TDA8924 Datasheet, PDF (13/35 Pages) NXP Semiconductors – 2 x 120 W class-D power amplifier

Philips Semiconductors
2 × 120 W class-D power amplifier
Objective specification
TDA8924
14 DYNAMIC AC CHARACTERISTICS (STEREO AND DUAL SE APPLICATION)
V_P = ±24 V; R_L = 2 Ω; f_i = 1 kHz; f_osc = 310 kHz; R_sL < 0.1 Ω (note 1); T_amb = 25 °C; measured in Fig.9; unless
otherwise specified.
SYMBOL
PARAMETER
P_o
output power
THD
total harmonic distortion
G_v(cl)
η
SVRR
closed loop voltage gain
efficiency
supply voltage ripple
rejection
Z_i
V_n(o)
input impedance
noise output voltage
α_cs
∆G_v
V_o(mute)
CMRR
channel separation
channel unbalance
output signal in mute
common mode rejection
ratio
CONDITIONS
MIN. TYP. MAX. UNIT
R_L = 4 Ω; V_P = ±27 V; THD = 0.5 %; note 2 −
R_L = 4 Ω; V_P = ±27 V; THD = 10 %; note 2 −
R_L = 3 Ω; V_P = ±27 V; THD = 0.5 %; note 2 −
R_L = 3 Ω; V_P = ±27 V; THD = 10 %; note 2 −
R_L = 2 Ω; V_P = ±24 V; THD = 0.5 %; note 2 −
R_L = 2 Ω; V_P = ±24 V; THD = 10 %; note 2 −
P_o = 1 W; note 3
f_i = 1 kHz
−
f_i = 10 kHz
−
−
P_o = 125 W; note 4
−
operating; f_i = 100 Hz; note 5
−
operating; f_i = 1 kHz; note 6
40
mute; f_i = 100 Hz; note 5
−
standby; f_i = 100 Hz; note 5
−
45
operating; R_s = 0 Ω; note 7
−
operating; R_s = 10 kΩ; note 8
−
mute; note 9
−
note 10
−
70 −
W
90 −
W
93 −
W
115 −
W
95 −
W
120 −
W
0.05 −
%
0.07 −
%
28 −
dB
83 −
%
55 −
dB
50 −
dB
55 −
dB
80 −
dB
68 −
kΩ
200 400 µV
230 −
µV
220 −
µV
70 −
dB
−
−
1
dB
note 11
V_i(CM) = 1 V (RMS)
−
−
400 µV
−
75 −
dB
Notes
1. R_sL = series resistance of inductor of low-pass LC filter in the application.
2. Output power is measured indirectly; based on R_DSon measurement.
3. Total harmonic distortion is measured in a bandwidth of 22 Hz to 22 kHz. When distortion is measured using a lower
order low-pass filter a significantly higher value is found, due to the switching frequency outside the audio band.
Maximum limit is guaranteed but may not be 100 % tested.
4. Output power measured across the loudspeaker load.
5. V_ripple = V_ripple(max) = 2 V (p-p); f_i = 100 Hz; R_s = 0 Ω.
6. V_ripple = V_ripple(max) = 2 V (p-p); f_i = 1 kHz; R_s = 0 Ω.
7. B = 22 Hz to 22 kHz; R_s = 0 Ω; maximum limit is guaranteed but may not be 100 % tested.
8. B = 22 Hz to 22 kHz; R_s = 10 kΩ.
9. B = 22 Hz to 22 kHz; independent of R_s.
10. P_o = 1 W; R_s = 0 Ω; f_i = 1 kHz.
11. V_i = V_i(max) = 1 V (RMS); maximum limit is guaranteed but may not be 100 % tested.
2003 Jul 28
13