MAX13301 Datasheet, PDF (4/37 Pages) Maxim Integrated Products – 4-Channel, Automotive Class D Audio Amplifier Feedback After the Filter

4-Channel, Automotive Class D Audio Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VPVDD = 14.4V, VDD = VDD5 = 5V, VGND = VPGND = 0V, fSW = 500kHz, MAP.COMP[2:0] = (see Table 20 for applicable setting),
TA = -40NC to +125NC; typical values are at TA = +25NC, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
Total Harmonic Distortion Plus
Noise
THD+N
POUT = 10W, RL = 4I, BW = 22Hz to
20kHz AES17 filter, f = 1kHz
POUT = 1W to 10W, RL = 4I, BW = 22Hz
to 20kHz AES17 filter, f = 1kHz
0.04 0.14
%
0.1
Noise
Crosstalk
A-weighted, VPVDD = 24V
N
22Hz to 22kHz, VPVDD = 24V
A-weighted, CTRL5.SS[2:0] = 110,
SSEN = 1, VPVDD = 24V
POUT_ = 4W, f = 1kHz to 10kHz
100
140
FVRMS
100
60
dB
Efficiency
RL = 4I, POUT = 20W/channel, VDD5,
E
VDD supplied from a switching power
supply
88
%
Internal Switching Frequency
Adjust Range
6 to 15 clock-divider range
300
750
kHz
ONE-TIME DIAGNOSTICS
Short-to-Ground Detection
CTRL2.STBY = 0, CTRL3.SDET = 1
75
I
Short-to-PVDD Detection
Threshold
CTRL2.STBY = 1, CTRL3.SDET = 1
6
V
Open-Load Detection
Low-Current Threshold
CTRL3.LDM = 1, power amplifier mode
CTRL3.LDM = 0, line-driver mode
15kHz < f < 25kHz, _{CTRL3.HCL = 0}
TA = +25NC,
CTRL3.TW = 1
CTRL3.HCL = 1
70
100
I
200
300
160
291
500
mA
200
364
625
High-Current Threshold
CONTINUOUS DIAGNOSTICS
Differential Output Offset Voltage
Threshold
f < 20Hz,
CTRL3.TW = 0
CTRL3.HCL = 0
CTRL3.HCL = 1
No audio in play mode
0.65
1.15
1.85
A
0.9
1.65 2.15
0.56
1.04
1.6
V
CTRL1.CLVL[1:0]
= 11
1
Clip-Detect Threshold
RL = 4I
CTRL1.CLVL[1:0]
= 01
CTRL1.CLVL[1:0]
= 10
3
%THDN
5
CTRL1.CLVL[1:0]
= 00
10
4