CS4525 datasheet(20/98 Pages) CIRRUS

20 / 98 page

DS726PP1

CS4525

PWM POWER OUTPUT CHARACTERISTICS

Test Conditions (unless otherwise specified): AGND = DGND = PGND = 0 V; All voltages with respect to ground;

TA = 25°C; VD = 3.3 V; VP = 18 V; RL = 8 Ω for full-bridge, RL = 4 Ω for half-bridge and parallel full-bridge;

OutputDly[3:0] = 1111; PhaseShift = 1 for half-bridge, PhaseShift = 0 for full-bridge and parallel full-bridge;

Input Signal: full-scale 997 Hz sine wave through serial audio input port, 48 kHz sample rate; Capacitor values

connected to AFILTA, AFILTB, FILT+, VQ, VD_REG, and VA_REG as shown in Figure 1 on page 13; PWM Switch

Rate = 384 kHz; 10 Hz to 20 kHz Measurement Bandwidth; Performance measurements taken through AES17 fil-

ter.

Parameters

Symbol

Conditions

Min

Typ

Max Units

Power Output per Channel

Stereo Full-Bridge

Half-Bridge

Parallel Full-Bridge

THD+N < 10%

THD+N < 1%

THD+N < 10%

THD+N < 1%

THD+N < 10%

THD+N < 1%

5.5

23.5

Total Harmonic Distortion + Noise

Stereo Full-Bridge

Half-Bridge

Parallel Full-Bridge

THD+N

PO = 1 W

PO = 0 dBFS = 11.3 W

PO = 1 W

PO = 0 dBFS = 5.0 W

PO = 1 W

PO = 0 dBFS = 22.6 W

0.05

0.10

0.12

0.28

0.1

0.3

Dynamic Range

Stereo Full-Bridge

Half-Bridge

Parallel Full-Bridge

DYR

PO = -60 dBFS, A-Weighted

PO = -60 dBFS, Unweighted

PO = -60 dBFS, A-Weighted

PO = -60 dBFS, Unweighted

PO = -60 dBFS, A-Weighted

PO = -60 dBFS, Unweighted

102

MOSFET On Resistance

RDS(ON)

Id = 0.5 A, TJ =50°C-

280

Efficiency

PO = 2 x 15 W, RL = 8 Ω

-85-

Minimum Output Pulse Width

PWmin

No Load

Rise Time of OUTx

Resistive Load

Fall Time of OUTx

Resistive Load

PWM Output Over-Current Error Trigger Point

ICE

TA = 25°C, OCREF = 16.2 kΩ

TA = 25°C, OCREF = 18 kΩ

TA = 25°C, OCREF = 22 kΩ

2.5

2.1

1.7

Junction Thermal Warning Trigger Point

TTW

-105

°C

Junction Thermal Error Trigger Point

TTE

-125

°C

VP Under-Voltage Error Falling Trigger Point

VUVFALL

TA = 25°C-

4.7

4.9

VP Under-Voltage Error Rising Trigger Point

VUVRISE

TA = 25°C

4.95

5.4

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