R24 5 6 Q 0 25 W SMD0805 SMD1206 short circuited in a new printed circuit board layout R19 R21 R22 R23 22 Q 1 W 150 Q SMD2512 SMD1206 1206 due to dissipation 2512 due to dissipation 100 Q 1 ko SMD1206 SMD1206 used as jumper used as jumper R3 R4 R16 1kQ 2 kQ SMD0805 SMD1206 used as jumper 5 2 5 R3 R3 R9 2 R11 R12 R 2 kQ SMD0805 used as jumpers R7 R8 R33 R34 3 9 kQ SMD0805 R17 5 6 KQ SMD0805 R1 R2 R15 SMD0805 R13 R14 SMD0805 R30 R31 SMD0805 R5 R6 220 kQ SMD0805 R18 R20 R27 these resistors have been removed 2004 May 05 16 Philips Semiconductors Power stage 2 x 10 or 1 x 20 W class D audio amplifier 15 5 Curves measured in reference design Preliminary specification TDA8928J MGX383 102 TH
7. D N 10 1072 1078 107 1071 1 10 2 x 8 Q SE Vp 12 5 V 1 6 kHz 2 1 kHz 3 100 Hz Fig 9 THD N as function of output power MGX384 10 THD N 76 10 10 2 103 10 102 103 2 x 8 Q SE Vp 12 5 V 1 Po 10W 2 Po 1W Fig 10 THD N as function of frequency MGX385 60 40 20 2 x 8 Q SE Vp 12 5 Vi fi 1 kHz Fig 11 Efficiency as function of output power MGX386 0 SVRR dB 10 10 102 103 104 fi H2 Vp 12 5 V Viipple p p 2 V 1 Both supply lines in phase 2 One supply line Vss rippled 3 One supply line Vpp rippled 4 Both supply lines in antiphase Fig 12 SVRR as function of frequency 2004 May 05 17 Philips Semiconductors Power stage 2 x 10 or 1 x 20 W class D audio amplifier 100 MGX387 S N dB 80 60 40 20 Po W 2 x 8 Q SE Vp 12 5 V Preliminary specification TDA8928J MGX388 0 102
8. INTEGRATED CIRCUITS DATA SHEET TDA8928J Power stage 2 x 10 or 1 x 20 W class D audio amplifier Preliminary specification 2004 May 05 Supersedes data of 2004 Feb 04 Philips PHILIPS Semiconductors DH l LI P Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D audio amplifier TDA8928J CONTENTS 1 FEATURES 2 APPLICATIONS 3 GENERAL DESCRIPTION 4 QUICK REFERENCE DATA 5 ORDERING INFORMATION 6 BLOCK DIAGRAM 7 PINNING 8 FUNCTIONAL DESCRIPTION 8 1 Power stage 8 2 Protection 8 2 1 Maximum temperature 8 2 2 Maximum current 9 LIMITING VALUES 10 THERMAL CHARACTERISTICS 11 QUALITY SPECIFICATION 12 DC CHARACTERISTICS 13 AC CHARACTERISTICS 14 SWITCHING CHARACTERISTICS 2004 May 05 15 15 1 15 2 15 3 15 4 15 4 1 15 4 2 15 5 16 17 17 1 17 2 17 3 17 4 18 19 TEST AND APPLICATION INFORMATION SE application Package ground connection Output power Reference design Printed circuit board Bill of materials Curves measured in reference design PACKAGE OUTLINE SOLDERING Introduction to soldering through hole mount packages Soldering by dipping or by solder wave Manual soldering Suitability of through hole mount IC packages for dipping and wave soldering methods DATA SHEET STATUS DEFINITIONS DISCLAIMERS Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D A TDA8928J audio amplifier 1 FEA
9. TDA8928J T00 rF 22 uF 100 V power ON DZ1 o o T 15 KQ 36V R31 SSP In2 R8 c41 R28 T 00 Q1 Vgsp Vppp 3 9kQ 47nF R25 BC848 C25 39 ka R29 2kQ 1 uF R6 02 R16 v T w t I L4 220 kQ sse Cas oz es m ae neo C21 T 100 nF 33V BC856 5 6 kQ I 220 pF Vase 33 pl ct cos iss n 2 2 nF mE M Vssp 15nF 80 5 NS LM393 H C6 7 L Lon R21 C22 470 uF 35 V T 220 nF 5 62 2 2 nF 6 R12 2kQ n VppP ii TG STAB U1 9 y 1 eso R34 T 560 pF 3 9 kQ id C42 R35 L C31 l 560 pF 22nF 1500 h po 10 ka Vssp mgx380 Fig 5 Single ended self oscillating class D system application diagram for TDA8928J Jeuduue oipne qr Ssep M Oz X JO OL X z eBeis Jewog r8c68V0L SJojonpuooruleg sdi iugd uoneoioeds Aeuiuljald Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D l TDA8928J audio amplifier 15 4 1 PRINTED CIRCUIT BOARD The printed circuit board dimensions are 8 636 x 5 842 cm single sided copper of 35 um silk screen on both sides 79 holes 94 components 32 resistors and 41 capacitors C2 our J CO 2v V C13 GND DD Bottom silk MDB615 Fig 6 Printed circuit board bottom silk layout for TDA8928J Bottom copper MDB617 Fig 7 Printed circuit board bottom copper layout for TDA8928J 2004 May 05 14 Philips Semiconductors Power stage 2 x 10 or 1
