TDA8950
NXP Semiconductors
2 × 150 W class-D power amplifier
slope is directly related to the time-constant
of the RC network on the MODE pin
V
(V)
O
V
O(offset)(on)
Standby
Mute
On
V
O(offset)(mute)
0
0.8
2.2
3.0
4.2
5.5
V
(V)
MODE
coa021
Fig 8.
Behavior of mode selection pin MODE
12. Dynamic characteristics
12.1 Switching characteristics
Table 8.
Dynamic characteristics
VP = ±35 V; Tamb = 25 °C; unless otherwise specified.
Symbol Parameter
Internal oscillator
Conditions
Min
Typ
Max
Unit
fosc(typ)
typical oscillator
frequency
ROSC = 30.0 kΩ
325
250
345
-
365
450
kHz
kHz
fosc
oscillator frequency
External oscillator or frequency tracking
VOSC voltage on pin OSC
SGND + 4.5 SGND + 5
SGND + 6 V
Vtrip(OSC) trip voltage on pin
OSC
-
SGND + 2.5 -
V
[1]
ftrack
tracking frequency
250
-
450
kHz
[1] When using an external oscillator, the fosc(ext) frequency (500 kHz minimum, 900 kHz maximum) will result
in a PWM frequency ftrack (250 kHz minimum, 450 kHz maximum) due to the internal clock divider. See
Section 8.2.
TDA8950_1
© NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 — 9 September 2008
14 of 39
NXP [ NXP ]
