CS4525-CNZR Cirrus Logic Inc, CS4525-CNZR Datasheet - Page 37

• Manufacturer Part Number: CS4525-CNZR
• Description: IC PWM Controller+power Stage
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r
• Type: Class Dr

Specifications of CS4525-CNZR

• Output Type: 2-Channel (Stereo) or 4-Channel (Quad)
• Max Output Power X Channels @ Load: 30W x 1 @ 4 Ohm; 15W x 2 @ 8 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: ADC, Depop, I²C, I²S, Mute, PWM, Short-Circuit and Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 48-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1586 - REFERENCE BOARD FOR CS4525 PWM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS726PP3
6.1.4.10 Peak Signal Limiter
When enabled, the limiter monitors the digital output following the volume control block, detects when
peak levels exceed a selectable maximum threshold level and lowers the volume at a programmable at-
tack rate until the signal peaks fall below the maximum threshold. When the signal level falls below a se-
lectable minimum threshold, the volume returns to its original level (as determined by the individual and
master volume control registers) at a programmable release rate. Attack and release rates are affected
by the soft ramp/zero cross settings and sample rate, Fs.
Recommended settings: Best limiting performance may be realized with the fastest attack and slowest
release setting with soft ramp enabled in the control registers. Use the “minimum” bits to set a threshold
slightly below the maximum threshold to cushion the sound as the limiter attacks and releases.
By default, the limiter affects all channels when the maximum threshold is exceeded on any single chan-
nel. This default functionality is designed to keep all output channels at the same volume level while the
limiter is in use. This behavior can be disabled by clearing the LimitAll bit in the Limiter Cfg 1 register.
(after Limiter)
Max[2:0]
Limiter
Output
Input
Volume
Figure 17. Peak Signal Detection & Limiting
ARate[5:0]
Attack/Release Sound
Attack/Release Sound
Cushion
Cushion
Min[2:0]
RRate[5:0]
CS4525
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