CRD4525-Q1 Cirrus Logic Inc, CRD4525-Q1 Datasheet - Page 47

• 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
6.1.8.1
Amplifier
6.1.8.2
Amplifier
1. Engage the reset/power-down feature of the external PWM amplifier.
2. Set the PDnAll bit in the Power Ctrl register to stop the PWM modulators if it is not already set.
3. Configure the PWM_SIG outputs as desired via the PWMDSel[1:0] bits in the Output Cfg register.
4. Set the HiZPSig bit in the EQ Config register to activate the PWM_SIG output drivers.
5. Disengage the reset/power-down feature of the external PWM amplifier if it has an initial transition
WARNING:Releasing the external amplifier from reset/power-down before PWM modulators have started
6. Clear the PDnAll bit in the Power Ctrl register to start the PWM modulators.
7. Disengage the reset/power-down feature of the external PWM amplifier if it has not been yet disen-
1. Mute the PWM_SIG outputs to a 50% duty-cycle by either setting Master Volume to 1111 1111h
2. Engage the reset/power-down feature of the external PWM amplifier.
3. Set the PDnAll bit in the Power Ctrl register to disable the PWM modulators and set the PWM_SIG
4. Power down the remainder of the system (if applicable).
delay feature, such as the CS4412A.
will cause a DC output on the speakers unless the external amplifier has an initial transition delay fea-
ture.
gaged.
(Master Mute) or through use of the HP_DETECT/MUTE input pin as described in the
Detection & Hardware Mute Input
outputs to a drive a logic ‘0’.
Recommended PWM_SIG Power-Up Sequence for an External PWM
Recommended PWM_SIG Power-Down Sequence for an External PWM
section on
page
51.
Headphone
CS4525
47