TDA8927 Datasheet, PDF (14/36 Pages) NXP Semiconductors – Power stage 2 x 80 W class-D audio amplifier

Philips Semiconductors
Power stage 2 × 80 W class-D
audio amplifier
Objective specification
TDA8927
14 SWITCHING CHARACTERISTICS
V_P = ±25 V; T_amb = 25 °C; measured in Fig.8; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
PWM outputs (pins OUT1 and OUT2); see Fig.7
t_r
t_f
t_blank
t_PD
t_W(min)
R_ds(on)
rise time
fall time
blanking time
propagation delay
minimum pulse width
on-resistance of the output
transistors
from pin SW to pin PWM
note 1
MIN. TYP. MAX. UNIT
−
30
−
ns
−
30
−
ns
−
70
−
ns
−
20
−
ns
−
220 270 ns
−
0.2 0.3 Ω
Note
1. When used in combination with the TDA8929T controller, the effective minimum pulse width during clipping is
0.5t_W(min).
14.1 Duty factor
For the practical useable minimum and maximum duty factor (δ) which determines the maximum output power:
-t-^W-----⁽--^m---ⁱ-ⁿ--2-⁾---^×-----f--^o--^s--^c-
× 100% < δ <


1
–
t--_{W-----(-m----i-n--2)---}×_{-----f--o---s--c-}
× 100%
Using the typical values: 3.5% < δ < 96.5%.
2001 Dec 11
14