TAS576xM 2x50-W/4-Ω PurePath Smart Amp

1 Features

PurePath Smart Amp:
- Optimizes and Protects Dynamic Loudspeakers
- Bass Q-compensation and Frequency Extension: More Loudness, Bass Enhancement, Better Clarity and Higher Fidelity.
- Thermal and Excursion Limitation.
Stereo Class-D Amplifier With:
- Wide Power Supply Range: 4.5 V –26.4 V
- Wide Load Range: 2 Ω – 8 Ω;
- High output current: 2x 7.5 A
- Peak output power 2x 50 W/4 Ω
- Continuous Power: 2x 20 W w/o heat sink
- Click and Pop free: Power, Mute and Standby ON/OFF
- Low Output Noise: <60 µVrms at 12 V-supply, <90 µVrms at 24-V supply
- Low THD+N: <0.02% at 1 W/4 Ω, 1 kHz
- Thermal, Over-Current and Short-Circuit Protected
Configurable Digital Audio Processor.
- Down Mixing and Custom EQ with 10 BiQuads
Digital Audio Interface: I²S or TDM input w.
- 44.1 kHz and 48 kHz FS
- Configurable Digital Output
Multisegment DAC with Excellent Jitter Suppression
Integrated High-Performance Audio PLL
I²C control
48-pin PowerPAD™ HTSSOP or VQFN Package

2 Applications

Audio Docks
Soundbars
Laptops
All-In-One Computers
Digital TVs

3 Description

The TAS576xM PurePath Smart Amp enhance the bass, sound fidelity and provide more loudness and at the same time drive a speaker to its thermal and mechanical limits.

The TAS576xM contains two BTL class-D amplifiers – with up to 2x50W peak into 4Ω. The amplifier is thermally designed to fit with the typical speaker so it can handle high peaks for the time it takes the speaker voice-coil to heat up, and then it lowers the average power to safe limits.

The wide supply range of 4.5 V to 26.4 V enables the use of a wide range of different power supply options from 2-cell Li-Ion batteries to fixed 24 V supply.

TI's PurePath Smart Amp technology allow speakers to be driven with more peak power than their average power rating, without fear of damage to the speaker through over excursion or thermal-overload.

Device Information^⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TAS5766M	HTSSOP (48)	12.50 mm × 6.10 mm
TAS5766M	VQFN (48)	7.00 mm × 5.00 mm
TAS5768M	VQFN (48)	7.00 mm × 5.00 mm

For all available packages, see the orderable addendum at the end of the datasheet.

Device Images

Smart Amplifier Overview

TAS5766M TAS5768M TAS5766M_SLAS965_fig2.gif

4 Revision History

Changes from C Revision (September 2014) to D Revision

Added paragraph to clarify the 3-wire mode of I2S operationGo

Changes from B Revision (September 2014) to C Revision

Added NOTE and additional descriptive text to Applications and Implementation section. Go
Moved Detailed Register Map Descriptions section Go

Changes from A Revision (June 2014) to B Revision

Added descriptions for CDST[5] through CDST[0] in Register 94 (Hex 0x5E); and changed Bit 6 description from CDST[6:0] to CDST[6].Go

Changes from * Revision (September 2013) to A Revision

Revised data sheet to new format; added Device Information table to first page.Go
Added TAS5768M device Go
Added RMT package option Go

5 Pin Configuration and Functions

RMT Package

48-Pin VQFN

Top View

DCA Package

48-Pin HTSSOP

Top View

Pin Functions

SYMBOL	HTTSOP PIN No.	VQFN PIN No.	TYPE⁽¹⁾	DESCRIPTION
ADR1	26	45	I	LSB address select bit for I²C
ADR2	20	39	I	2nd LSB address select bit for I²C
AVCC	41	12	PI	Analog Supply – connect to PVCC
AVDD	14	33	PI	Analog Supply
BCLK	23	42	I	Audio data bit clock input
BSNL	48	19	BST	Boot strap negative Left channel output, connect to 220 nF X7R ceramic cap to OUTNL
BSNR	1	20	BST	Boot strap negative Right channel output, connect to 220 nF X7R ceramic cap to OUTNR
BSPL	44	17	BST	Boot strap positive Left channel output, connect to 220 nF X7R ceramic cap to OUTPL
BSPR	5	22	BST	Boot strap positive Right channel output, connect to 220 nF X7R ceramic cap to OUTPR
CAPM	34	5		Charge pump flying capacitor pin for negative rail
CAPP	32	3		Charge pump flying capacitor pin for positive rail
CPVDD	31	2	PI	Charge pump power supply, 3.3 V
DACL	36	7	O	Analog output from DAC left channel, ground centered
DACR	13	32	O	Analog output from DAC Right channel, ground centered
DIN	24	43	I	Audio data input
DVDD	30	1	PI	Digital power supply, 3. 3 V
FAULT	40	11	OD	General fault reporting, Open Drain, High = normal operation, Low = fault condition
GAIN/FSW	9	28	I	Sets power stage Gain and selects output switching frequency
GND	3, 10, 15, 29, 33, 39, 46	4, 10, 14, 15, 24, 25, 29, 34, 48	G	Ground
GPIO1	18	37	I/O	General purpose digital input and output port
GPIO2	19	38	I/O	General purpose digital input and output port
GPIO3	21	40	I/O	General purpose digital input and output port
GVDD	8	27	PBY	Internal Gate drive supply, connect 1uF to GND
INNL	38	9	I	Negative audio input for Left channel. Internally biased at 3 V
INNR	11	30	I	Negative audio input for Right channel. Internally biased at 3 V
INPL	37	8	I	Positive audio input for Left channel. Internally biased at 3 V
INPR	12	31	I	Positive audio input for Right channel. Internally biased at 3 V
LDOO	28	47	PBY	Internal logic supply rail pin for decoupling, 1.8 V, connect 1 µF to GND
LRCLK	25	44	I	Audio data word clock input
OUTNL	47	18	PO	Negative Left channel output
OUTNR	2	21	PO	Negative Right channel output
OUTPL	45	16	PO	Positive Left channel output
OUTPR	4	23	PO	Positive Right channel output
PVCC	6, 7, 42, 43	13, 26	PI	4.5-V to 26.4-V Power supply
SCL	17	36	I	Input clock for I²C
SCLK	22	41	I	System clock input (also referred to as master clock input)
SDA	16	35	I/O	Input data for I²C
Thermal pad	49	49	G	Connect Thermal Pad to Ground
VNEG	35	6	PO	Negative charge pump rail pin for decoupling –3.3 V
XSMT/UVP	27	46	I	Soft mute control : Soft mute (Low) / soft un-mute (High)

(1) TYPE: BST=Boot Strap, PO=Power Output, G = General Ground, I= Input, O= Output, I/O = Input or Output, , PBY=Power Bypass, , PI=Power Input,.