CDB44800 Cirrus Logic Inc, CDB44800 Datasheet - Page 23

• Manufacturer Part Number: CDB44800
• Description: BOARD EVAL FOR CS44800 PWM CTRL
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r

Specifications of CDB44800

• Amplifier Type: Class D
• Output Type: 8-Channel
• Voltage - Supply: 20 V ~ 50 V
• Operating Temperature: -10°C ~ 70°C
• Board Type: Fully Populated
• Utilized Ic / Part: CS44800
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS44800
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Max Output Power X Channels @ Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1532; CDB-44800

DS632F1
4. APPLICATIONS
4.1
4.2
Core Features
Clocking
Digital Audio Playback
Overview
The CS44800 is a multi-channel digital-to-PWM Class D audio system controller including interpolation,
sample rate conversion, half- and full-bridge PWM driver outputs, and power supply rejection feedback in a
64-pin LQFP package. The architecture uses a direct-to-digital approach that maintains digital signal integ-
rity to the final output filter, minimizing analog interference effects which negatively affect system perfor-
mance.
The CS44800 integrates on-chip sample rate conversion, digital volume control, peak detect with volume
limiter, de-emphasis, programmable interrupt conditions, and the ability to change the PWM switch rate to
eliminate AM frequency interference. The CS44800 also has a programmable load compensation filter,
which allows the speaker load to vary while the output filter remains fixed, maintaining a flat frequency re-
sponse. For single-ended half-bridge applications PWM Popguard
and realtime power supply feedback reduces noise coupling from the power supply. The PWM amplifier can
achieve greater than 90% efficiency. This efficiency provides for a smaller device package, less heat sink
requirements, and smaller power supplies.
The CS44800 is ideal for audio systems requiring wide dynamic range, negligible distortion, and low noise
such as A/V receivers, DVD receivers, digital speaker, and automotive audio systems.
Feature Set Summary
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2.5 V digital core voltage, VD.
VLC voltage pin for host interface logic levels between 2.5 V and 5.0 V.
VLS voltage pin for digital audio interface logic levels between 2.5 V and 5.0 V.
VDP voltage pin for PWM backend interface logic levels between 3.3 V and 5.0 V.
VDX voltage pin for clock input signals between 2.5 V and 5.0 V.
Minimum of 128Fs DAI_MCLK for DAI serial interface.
DAI interface uses automatic detection of LRCK/MCLK ratio to configure internal DAI/SRC clocks.
All PWM Processing clocks generated internally via:
Programmable divide of XTI by 1, 2, 4, 8 for SYS_CLK output.
Programmable divide of XTI by 32, 64, 128, 256 for PS_SYNC (power supply synchronization signal).
Supports 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz and 192 kHz sample frequencies.
High performance sample rate converter.
16, 20 and 24 bit audio sample lengths.
De-emphasis for 32 kHz, 44.1 kHz, 48 kHz.
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An external crystal - 24.576 MHz to 54 MHz, or
XTI input pin capable of supporting a clock signal at the VDX voltage level.
®
reduces the transient pops and clicks
CS44800
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