TDA8924 Datasheet, PDF (26/35 Pages) NXP Semiconductors – 2 x 120 W class-D power amplifier

Philips Semiconductors
2 × 120 W class-D power amplifier
Objective specification
TDA8924
handbo_Io_q1k,²h⁰alfpage
(mA)
100
MDB554
80
60
40
20
0
0
10
20
30 _{VDD (V)} 40
R_L is open-circuit.
Fig.25 Quiescent current as a function of supply
voltage.
handboo³k,³h⁰alfpage
fclk
(kHz)
320
MDB555
310
300
290
0
5 10 15 20 25 30 35
VDD (V)
R_L is open-circuit.
Fig.26 Clock frequency as a function of supply
voltage.
0
handbook, halfpage
SVRR
(dB)
−20
MDB562
−40
(1)
−60
(2)
(3)
−80
−100
10
10²
10³
10⁴
10⁵
fi (Hz)
V_P = ±20 V; V_ripple = 2 V (p-p) with respect to ground.
(1) Both supply lines in phase.
(2) Both supply lines in anti-phase.
(3) One supply line rippled.
Fig.27 SVRR as a function of input frequency.
handbook, h⁰alfpage
SVRR
(dB)
−20
−40
−60
−80
MDB563
(1)
(2)
(3)
−100
0
1
2
3
4
5
Vripple(p-p)
V_P = ±20 V; V_ripple = 2 V (p-p) with respect to ground.
(1) f_ripple = 1 kHz.
(2) f_ripple = 100 Hz.
(3) f_ripple = 10 Hz.
Fig.28 SVRR as a function of V_ripple(p-p).
2003 Jul 28
26