PlainAMP. PolyVection. embedded audio solutions DATASHEET. PlainAMP chip on module page 1

Transcription

1 PlainAMP DATASHEET Audiophile Class-D amplifier module with I2S input and up to 2 x 35 Watt output August 2016 PlainAMP chip on module page 1

2 1 FEATURES Highly integrated amplifier module Texas Instruments TAS5756M Up to 2 x 35 Watt output power Embedded minidsp for X-over or EQ Two integrated ultra-low noise LDO s for separated supply of DVDD and AVDD Integrated 5V DC/DC converter Onboard I2C temperature sensor Foil type filter capacitors Audio optimized inductors ESD protection on all input and output pins Overvoltage protection Inrush current limitation Integrated 3 A / 24 V polyfuse Playback up to 192 khz / 24 bit Solid power and speaker connectors 40 pin 0.5mm FPC input connector 20 pin 2.54 mm header for accessing signals 2 APPLICATIONS General A/V equipment Prototyping of audio systems Low to medium volume production 3 DESCRIPTION PlainAMP is the latest generation of easy to integrate and highly audiophile Class-D audio amplifiers on a single module. It allows easy and fast building of prototypes and reduces time-to-market significantly when used in the final product. Also reduces cost thanks to the integrated 5V DC/DC converter for downstream supply. Best audio quality due to digital I2S input and high quality filter components on the output side. Two ultra low noise LDO s feeding the amplifier IC offering reduced ripple. Also incorporates advanced protection features such as overvoltage and ESD protection, inrush current limitation and a polyfuse. Thanks to the integrated I2C temperature sensor you can easily watch how warm the PCB gets and e.g. limit volume in a critical state. Great for small and close housings. PlainAMP features robust power input and speaker output connectors with locking mechanism to prevent malfunctions due to loose cables. 4 BLOCK DIAGRAM PlainAMP chip on module page 2

3 Table of Contents 1 Features Applications Description Block Diagram Revision History Dimensions Pins and Connections Electrical specifications ESD Protection Inrush Current Limiter 7 11 Overvoltage Protection Reverse Current Protection 7 13 I2C Temperature Sensor Integrated 5V DC/DC Converter 8 15 General Usage Guidelines Setup and Operating Instructions Using the Embedded minidsp Regulatory information Safety Warnings Disclaimers Revision History August 2016 / Initial release PlainAMP chip on module page 3

4 6 Dimensions PlainAMP chip on module page 4

5 7 Pins and Connections P3 2 x JST B2PS-VH(LF)(SN) Mating: 2 x JST VHR-2N P2 40 pin FPC connector PolyCore1 compatible 0.5 mm pitch Molex SPK-B + 2 SPK-B - I2C Adr. Select Jumper Close for changing 3 SPK-A - 4 SPK-A + P1 20 pin THT connector 2 row / 2.54 mm pitch 1 PWR IN 2 GND P4 JST B2PS-VH(LF)(SN) Mating: JST VHR-2N P2 1-2 GND 25 I2C_SCL 3-10 N.C N.C. 11 FAULT# 28 GPIO2 (AMP) 12 MUTE# 29 (S/PDIF IN)* 13 GND 30 I2S1_MCLK 14 (GPIO)* 31 (I2S1_RX_BCK)* N.C. 32 (I2S1_RX_LRCK)* 17 (I2S2_TX_BCK)* 33 I2S1_TX_DATA 18 (I2S2_RX_DATA)* 34 (I2S1_RX_DATA)* 19 (I2S2_TX_DATA)* 35 I2S1_TX_BCK 20 (I2S2_TX_LRCK)* 36 I2S1_TX_LRCK 21 N.C. 37 DC/DC 3V3 host 22 (I2S2_MCLK)* 38 GND 23 GND V 24 I2C_SDA P1 (I2S2_TX_BCK)* (GPIO)* (I2S2_TX_DATA)* (I2S2_RX_DATA)* (I2S2_MCLK)* (I2S2_TX_LRCK)* I2C_SCL I2C_SDA (S/PDIF IN)* GPIO2 (AMP) (I2S1_RX_BCK)* 10 9 I2S1_MCLK I2S1_TX_DATA 8 7 (I2S1_RX_LRCK)* I2S1_TX_BCK 6 5 (I2S1_RX_DATA)* GND 4 3 I2S1_TX_LRCK 5V 2 1 DC/DC 3V3 from host *available with PolyCore1. Only pass-through connection. PlainAMP chip on module page 5