10. TURES 3 GENERAL DESCRIPTION e High efficiency gt 90 96 The TDA8928J is a switching power stage for a high e Supply voltage from 47 5 V to 30 V efficiency class D audio power amplifier system e Very low quiescent current With this power stage a compact 2 x 10 W self oscillating digital amplifier system can be built operating with high d efficiency and very low dissipation No heatsink is Diagnostic output required The system operates over a wide supply voltage Usable as a stereo Single Ended SE amplifier range from 7 5 V up to 30 V and consumes a very low quiescent current High output power Electrostatic discharge protection pin to pin No heatsink required N APPLICATIONS Television sets Home sound sets Multimedia systems All mains fed audio systems 4 QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MAX UNIT supply voltage total quiescent current no load connected Vp 12 5 V efficiency Po 10 W RL 8 Q Vp 12 5 V Stereo single ended configuration output power Ri 8 Q THD 10926 Vp 12 5 V RI 16 Q THD 10 Vp 12 5 V 5 ORDERING INFORMATION TYPE PACKAGE NUMBER NAME DESCRIPTION VERSION TDA8928J DBS17P _ plastic DIL bent SIL power package 17 leads lead length 7 7 mm SOT243 3 TDA8928ST RDBS17P plastic rectangular DIL bent SIL power package 17 leads row SOT577 2 spacing 2 54 mm 2004 May 05 3 Philips Semiconductors
11. ation TDA8928J 8 2 Protection Temperature and short circuit protection sensors are included in the TDA8928J The diagnostic output is pulled down to Vss in the event that the maximum current or maximum temperature is exceeded The system shuts itself down when pin DIAG is connected to pins EN1 and EN2 8 2 1 MAXIMUM TEMPERATURE Pin DIAG becomes LOW if the junction temperature Tj exceeds 150 C Pin DIAG becomes HIGH again if Tj is dropped to approximately 130 C so there is a hysteresis of approximately 20 C 8 2 2 MAXIMUM CURRENT When the loudspeaker terminals are short circuited this will be detected by the current protection Pin DIAG becomes LOW if the output current exceeds the maximum output current of 2 A Pin DIAG becomes HIGH again if the output current drops below 2 A The output current is limited at the maximum current detection level when pin DIAG is connected to pins EN1 and EN2 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D A TDA8928J audio amplifier 9 LIMITING VALUES In accordance with the Absolute Maximum Rate System IEC 60134 SYMBOL PARAMETER CONDITIONS MIN MAX UNIT Vp supply voltage 30 V VP sc supply voltage for short circuits across the load loRM repetitive peak current in output pins Tstg storage temperature Tamb ambient temperature Tyj virtual junction temperature 150 C Vesd HBM electrostatic discharge vo
