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PDF WM8602 Data sheet ( Hoja de datos )
| Número de pieza | WM8602 | |
| Descripción | 2.1 CHANNEL PWM CONTROLLER | |
| Fabricantes | Wolfson Microelectronics plc | |
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2.1 Channel PWM Controller
WM8602
DESCRIPTION
The WM8602 comprises a high performance stereo + sub
PWM digital power amplifier controller. Simply by adding
appropriate power output stages a 2.1 channel power
amplifier may be built. Two identical full audio bandwidth
channels, plus a reduced bandwidth sub channel are
provided as PWM outputs.
The PCM to PWM converter supports up to 2 channels of
audio, in PCM input formats. The on board bass
management enables the generation of a sub channel from
the stereo PCM data.
A Graphic Equaliser function is provided, plus selectable
high frequency equalisation to suit different speaker types.
Independent volume control for each channel is provided.
The WM8602 PWM controller is compatible with integrated
switching output stages available from a number of vendors
or alternatively may be used with a discrete output stage
configuration and achieve similar levels of performance.
A Dynamic Peak Compressor with programmable attack
and decay times is included, which allows headroom for
tone control, bass management and extra digital gain to be
provided, without clipping occurring.
A Synchroniser allows slaving to LRCLK, thus making the
WM8602 independent of source MCLK frequency and jitter.
The device is controlled via a 2/3 wire serial interface. The
interface provides access to all features including channel
selection, volume controls, mutes, de-emphasis and power
management facilities. The device is supplied in a 28-pin
SSOP package.
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 different
speakers
• Volume control on each channel +24dB to -103.5dB in
0.5dB steps, with volume ramping and auto-mute
functions
• Programmable Dynamic Peak Compressor avoids clipping
even at high volume settings
• Internal PLL and optional crystal oscillator, supporting
Audio 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 outputs
APPLICATIONS
• Hi-Fi systems
• Automotive Audio
• Boombox
• Active Speakers
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, May 2004, Rev 1.5
Copyright 2004 Wolfson Microelectronics plc
1 page  
Product Preview
WM8602
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at
or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical
Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible
to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
MIN
Analogue supply voltage (AVDD)
-0.3V
Digital supply voltage (DVDD)
-0.3V
PWM output buffer supply voltage (BVDD)
-0.3V
Voltage range inputs
DGND -0.3V
Master Clock Frequency
10MHz
Operating temperature range, TA
Storage temperature
-20°C
-65°C
Notes:
1. GND power supplies (i.e. AGND, DGND, and BGND) must always be within 0.3V of each other.
2. VDD power supplies (i.e. AVDD, DVDD, and BVDD) must always be within 0.3V of each other.
MAX
+5V
+5V
+5V
DVDD +0.3V
50MHz
+85°C
+150°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Analogue supply range
Digital supply range
PWM output buffer supply
Ground
SYMBOL
AVDD
DVDD
BVDD
AGND, DGND, BGND
TEST CONDITIONS
MIN
2.7
2.7
2.7
TYP
0
MAX
3.6
3.6
3.6
UNIT
V
V
V
V
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PP Rev 1.5 May 2004
5
5 Page 
Product Preview
CONTROL INTERFACE TIMING – 3-WIRE MODE
WM8602
CSB
SCLK
tCSL
tSCY
tSCH
tSCL
tCSH
tSCS
tCSS
SDIN
tDSU
tDHO
LSB
Figure 4 Control Interface Timing – 3-Wire Serial Control Mode
Test Conditions
AVDD, DVDD, BVDD = 3.3V, AGND, DGND, BGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 256fs, 24-bit data,
unless otherwise stated.
PARAMETER
Program Register Input Information
SCLK rising edge to CSB rising edge
SCLK pulse cycle time
SCLK pulse width low
SCLK pulse width high
SDIN to SCLK set-up time
SCLK to SDIN hold time
CSB pulse width low
CSB pulse width high
CSB rising to SCLK rising
Pulse width of spikes that will be suppressed
SYMBOL
tSCS
tSCY
tSCL
tSCH
tDSU
tDHO
tCSL
tCSH
tCSS
tps
MIN TYP MAX UNIT
60 ns
80 ns
30 ns
30 ns
20 ns
20 ns
20 ns
20 ns
20 ns
2 8 ns
Table 6 Control Interface Timing – 3-Wire Serial Control Mode
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PP Rev 1.5 May 2004
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8602.PDF ] | |
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