Datasheet

TPA3121D2
SLOS537A –MAY 2008–REVISED AUGUST 2010 www.ti.com
DC CHARACTERISTICS
T
A
= 25°C, V
CC
= 24 V, R
L
=8Ω (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Class-D output offset voltage
| V
OS
| (measured differentially in BTL V
I
= 0 V, A
V
= 36 dB 7.5 50 mV
mode as shown in Figure 36)
V
(BYPASS)
Bypass output voltage No load AVCC/8 V
I
CC(q)
Quiescent supply current SD = 2 V, MUTE = 0 V, no load 16 30 mA
I
CC(q)
Quiescent supply current in
MUTE = 0.8 V, no load 16 mA
mute mode
I
CC(q)
Quiescent supply current in
SD = 0.8 V, no load 0.39 1 mA
shutdown mode
r
DS(on)
Drain-source on-state 450
210 mΩ
resistance
GAIN0 = 0.8 V 18 20 22
GAIN1 = 0.8 V
GAIN0 = 2 V 24 26 28
G Gain dB
GAIN0 = 0.8 V 30 32 34
GAIN = 2 V
GAIN0 = 2 V 34 36 38
Mute attenuation V
I
= 1 Vrms -75 dB
AC CHARACTERISTICS
T
A
= 25°C, V
CC
= 24 V, R
L
= 8Ω (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
CC
= 24, V
ripple
= 200 mV
PP
100 Hz –48
ksvr Supply ripple rejection dB
Gain = 20 dB
1 kHz –52
Output power at 1% THD+N V
CC
= 24 V, f = 1 kHz 8
P
O
W
Output power at 10% THD+N V
CC
= 24 V, f = 1 kHz 10
Total harmonic distortion + f = 1 kHz, P
O
= 5 W 0.04%
THD+N
noise
125 mV
20 Hz to 22 kHz, A-weighted filter,
V
n
Output integrated noise floor
Gain = 20 dB
–78 dBV
Crosstalk P
O
= 1 W, f = 1 kHz; gain = 20 dB –70 dB
Max output at THD+N < 1%, f = 1 kHz,
SNR Signal-to-noise ratio 92 dB
gain = 20 dB
Thermal trip point 150 °C
Thermal hysteresis 30 °C
f
OSC
Oscillator frequency 250 300 350 kHz
Δt mute Mute delay Time from mute input switches high until 120 msec
outputs muted
Δt unmute Unmute delay Time from mute input switches low until 120 msec
outputs unmuted
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