6 8 Electrical Specifications Absolute Maximum Ratings Min Max Amplifier Power Input -0.3 V (-60 V)* 30 V (60 V)* 5V output -0.3 V 6 V Digital input -0.3 V 3.9 V Operating junction temperature -40 C 130 C Storage temperature -65 C 150 C *available on request Recommended Operating Conditions Min Nom Max Amplifier Power Input 8 V 24 V 5V output voltage 4.8 V 5 V 5.2 V 5V output power 2 A Digital signal input 2.4 V 3.3 V 3.46 V Digital output load capacitance 10 pf Operating junction temperature -40 C 130 C For more detailed specifications and descriptions regarding the TAS5756 IC with its functions and ratings please see the official vendor datasheet for that specific chip. PlainAMP chip on module page 6

7 9 ESD Protection PlainAMP features advanced ESD protection. Great care was taken during development to implement useful protection to minimize potential ESD damage. There are two 5 channel 3V3 unidirectional TVS diodes to protect all the digital input and output signal pins. 10 Inrush Current Limiter On PlainAMP there are some large capacitors with about 900 uf in sum. To prevent excessive current draw from the supply when first powered it incorporates a special circuit that allows slowly charging the downstream capacitance before fully attaching it to the input. No further attention is needed. 11 Overvoltage Protection To prevent any damage to the integrated components there is an overvoltage protection circuit. If the circuit detects an overvoltage condition of 24.8 V or more it will immediately interrupt the power supply. As soon as the input power returns to its recommended range (8 24 V) it will automatically close again. 12 Reverse Current Protection The standard version of PlainAMP comes with reverse current protection in the output of the integrated 5V DC/DC converter. On request it is available with reverse current protection on the amplifier supply input and an expanded maximal rating of the input voltage. Please contact us for details. PlainAMP chip on module page 7

8 13 I2C Temperature Sensor Next to the TAS5756 amplifier IC there is a LM75 I2C temperature sensor. It helps to keep an eye on the board temperature when operating under hard conditions. It is recommended to check the the temperature every 5 to 10 seconds. This is really helpful in small and closed housings where space and cooling is limited. It is e.g. possible to implement a watchdog function that lowers the volume before the amplifier goes into protection mode the hard way. We cannot recommend a temperature threshold as this really depends on the usage scenario. 14 Integrated 5V DC/DC converter PlainAMP incorporates the newest generation of buck converters with super high energy density. It accepts any input voltage from 8 to 28 V and can output 2 A on a very efficient way. It is directly connected to a small reverse protection circuit that makes it save to have more than one 5V source within a single system. 15 General Usage Guidelines The PlainAMP module can be used for prototyping and small volume manufacturing. Before using PlainAMP always make sure that you have understood and compile with your local laws and regulatory regarding prototyping with electronic devices. PlainAMP is NOT sold as a final and/or certified end product. It is designed to work best when using the 40 pin FPC input connector either in combination with our PolyCore1 platform or one of the adapter boards. Remember that when using the unpopulated P2 header for feeding the digital signals you are creating little stubs on the PCB between P1 and P2. This is okay for prototyping but you should keep that in mind when feeding high frequency master clocks. ONLY FOR PROTOTYPING: I2S input 40 pin STUB! 20 pin DBG I2S internal TAS5756 P1 P2 RECOMMENDED: I2S input 40 pin 20 pin DBG I2S internal I2S internal TAS5756 P2 P1 PlainAMP chip on module page 8