12. diately after soldering to keep the temperature within the permissible limit This text gives a brief insight to wave dip and manual soldering A more in depth account of soldering ICs can be found in our Data Handbook IC26 Integrated Circuit Packages document order number 9398 652 90011 Wave soldering is the preferred method for mounting of through hole mount IC packages on a printed circuit 17 3 Manual soldering board Apply the soldering iron 24 V or less to the lead s of the package either below the seating plane or not more than 172 gt Soldering by dipping r by selder Wave 2 mm above it If the temperature of the soldering iron bit Driven by legislation and environmental forces the is less than 300 C it may remain in contact for up to worldwide use of lead free solder pastes is increasing 10 seconds If the bit temperature is between Typical dwell time of the leads in the wave ranges from 300 and 400 C contact may be up to 5 seconds 3 to 4 seconds at 250 C or 265 C depending on solder material applied SnPb or Pb free respectively 17 4 Suitability of through hole mount IC packages for dipping and wave soldering methods SOLDERING METHOD PACKAGE DIPPING CPGA HCPGA suitable DBS DIP HDIP RDBS SDIP SIL suitable suitable PMFP 2 _ not suitable Notes 1 For SDIP packages the longitudinal axis must be parallel to the transport direction of the printed circuit board 2 For PMFP
13. enced to Vss 10 15 V fic lower eres 0 fv Control outputs pins REL1 and REL2 HIGH level output voltage referenced to Vss Internal stabilizer logic supply pin STAB LOW level output voltage referenced to Vss Diagnostic output pin DIAG open drain LOW level output voltage IpiAG 1 mA note 1 output leakage current no error condition Enable inputs pins EN1 and EN2 Vin HIGH level input voltage referenced to Vss 15 V V twine rine ren og of v I EN input current 300 uA Switching on input pin POWERUP VPOWERUP operating voltage referenced to Vss 12 V I POWERUP input current MisoWEHUE S EM Temperature protection Tdiag temperature activating diagnostic VpiaG Vpiaa Low hysteresis on temperature VpiaG VDIAG LOW diagnostic Current protection lO ocpl overcurrent protection level 2 1 A Note 1 Temperature sensor or maximum current sensor activated 2004 May 05 8 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D i TDA8928J audio amplifier 13 AC CHARACTERISTICS Vp 12 5 V Tamb 25 C unless otherwise specified SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT Single ended application note 1 output power RL 8Q THD 0 5 THD 10 R 162 THD 0 5 THD 10 total harmonic distortion Po 1 W note 3 fi 1 kHz fi 10 kHz Po 2 x 10 W fi 1 kHz note 4 n eff
14. iciency endstage Notes 1 Vp 12 5 V Ry 8 Q fi 1 KHZ fose 310 kHz Rs 0 1 Q series resistance of filter coil Tamp 25 C measured in reference design SE application shown in Fig 5 unless otherwise specified 2 Indirectly measured based on Rgsion measurement 3 Total Harmonic Distortion THD is measured in a bandwidth of 22 Hz to 20 kHz AES 17 brickwall filter When distortion is measured using a low order low pass filter a significantly higher value will be found due to the switching frequency outside the audio band Measured using the typical application circuit given in Fig 5 4 Efficiency for power stage 2004 May 05 9 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D y TDA8928J audio amplifier 14 SWITCHING CHARACTERISTICS Vp 12 5 V Tamp 25 C measured in Fig 4 unless otherwise specified SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT PWM outputs pins OUT1 and OUT2 see Fig 3 t rise time t fall time tolank blanking time propagation delay from pin SW1 SW2 to pin OUT1 OUT2 tw min minimum pulse width Ras on on resistance of the output transistors l fog e VDD PWM output V OV Vss apes E as equ E tr tr ER gt tplank i VSTAB Vsw V MGW145 100 ns pa Fig 3 Ti
