CRD-4412A Cirrus Logic Inc, CRD-4412A Datasheet - Page 5

• Manufacturer Part Number: CRD-4412A
• Description: Audio Modules & Development Tools EvalBd 30W Qd Hlf- Brdg Dig Amp Pwr Stg
• Manufacturer: Cirrus Logic Inc

Specifications of CRD-4412A

• Description/function: Audio Amplifiers
• Operating Supply Voltage: 18 V
• Product: Audio Modules
• For Use With/related Products: CS4412A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS786RD1
2. OPERATING INSTRUCTIONS
2.1
2.2
The CRD4412A is designed to connect directly to the CRD4525 digital power amplifier reference design and
to interface with external signal sources. See the following sections for operation details with and without a
CRD4525.
Note that the CRD4412A and CRD4525 must be connected and disconnected from one another while pow-
er is not applied to the CRD4525.
Operation with CRD4525
When the CRD4412A is attached to a CRD4525 via the CRD4412A interface header and the CRD4525
FlexGUI is launched, the CS4525 is automatically configured to enable its bass manager and route the sub-
woofer channel to the CRD4412A. The CRD4412A amplifies the subwoofer signal in mono parallel full-
bridge mode. Together, the CRD4412A and CRD4525 implement a 2.1 configuration.
To operate the CRD4412A and CRD4525 in this configuration:
1. Download and install the FlexGUI software from www.cirrus.com/msasoftware.
2. Connect the CRD4412A to the CRD4525 via the CRD4412A interface header.
3. Connect the CRD4525 to a host PC using the supplied USB cable.
4. Connect the 8 Ω stereo speakers to the speaker terminals on the CRD4525.
5. Wire the two red-terminal speaker outputs together on the CRD4412A as shown in
6. Wire the two black-terminal speaker output together on the CRD4412A as shown in
7. Connect the 4 Ω mono subwoofer between the red and black speaker terminals on the CRD4412A.
8. Place a shunt across pins 2 and 3 of J1 to select mono mode.
9. Place a shunt across pins 1 and 2 of J4 to route the CS4412A thermal warning signal to the CS4525
10. Connect an input source to the S/PDIF or analog input connectors.
11. Plug the input to the +18 V power supply (included with the CRD4525) into an available power outlet.
12. Plug the output of the +18 V power supply into the power input connector on the CRD4525.
13. Launch the FlexGUI software and select the CRD4525 + CRD4412A combination from the board se-
14. Un-check the “Power Down CS4525” check box to power-up the CS4525. In this state, the CRD4525
Stand-Alone Operation
The CRD4412A may be operated alone, without a connected CRD4525. In this mode of operation, all sig-
nals and power are supplied to the CRD4412A through the CRD4412A interface header.
To operate the CRD4412A in this configuration:
1. Connect ground to one of these pins: 7, 9, 11, 13, 15, or 16 of J2.
2. Connect a +3.3 V source to pin 2 of J2, but do not apply power.
3. Connect a +8 V to +18 V source to one of these pins: 17, 18, 19, or 20 of J2, but do not apply power.
4. Connect a reset input signal to pin 14 of J2 and drive it low.
5. Connect logic-level PWM input signals to pins 8 and 10 of J2. For mono mode, it is only necessary to
WARNING: Pins 8 and 10 of J2, the PWM input signals, must never be left floating.
6. Place a shunt across 2 pins of J1 to select stereo or mono mode as desired.
7. Connect the outputs and speaker load as discussed in
8. Apply +3.3 V and +8 V to +18 V power.
external thermal warning input.
lection list if necessary. The GUI will load and be displayed.
and CRD4412A will convert and amplify the content present on the optical S/PDIF input.
connect a PWM input signal to pin 10 of J2; pin 8 can be grounded.
Section 1.5 on page
4.
Figure
Figure
CRD4412A
2.
2.
5