CRD4525-Q1 Cirrus Logic Inc, CRD4525-Q1 Datasheet - Page 41

• Manufacturer Part Number: CRD4525-Q1
• Description: REFERENCE BOARD FOR CS4525 PWM
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r

Specifications of CRD4525-Q1

• Amplifier Type: Class D
• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 15W x 2 @ 8 Ohm
• Voltage - Supply: 12 V ~ 18 V
• Operating Temperature: 0°C ~ 70°C
• Board Type: Fully Populated
• Utilized Ic / Part: CS4525
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1586

DS726PP3
The AttackDly[1:0] bits in the Foldback Cfg register allow the foldback attack delay timeout period to be
adjusted from approximately 0.5 seconds to approximately 2.0 seconds. The maximum attenuation ap-
plied by the thermal foldback algorithm can be restricted to -30 dB by setting the EnFloor bit in the same
register.
The foldback adjustment lock feature causes the attenuation applied by the foldback algorithm to be main-
tained after the foldback condition has subsided. The applied attenuation will continue to be applied until
the master volume or all active channel volume controls are lowered below the foldback attenuation level,
or until a subsequent foldback condition occurs causing the applied attenuation to be lowered further. If
the foldback algorithm applies attenuation while this feature is enabled, when the feature is subsequently
disabled, the applied attenuation will be gradually released as long as the temperature remains within the
safe operating range. This foldback lock adjustment feature is enabled by the LockAdj bit in the
Foldback Cfg register.
Thermal warnings will only affect the foldback algorithm and cause attenuation to be applied when en-
abled by the EnTherm bit in the Foldback Cfg register.
The CS4525 can be configured to accept an external thermal warning indicator input. When in this con-
figuration, an active input signal indicates that a thermal warning threshold has been exceeded. If thermal
foldback is enabled, the foldback algorithm will respond as described above making no distinction be-
tween an internal or external thermal warning condition. See
more information.
Referenced Control
EnTherm .............................
AttackDly[1:0] ......................
EnFloor................................
LockAdj ...............................
Register Location
“Enable Thermal Foldback (EnTherm)” on page 74
“Foldback Attack Delay (AttackDly[1:0])” on page 75
“Enable Foldback Floor (EnFloor)” on page 75
“Lock Foldback Adjust (LockAdj)” on page 74
“External Warning Input Port” on page 44
CS4525
for
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