CS4525-CNZ Cirrus Logic Inc, CS4525-CNZ Datasheet - Page 60

• 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

60
6.4.2
Full-Bridge Output Filter (Stereo or Parallel)
Figure 27
(snubber circuit) is comprised of a capacitor (680 pF) and a resistor (5.6 Ω, 1/8 W) on each output pin and
should be placed as close as possible to the corresponding PWM output pins to greatly reduce radiated
EMI. The inductors, L1, and capacitor, C1, comprise the low-pass filter. Along with the nominal load im-
pedance of the speaker, these values set the cutoff frequency of the filter.
values based on nominal speaker (load) impedance for a corner frequency (-3 dB point) of approximately
35 kHz.
shows the output filter for a full-bridge configuration. The transient-voltage suppression circuit
OUTX+
OUTX-
Table 20. Low-Pass Filter Components - Full-Bridge
Load
4 Ω
6 Ω
8 Ω
680 pF
680 pF
5.6 Ω
5.6 Ω
Figure 27. Output Filter - Full-Bridge
VP
VP
*Diode is Rohm
RB160M-30 or
equivalent
L1, L2
10 µH
15 µH
22 µH
L1
L2
C1
0.47 µF
0.47 µF
1.0 µF
C1
Table 20
shows the component
CS4525
DS726PP2