TDA8922 Datasheet, PDF (26/36 Pages) NXP Semiconductors – 2 x 25 W class-D power amplifier

Philips Semiconductors
2 × 25 W class-D power amplifier
Objective specification
TDA8922
handbook¹, ⁰h⁰alfpage
Iq
(mA)
80
MGX338
60
40
20
0
0
5 10 15 20 25 30 35
VDD (V)
R_L = ∞.
Fig.26 Quiescent current as a function of supply
voltage.
handbook³, ²h⁰alfpage
fclk
(kHz)
310
MGX339
300
290
0
5 10 15 20 25 30 35
VDD (V)
R_L = ∞.
Fig.27 Clock frequency as a function of supply
voltage.
0
handbook, halfpage
SVRR
(dB)
− 20
− 40
− 60
MGX346
(1)
(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.28 SVRR as a function of input frequency.
0
handbook, halfpage
SVRR)
(dB)
− 20
− 40
− 60
− 80
MGX347
(1)
(2)
(3)
− 100
0
1
2
3
4
5
Vripple(p-p) (V)
V_P = ±20 V; V_ripple with respect to ground (in phase).
(1) f_ripple = 1 kHz.
(2) f_ripple = 100 Hz.
(3) f_ripple = 10 Hz.
Fig.29 SVRR as a function of V_ripple(p-p).
2003 Mar 20
26