Diodes Incorporated PAMS5826 Digital Input Class-D Audio Amplifier
Diodes Inc. PAMS5826 Digital Input Class-D Audio Amplifier is a fully integrated, high-efficiency, stereo Class-D audio amplifier with digital inputs. The application circuit requires a few passive components to operate with a 4.5V to 26.4V PVDD supply and either a 3.3V or 1.8V DVDD supply. The amplifier drives 2×40W output power into BTL 6Ω and 1×80W into PBTL 3Ω at 1% THD+N.
The PAMS5826 features a novel PWM modulation architecture that adjusts the PWM common duty cycle during the startup phase to avoid a startup pop click. Spread-spectrum technology provides lower EMI noise. It enables inductor-free applications with specified output power using the PAMS5826.
The Diodes Inc. PAMS5826 provides one highly integrated solution. It allows turning on/off each block with highly free operations. Both pre- and post-BQs/volume help maintain audio headroom. Furthermore, a three-band DRC with a time delay buffer and post-compensation BQs is available to implement flexible and flat multiple-band control.
The PAMS5826 is packaged in a TSSOP-28EP (Type TH-1) package.
Features
- Flexible power-supply configurations
- PVDD: 4.5V to 26.4V
- DVDD and I/O: 3.3V or 1.8V
- Various output configurations
- 2×40W, stereo mode (6Ω, 24V, THD+N = 1%)
- 1×80W, stereo mode (3Ω, 24V, THD+N = 1%)
- Excellent audio performance
- THD+N ≤ 0.03% at 1W, 1kHz, PVDD = 12V
- 114dB A-weighted Signal-to-Noise Ratio (SNR)
- Idle switching A-weighted noise ≤ 37µVRMS
- 19.1mA low quiescent current at PVDD = 12V, LPD mode
- 90.6% efficiency into 6Ω load, PVDD = 18V, 2×28W
- Configurable digital audio interface
- I2C control with up to four selectable addresses
- I2S, left-justified, right-justified, TDM audio format
- 3-wire digital audio interface without MCLK required
- 32kHz, 44.1kHz/48kHz, 88.2kHz/96kHz, 176.4kHz/192kHz input sample rate
- SDOUT for acoustic echo cancellation with AEC or 1.1/2.1 system sub-channel signal routing
- Advanced audio effect tuning
- Flexible digital and analog gain adjustment
- High-pass filter for DC blocking
- Input signal router for the left and right channels
- 2×15 pre BQs and 2×5 post BQs to support enhanced audio frequency tuning
- Pre and post volume for dynamic headroom and loudness control
- Three-band Dynamic Range Control (DRC) with time delay buffer and post compensation BQs for flexible and flat multiple band control
- Analog protections
- FAULT status report through GPIO and I2C registers
- Overcurrent and direct current protection
- Overtemperature protection
- Undervoltage and overvoltage protection
- Clock error protection
- TSSOP-28EP (Type TH-1) package
- Lead-free finish and RoHS-compliant
- Halogen and antimony-free Green device
Applications
- Portable speakers (BLUETOOTH® and smart speakers with a voice assistant)
- PCs and laptops
- Home audio [TVs, soundbars, STB (set top boxes), HTiB (home theatre in a box)]
Functional Block Diagram
