AEK-AUD-D903V1

AEK-AUD-D903V1 Data brief Class D automotive audio amplifier board with advanced diagnostics Features • • • • • • • • • • • With FDA903D class D automotive grade audio amp Mono channel up to 45 W Supports audio stream via I²S interface Configurable through dedicated I²C bus Dedicated DC diagnostic interrupt pin to signal faults Dedicated hardware MUTE pin Open load in play detection Short to Vcc / GND diagnostic Thermal protection Part of the AutoDevKit initiative RoHS compliant Description This evaluation board for the FDA903D 1 x 45 W class D digital input automotive power amplifier, with load current monitoring and wide voltage operation range, is highly suitable for typical automotive audio, infotainment and telematic applications in conjunction with suitable automotive microcontrollers. Product summary MCU discovery board for SPC5 Chorus 1M automotive microcontroller AEK-MCUC1MLIT1 AutoDevKit library plugin for SPC5-STUDIO STSWAutoDevKit 1 x 45 W class D digital input automotive power amplifier with load current monitoring, wide voltage operation range for car audio and telematic - slug down version FDA903D The amplifier can also be interfaced with the SPC582B Chorus automotive microcontroller and can also provide Electric Vehicle Warning Sounds (or Acoustic Vehicle Alerting Systems, AVAS) solutions. The FDA903D amplifier comes in a PowerSSO-36 slug-down package and features a configurable power limiting function, high-speed I²C and legacy mode interfaces, and an internal finite state machine. The initial state of the device is the standby state from which it will not be possible to exit until the I2C interface has been correctly enabled: this means providing correct supply voltage, the I2S clock, the I2S data and a valid combination of enable pins in order to determine the I2C device address. This system is required by new vehicles to alert pedestrians of the presence of electric powered vehicles that are generating much less noise. Warning sounds may be driver triggered (like a horn) or automatic mimicking engine sounds. From 2021 according to government regulations, the vehicle must make a continuous noise level of at least 56 dBA (within 2 meters) if the car is going 20 km/h (12 mph) or slower, and a maximum of 75 dBA. Each combination of the Enable pins represents an address. Up to eight devices can be used in the same application with a single I2C bus. The internal I2C registers are pre-set in "default condition", waiting for the I2C next instruction. The return in Standby condition, (i.e. all enable pins at 0), will result in a reset for the amplifier. As defined in the finite state machine, the same event will happen if PLL is not locked, I2S is missing or not correct, Vcc is removed for system reset. FDA903D works only in I2C slave mode. The combination of AEK-AUD-D903V1 with AEK-MCU-C1MLIT1 hosting SPC582B Chorus automotive microcontroller offers a viable low-cost solution for entry-level AVAS systems. DB4202 - Rev 1 - June 2020 For further information contact your local STMicroelectronics sales office. www.st.com AEK-AUD-D903V1 1 Block diagrams and schematic diagrams 1.1 Block diagrams Figure 1. Block diagram DB4202 - Rev 1 page 2/5 DB4202 - Rev 1 1.2 Schematic diagram Figure 2. Schematic diagram U1 36 VCC1 R7 0R SPEAKERS CONNECTOR 35 34 33 1 CH1+ 2 CH1- J1 L1 10uH C3 1uF OUT1+ 32 XAL6060-103MEC R5 0R NM C5 R3 C1 3.3uF 50V C7 5nF 330pF 10 FB1+ 31 MUTE 30 SVR 29 AGSVR 28 C8 C9 C10 4.7uF 10nF 100pF R1 10 A5VSVR 27 26 AVdd 25 3V3 R24 R25 5,6k 5,6k I2S_WS R18 100 24 I2S_SCL R19 100 23 I2S_SDA1 R20 100 22 R21 100 I2S_TEST 21 I2C_SCL R22 100 20 I2C_SDA R23 100 19 GNDP TAB VCCP GNDM NC VCCM OUTP OUTM OUTP OUTM FBP FBM HWMUTE NC SLUG DOWN SVR DGND Power SSO-36 (exposed pad) AGSVR A5VSVR DVDD ENABLE 1 AVDD ENABLE 2 AGND ENABLE 3 I2SWS ENABLE 4 I2SCLK THSENS I2SDATA CDDIAG I2STEST NC I2CCLK D1V8SVR I2CDATA DGSVR 1 2 3 R8 VCC2 0R 4 5 OUT1- 6 FB1- L2 R6 8 C6 3.3uF 50V R4 10 9 DVdd 10 EN1 11 EN2 12 EN3 13 EN4 R2 10 TP5 THS 14 15 CH1C4 1uF C2 330pF 7 10uH XAL6060-103MEC 0R NM CD/DIAG 16 17 D1V8SVR 18 DGSVR BLM3 BLM18BA220SN1 C15 C16 C17 100pF 10nF 4.7uF FDA903D TO MCU BOARD J10 R9 10nF 1k TP3 3V3 L3 4.7uH J3 D3 S S S C23 C22 4.7uF 4.7uF 1 2 3 TP2 VCC 100pF 22k R17 22k VCC1 MMBZ5244B R16 4 SM6T36CAY 2 GND D D D D G 1 +12Vin 8 7 6 5 C26 1uF TP1 GND D2 C28 C29 C20 C21 220uF 220uF 33nF 33pF C18 C19 100nF 1uF 100nF C25 1uF EN3 EN4 C27 100nF TP4 GND EN1 EN2 VCC2 C24 D1 1 2 3 4 J2 1 2 3 4 5 6 7 8 5 6 7 8 1 2 I2S_WS 3 4 I2S_SDA1 5 6 I2S_SDA2 7 R10 I2C_SCL MUTE 10 12 13 14 I2C_SDA 15 17 18 CD/DIAG 19 20 Vbatt C34 C30 10nF 10nF C31 10nF C32 10nF C33 10nF 16 21 22 23 24 26 27 28 29 30 31 R31 100 8 9 11 25 Strip male 4x2 R29 10k 10nF Q1 STS10P4LLF6 Vbatt 3V3 R14 10k NM C14 R28 10k C13 R13 10k NM BLM18BD102SN1 R11 10k NM D4 I2S_SCL I2S_TEST R15 10k NM AVdd BLM2 Green Led PTC 24V 29MA C12 100pF R27 10k 1,5k C11 R12 10k R30 R26 10k GND Vbatt DVdd 1 2 MMSZ4684T1 J4 VBAT 32 33 34 35 36 37 38 39 40 20x2 p2.54mm M-F STD DONGLE CONNECTOR AEK-AUD-D903V1 Schematic diagram page 3/5 AEK-AUD-D903V1 Revision history Table 1. Document revision history DB4202 - Rev 1 Date Version 24-Jun-2020 1 Changes Initial release. page 4/5 AEK-AUD-D903V1 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products 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 of Purchasers’ 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 service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2020 STMicroelectronics – All rights reserved DB4202 - Rev 1 page 5/5