CS4525-CNZ Cirrus Logic Inc, CS4525-CNZ Datasheet - Page 46

• Manufacturer Part Number: CS4525-CNZ
• Description: IC AMP AUDIO PWR 30W QUAD 48QFN
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r
• Type: Class Dr

Specifications of CS4525-CNZ

• Output Type: 2-Channel (Stereo) or 4-Channel (Quad)
• Package / Case: 48-QFN
• 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
• Product: Class-D
• Output Power: 30 W
• Thd Plus Noise: 10 %
• Operating Supply Voltage: 2.5 V to 5 V
• Supply Current: 54 mA
• Maximum Power Dissipation: 180 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Audio - Load Impedance: 4 Ohms, 6 Ohms, 8 Ohms
• Audio Load Resistance: 8 Ohms, 4 Ohms
• Minimum Operating Temperature: 0 C
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.375 V
• Amplifier Class: D
• No. Of Channels: 4
• Supply Voltage Range: 8V To 18V
• Load Impedance: 4ohm
• Operating Temperature Range: 0°C To +70°C
• Amplifier Case Style: QFN
• No. Of Pins: 48
• Rohs Compliant: Yes
• 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
• Other names: 598-1264

46
6.1.8
gradual voltage ramp minimizes output transients while the DC blocking capacitor is charged and dis-
charged. The Popguard has no effect on the PWM_SIG outputs nor the auxiliary serial output.
PWM Popguard is disabled by default; to enable it, the RmpSpd[1:0] register must be set to any value
other than 11. PWM Popguard should only be used for has when the power outputs are configured for
stereo half-bridge with full-bridge sub per
VP supply through a 0.033 µF capacitor whenever PWM Popguard is enabled, as shown in
PWM Popguard’s output ramp time will vary depending on the voltage applied to VP and the value of the
RmpSpd[1:0] bits; typical ramp times are listed in
RmpSpeed[1:0] bits, and PWM Popguard is disabled by default.
Logic-Level PWM Outputs
The CS4525 has two configurable logic-level PWM outputs, PWM_SIG1 and PWM_SIG2. These outputs
can be used as either digital input to an external PWM amplifier such as the CS4412, or as an analog
input to a headphone amplifier or a line-out amplifier.
To eliminate power-up pops when used to supply an external PWM amplifier, the CS4525 implements the
same click-free start-up function on the PWM_SIG outputs as it does for its own powered PWM outputs.
This function can only be utilized if the PWM amplifier has an initial transition delay feature, such as the
CS4412A. To eliminate power-up and power-down pops when used to supply an analog output circuit,
the PWM_SIG outputs support a high-impedance state that is controlled by the HiZPSig bit in the
Referenced Control
RmpSpeed[1:0] ...................
PDnAll .................................
PDnOutX .............................
VP Voltage
12 V
15 V
18 V
+8V to +18V
Table 9. Typical Ramp Times for Various VP Voltages
Register Location
“Ramp Speed (RmpSpd[1:0])” on page 75
“Power Down (PDnAll)” on page 89
“Power Down PWM Power Output X (PDnOutX)” on page 88
RmpSpd[1:0] = 00
Figure 19. Popguard Connection Diagram
2.16 seconds
1.74 seconds
1.40 seconds
0.033 uF
CS4525
Section
OUT1
OUT2
OUT3
OUT4
RmpSpd[1:0] = 01
2.20 seconds
1.76 seconds
1.42 seconds
6.1.7.1. The RAMP_CAP pin must be connected to the
Typical Ramp Up Times
Table
bridge
bridge
bridge
Filter
Filter
Filter
Half-
Half-
Full-
9. All output channels are affected by the
RmpSpd[1:0] = 10
2.20 seconds
1.78 seconds
1.44 seconds
Left
Speaker
Right
Speaker
Subwoofer
RmpSpd[1:0] = 11
Instant (No Ramp)
Instant (No Ramp)
Instant (No Ramp)
Figure
CS4525
DS726PP2
19.