TDA8926 Datasheet, PDF (11/32 Pages) NXP Semiconductors – Power stage 2 x 50 W class-D audio amplifier

Philips Semiconductors
Power stage 2 × 50 W class-D audio
amplifier
Preliminary specification
TDA8926
13 AC CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Single-ended application; note 1
P_o
output power
THD
total harmonic distortion
G_v(cl)
η
closed-loop voltage gain
efficiency
Mono BTL application; note 5
P_o
output power
THD
total harmonic distortion
G_v(cl)
η
closed loop voltage gain
efficiency
R_L = 8 Ω; V_P = ±25 V
THD = 0.5%
THD = 10%
R_L = 8 Ω; V_P = ±30 V
THD = 0.5%
THD = 10%
R_L = 4 Ω; V_P = ±21 V
THD = 0.5%
THD = 10%
P_o = 1 W; note 3
f_i = 1 kHz
f_i = 10 kHz
P_o = 30 W; f_i = 1 kHz; note 4
R_L = 8 Ω; THD = 0.5%
R_L = 8 Ω; THD = 10%
P_o = 1 W; note 3
f_i = 1 kHz
f_i = 10 kHz
P_o = 30 W; f_i = 1 kHz; note 4
25⁽²⁾ 30
−
W
30⁽²⁾ 37
−
W
−
40
−
W
−
52
−
W
30⁽²⁾ 40
−
W
40⁽²⁾ 50
−
W
−
0.01 0.05 %
−
0.1 −
%
29
30
31
dB
−
94
−
%
70⁽²⁾ 80
−
W
80⁽²⁾ 100 −
W
−
0.01 0.05 %
−
0.1 −
%
35
36
37
dB
−
94
−
%
Notes
1. V_P = ±25 V; R_L = 8 Ω; f_i = 1 kHz; f_osc = 310 kHz; R_s = 0.1 Ω (series resistance of filter coil); T_amb = 25 °C; measured
in reference design (SE application) shown in Fig.7; unless otherwise specified.
2. Indirectly measured; based on R_ds(on) measurement.
3. Total Harmonic Distortion (THD) is measured in a bandwidth of 22 Hz to 22 kHz. When distortion is measured using
a low-order low-pass filter a significantly higher value will be found, due to the switching frequency outside the audio
band.
4. Efficiency for power stage; output power measured across the loudspeaker load.
5. V_P = ±21 V; R_L = 8 Ω; f_i = 1 kHz; f_osc = 310 kHz; R_s = 0.1 Ω (series resistance of filter coil); T_amb = 25 °C; measured
in reference design (BTL application) shown in Fig.7; unless otherwise specified.
2002 Oct 10
11