15. ilips com 3 Fordata sheets describing multiple type numbers the highest level product status determines the data sheet status 19 DEFINITIONS Short form specification The data in a short form specification is extracted from a full data sheet with the same type number and title For detailed information see the relevant data sheet or data handbook Limiting values definition Limiting values given are in accordance with the Absolute Maximum Rating System IEC 60134 Stress above one or more of the limiting values may cause permanent damage to the device These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied Exposure to limiting values for extended periods may affect device reliability Application information Applications that are described herein for any of these products are for illustrative purposes only Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification 2004 May 05 20 DISCLAIMERS Life support applications These products are not designed for use in life support appliances devices or Systems where malfunction of these products can reasonably be expected to result in personal injury Philips Semiconductors customers using or selling these products for use in such applications d
16. ithout notice No liability will be accepted by the publisher for any consequence of its use Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights Printed in The Netherlands R30 02 pp23 Date of release 2004 May 05 Document order number 9397 750 13041 Lett make things bel i S amp PHILIPS
17. ltage note 1 HBM all pins with respect to Vpp class 1a 500 500 V all pins with respect to Vss class 1a 1500 41500 V all pins with respect to each other 1500 41500 V class 1a Vesd MM electrostatic discharge voltage note 2 MM all pins with respect to Vpp class B 250 250 V all pins with respect to Vss class B 250 250 V all pins with respect to each other 250 250 V class B Notes 1 Human Body Model HBM Rs 1500 Q C 100 pF 2 Machine Model MM Rs 10 Q C 200 pF L 0 75 uH 10 THERMAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS VALUE UNIT Rih a thermal resistance from junction to ambient in free air 40 K W Rin j c thermal resistance from junction to case in free air 1 5 K W 11 QUALITY SPECIFICATION In accordance with SNW FQ611 if this device is used as an audio amplifier 2004 May 05 7 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D be TDA8928J audio amplifier 12 DC CHARACTERISTICS Vp 12 5 V Tamb 25 C measured in test diagram of Fig 4 unless otherwise specified SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT Supply Vp supply voltage 7 5 12 5 30 V la tot total quiescent current no load connected 25 45 mA wwwsfesng s i9 jm _ VO STAB stabilizer output voltage referenced to Vss 11 7 13 14 3 V Switch inputs pins SW1 and SW2 Vin HIGH level input voltage refer
18. ming diagram PWM output switch and release signals 2004 May 05 10 80 e N rooz LL CONTROL AND HANDSHAKE DIAG TEMPERATURE SENSOR 4 AND D ve CURRENT PROTECTION POWERUP pa DRIVER 100 L CONTROL HIGH nF AND HANDSHAKE BENER _ Low D O O O VEN Vswi VREL1 VSTAB VpiAG Vsw2 12V 12V o TM M MGX379 Fig 4 Test diagram SJojonpuooruleg sdijiud Jojdue oipne NOILVINYOSNI NOILVOIIddV QNV LSSL SL q ssej M OZ X 10 OL X Z eBeis oMOY l 8c68V L uoneouioeds jeutu eJd Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D y TDA8928J audio amplifier 15 1 SE application For a SE application the application diagram as shown in Fig 5 can be used 15 2 Package ground connection The heatsink of the TDA8928J is connected internally to Vss 15 3 Output power The output power in SE self oscillating class D applications can be estimated using the formula Y n Tn rq m x P _ R Ras on Rs n 0 1 7 2x R _ Vp Ri Ras on R s The maximum current lo should not exceed 2 A Where R load impedance Rs series resistance of filter coil Po 19 output power just at clipping The output power at THD 10 96 Po 19s 1 25 x Poii 15 4 Reference design The refe