9 16 Setup and Operating Instructions Always disconnect any power supplies before attaching or removing cables! Either connect the PlainAMP module to your host system using a 40 pin FPC cable or jumper wires. Also connect your speakers to PlainAMP. After double checking all cables for their correct position insert the power supply and you should see your host start booting if it is powered via the 5V output of PlainAMP. PlainAMP is equipped with a TAS5756 amplifier IC from Texas Instruments. In general, this is a package that combines an I2S DAC (very similar to the PCM51XX devices) and a Class-D amplifier in one single IC. That means all of the available software for PCM512X or PCM514X can and should be used for configuration and volume control. This driver is available in mainline Linux kernel and also in a lot of custom ones. The PlainAMP board contains two devices that communicate through the I2C bus. One of them is the amplifier IC itself and the other one is the temperature sensor. In standard configuration the TAS5756 is available on address 0x4c and the LM75 on 0x48. By closing the onboard jumper both addresses can be changed to 0x4d and 0x49. This allows combining up to two standard PlainAMPs. Other addresses available on request. 17 Using the embedded minidsp TAS5756 features an integrated DSP that can be loaded with custom instructions during runtime. It allows fast and click free switching between two instruction banks. Allows customers to implement e.g. digital crossover configurations and/or finetuning (EQ) of the connected speakers. For the moment please refer to SLAU577a from Texas Instrument and the TAS5754 datasheet for how to configure the DSP. PlainAMP chip on module page 9

10 6 Safety Warnings User must read and apply the user guide / datasheet and other available documentation provided by PolyVection regarding the PlainAMP prior to handling or using PlainAMP, including without limitation any warning or restriction notices. The notices contain important safety information related to, for example, temperatures and voltages. PlainAMP is intended to be used solely by technically qualified, professional electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems, subsystems. Use PlainAMP in laboratory test environment only. Never leave it unattended while in use. Never operate PlainAMP outside of its recommended operating specifications otherwise it may cause personal injury or death or property damage. 7 Regulatory information PlainAMP generates, uses and can radiate radio frequency energy and has not been tested for compliance with any regulatory requirements (e.g. CE, FCC). PlainAMP is not sold as a finished product and may not be resold or otherwise marked unless all required regulatory authorizations are first obtained. 8 Disclaimers TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAW, POLYVECTION, AND ITS SUPPLIERS, SHALL NOT BE LIABLE TO YOU, OR ANY THIRD PARTY, FOR ANY INDIRECT, EXEMPLARY, SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES OF ANY KIND ARISING IN ANY WAY OUT OF USE OF THE PRODUCTS, INCLUDING, WITHOUT LIMITATION, LOSS OF PROFITS, REVENUES OR DATA, OR COSTS OF REPLACEMENT GOODS, EVEN IF POLYVECTION HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND NOTWITHSTANDING THE FAILURE OF ANY LIMITED REMEDY OF ITS ESSENTIAL PURPOSE. TO THE MAXIMUM EXTENT ALLOWED UNDER APPLICABLE LAW, EXCEPT FOR THE EXPRESS LIMITED WARRANTIES SET FORTH ABOVE, PRODUCTS ARE PROVIDED AS IS AND AS AVAILABLE AND POLYVECTION AND ITS SUPPLIERS MAKE NO WARRANTIES UNDER THIS AGREEMENT, EXPRESS, IMPLIED, OR STATUTORY, BY OPERATION OF LAW OR OTHERWISE, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTIES ARISING OUT OF COURSE OF PERFORMANCE, COURSE OF DEALING OR USAGE OF TRADE UNDER OR IN CONNECTION WITH THE PRODUCTS. POLYVECTION DOES NOT WARRANT THAT THE PRODUCTS AND CONTENT WILL OPERATE ERROR-FREE, UNINTERRUPTED, OR THAT THEY WILL BE SECURE OR VIRUS-FREE. NO ORAL OR WRITTEN INFORMATION OR ADVICE GIVEN BY POLYVECTION, ITS AGENTS OR OTHER REPRESENTATIVES OR EMPLOYEES SHALL IN ANY WAY INCREASE THE SCOPE OF POLYVECTION S WARRANTIES UNDER THIS AGREEMENT. WITHOUT LIMITING THE GENERALITY OF THE FORGOING, POLYVECTION AND ITS SUPPLIERS DO NOT MAKE, AND EXPRESSLY DISCLAIM, ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, RELATED TO ANY THIRD PARTY INTELLECTUAL PROPERTY, TECHNOLOGY OR INFORMATION PROVIDED AS PART OF THE PRODUCT OR DOCUMENTATION. WE MAY REVISE THIS DATASHEET AT ANY TIME. ALWAYS MAKE SURE YOU USE THE LATEST ONE. PolyVection UG Habelschwerdter Allee Berlin GERMANY PlainAMP chip on module page 10