5.7-W, digital input smart amp with integrated speaker protection, advanced EQ & 8.5-V Class-H boost
Product details
Parameters
Features
- Ultra low-noise mono boosted class-D amplifier
- 5.7 W at 1% THD+N and 6.9 W at 10% THD+N into 4-Ω load from 4.2-V supply
- 3.8 W at 1% THD+N and 4.5 W at 10% THD+N into 8-Ω load from 4.2-V supply
- Output noise for DAC + class-D (ICN) is 15.9 µV
- DAC + class-D SNR 111 dB at 1%THD+N/8 Ω
- THD+N –90 dB at 1 W / 8 Ω with flat frequency response
- Post-filter feedback (PFFB)
- PSRR 110 dB for 200 mVpp ripple at 217 Hz
- Input sample rates from 8 kHz to 96 kHz
- Built-in speaker sense
- Measures speaker current and voltage
- Measures VBAT voltage, chip temperature
- Dedicated real-time dual-core DSP for speaker protection
- Thermal and excursion protection
- Detects speaker leaks and damage
- High efficiency class-H boost converter with multi-level tracking
- 86% at 500 mW in 8 Ω with 3.6 V VBAT
- 87% at 700 mW in 8 Ω with 4.2 V VBAT
- Configurable automatic gain control (AGC)
- Limits battery current consumption
- Adjustable class-D switching edge-rate control
- Thermal, short-circuit, and under-voltage protection
- I2S, Left-justified, right-justified, DSP, and TDM input and output interface,
- I2C or SPI interface for register control
- Stereo configuration using two TAS2557 devices
- Power supplies
- Boost input: 2.9 V to 5.5 V
- Analog/digital: 1.65 V to 1.95 V
- Digital I/O: 1.62 V to 3.6 V
- 42-ball, 0.5-mm pitch, DSBGA package
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Description
The TAS2557 device is a state-of-the-art Class-D audio amplifier which is a full system on a Chip (SoC). The device features a ultra low-noise audio DAC and Class-D power amplifier which incorporates speaker voltage and current sensing feedback. An on-chip, low-latency DSP supports Texas Instruments SmartAmp speaker protection algorithms to maximizes loudness while maintaining safe speaker conditions.
The device can be used easily with any processor with an I2S output and stereo implementations are possible when using two TAS2557 devices. Separate tuning for different speakers is supported allowing customers to add value while maintaining form factor designs. Additionally, the TAS2557 supports separate voice and audio tuning dynamically with ultra-low 15.9 µV ICN regardless of mode of operation making receiver/speaker implementations possible.
A Class-H boost converter generates the Class-D amplifier supply rail. When the audio signal only requires a lower Class-D output power, the boost improves system efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When higher audio output power is required, the multi-level boost quickly activates tracking the signal to provide the additional voltage to the load.
To request access to PurePath™ Console 3 and other design resources: Request TAS2557
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
This board supports: TAS2555YZEVM, TAS2557EVM and TAS2559EVM.
The Smart Amplifier Speaker Characterization Board, when used in conjunction with a supported TI Smart Amplifier and PurePath Console software, provides users the ability to measure speaker excursion, temperature and other parameters for (...)
Features
- Easily and quickly characterize speakers
- Quick connection to TI Smart Amplifier EVMs
- Microphone included for SPL measurements
- Laser input for speaker excursion measurements
Description
The TAS2557EVM evaluation module provides users with a powerful tool kit for complete assessment of the TAS2557 audio amplifier when used with PurePath™ Console 3 software suite (PPC3). The evaluation module ships with an attached reference speaker. The board provides an USB connection to your (...)
Features
- TAS2557 5.7W Class-D Audio Amplifier with Class-H Boost and IV Sense
- Reference speaker
- SPI or I2C control interface
- Onboard USB interface and cable for connection to PC with a Microsoft Windows 7+ operating system
- Access to TAS2555 app for PurePath Console 3
Software development
PurePath Console’s (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
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download TIDA-01589 BOM Files.zip (285KB) -
download TIDA-01589 Assembly Files.zip (428KB) -
download TIDA-01589 Layer Plots.zip (1926KB) -
download TIDA-01589 CAD Files.zip (3682KB) -
download TIDA-01589 Gerber.zip (1589KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
(YZ) | 42 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
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