19. o so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application Right to make changes Philips Semiconductors reserves the right to make changes in the products including circuits standard cells and or software described or contained herein in order to improve design and or performance When the productis in full production status Production relevant changes will be communicated via a Customer Product Process Change Notification CPCN Philips Semiconductors assumes no responsibility or liability for the use of any of these products conveys no licence or title under any patent copyright or mask work right to these products and makes no representations or warranties that these products are free from patent copyright or mask work right infringement unless otherwise specified Philips Semiconductors a worldwide company Contact information For additional information please visit http www semiconductors philips com Fax 31 40 27 24825 For sales offices addresses send e mail to sales addresses www semiconductors philips com Koninklijke Philips Electronics N V 2004 SCA76 All rights are reserved Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner The information presented in this document does not form part of any quotation or contract is believed to be accurate and reliable and may be changed w
20. rence design for a self oscillating class D system for the TDA8928J is shown in Fig 5 The Printed Circuit Board PCB layout is shown in Figs 6 7 and 8 The bill of materials is given in Section 15 4 2 2004 May 05 12 Go e N rooz L L1 Rn I Gp GR Voor supply 14 5 V e 470 pF 1 T 35 V 2 3 C4 14 5 V c2 470 pF I 100 nF T 35V 2 LY YVY bead Vssp R1 Vppp Vpppe 10 ko os C28 C39 R32 ij 560 pF ll DDP l LI 22nF 1000 R33 I C28 r 3 9 R9 C14 cs 2 470 pF C10 560 pF R3 kQ 1kQ 22 uF 100 V T 85 V 220 nF R19 T T t 5 62 Vssp Wk STAB U1 9 C19 ll g U2A 16 R11 2 2 nF 2 LM393 100 nF 2kQ LS1 c20 1 l 80 22nF spi CV LS R5 1 100 nF J3 jo L 24 220 kQ 2 c45 VppP R13 n m tco m tHe Joke I x lm Vppp OAI 22 uF Int 47nF 39kO pag 100 V R15 U1 C28 H ca oo 1 Ria toko 2221
21. x 20 W class D Preliminary specification M TDA8928J audio amplifier TDA8928ST om i O Ji state of D art c Vp typ 12 5 V 2x10Win8Q single layer L4 demo PCB v2r4 a RL 1 2003 COR 4E C3 ee SG C32 C33 TOM ma MAS pze Fil Ed e e zl DONIS AW cus up l 2 F power_on Top silk mgx381 Fig 8 Printed circuit board top silk layout for TDA8928ST 15 4 2 BILL OF MATERIALS COMPONENT DESCRIPTION TYPE COMMENTS TDA8928ST Philips Semiconductors SOT577 2 National SO8 alternatives TI semiconductors and On semiconductors 3 3 V Zener diode BZX 79C36V DO 35 BZX 79C3V3 DO 35 used as jumper BC848 transistor BC856 transistor NPN SOT23 PNP SOT23 used as jumper optional 36 V Zener diode L1 L2 bead Murata BL01RN1 A62 Toko 11RHBP 330M ws used as jumper totally shielded L3 L4 33 uH coil power on switch PCB switch SACME 09 03290 01 Augat 5KEV 03 optional Con1 Vss GND Vpp connector Con2 Con3 Out2 Out1 connector Augat 5KEV 02 Cinch Farnell 152 396 optional optional CO1 CO2 In1 In2 connector J1 J2 J3 wire Jumpers D 0 5 mm Capacitors C37 220 pF 50 V SMD0805 C28 C29 C30 560 pF 100 V SMD0805 50 V is OK C31 2004 May 05 15 Philips Semiconductors Preliminary specification Power stage 2 x 10 or 1 x 20 W class D TDA8928J audio amplifier COMPONENT DESCRIPTION C19 C20 C21 C22 C39 C42
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