Features: • Multi-channel PWM audio amplifier controller
• Supports Stereo input
• Supports stereo or 2.1 with sub channel generation
• PWM Audio Performance with typical output stage− 100dB SNR ('A' weighted @ 48kHz)− 0.01% THD @ 1Watt− 0.1% THD @ 30Watt
• Integrated Bass Management support with adjustable filter
• Integrated 4-band Graphic Equaliser
• Adjustable output stage filter compensation for differentspeakers
• Volume control on each channel +24dB to -103.5dB in0.5dB steps, with volume ramping and auto-mutefunctions
• Programmable Dynamic Peak Compressor avoids clippingeven at high volume settings
• Internal PLL and optional crystal oscillator, supportingAudio and MPEG standards
• 2/3-Wire MPU Serial Control Interface
• Master or Slave Clocking Mode
• Programmable Audio Data Interface Modes− I2S, Left, Right Justified or DSP− 16/20/24/32 bit Word Lengths
• De-emphasis support for stereo
• CMOS digital outputsApplication• Hi-Fi systems
• Automotive Audio
• Boombox
• Active SpeakersPinout
Specifications
| CONDITION |
MIN |
MAX |
| Analogue supply voltage (AVDD) |
-0.3V |
+5V |
| Digital supply voltage (DVDD) |
-0.3V |
+5V |
| PWM output buffer supply voltage (BVDD) |
-0.3V |
+5V |
| Voltage range inputs |
DGND -0.3V |
DVDD +0.3V |
| Master Clock Frequency |
10MHz |
50MHz |
| Operating temperature range, TA |
-20°C |
+85°C |
| Storage temperature |
-65°C |
+150°C |
DescriptionThe WM8602 comprises a high performance stereo + subPWM digital power amplifier controller. Simply by addingappropriate power output stages a 2.1 channel poweramplifier may be built. Two identical full audio bandwidthchannels, plus a reduced bandwidth sub channel areprovided as PWM outputs.
The PCM to PWM converter supports up to 2 channels ofaudio, in PCM input formats. The on board bassmanagement enables the generation of a sub channel fromthe stereo PCM data.
A Graphic Equaliser function is provided, plus selectablehigh frequency equalisation to suit different speaker types.Independent volume control for each channel is provided.The WM8602 PWM controller is compatible with integratedswitching output stages available from a number of vendorsor alternatively may be used with a discrete output stageconfiguration and achieve similar levels of performance.A Dynamic Peak Compressor with programmable attackand decay times is included, which allows headroom fortone control, bass management and extra digital gain to beprovided, without clipping occurring.
A Synchroniser allows slaving to LRCLK, thus making theWM8602 independent of source MCLK frequency and jitter.The device is controlled via a 2/3 wire serial interface. Theinterface provides access to all features including channelselection, volume controls, mutes, de-emphasis and powermanagement facilities. The device is supplied in a 28-pinSSOP package.
WM8602 Data Sheet
