Philips Semiconductors
Preliminary specification
Power stage 2 × 50 W class-D audio
amplifier
TDA8926
MLD623
MLD624
10
50
handbook, halfpage
handbook, halfpage
P
o
THD+N
(%)
(W)
40
1
(1)
30
20
−1
10
(2)
(3)
−2
10
10
−3
10
0
100
100
200
300
400
500
f
600
(kHz)
200
300
400
500
f
600
(kHz)
clk
clk
VP = ±21 V; Po = 1 W in 2 × 8 Ω.
(1) 10 kHz.
(2) 1 kHz.
VP = ±21 V; RL = 2 × 8 Ω; fi = 1 kHz; THD + N = 10%.
(3) 100 Hz.
Fig.29 Total harmonic distortion plus noise as a
function of clock frequency.
Fig.30 Output power as a function of clock
frequency.
MLD625
MLD626
150
1000
handbook, halfpage
handbook, halfpage
I
V
q
r(PWM)
(mA)
120
(mV)
800
90
60
600
400
30
0
200
0
100
100
200
300
400
500
f
600
(kHz)
200
300
400
500
f
600
(kHz)
clk
clk
VP = ±25 V; RL = open-circuit.
VP = ±25 V; RL = 2 × 8 Ω.
Fig.31 Quiescent current as a function of clock
frequency.
Fig.32 PWM residual voltage as a function of clock
frequency.
2002 Oct 10
25
NXP [ NXP ]
