tda8941p NXP Semiconductors, tda8941p Datasheet - Page 5

• Manufacturer Part Number: tda8941p
• Description: 1.5 W Mono Bridge Tied Load Btl Audio Amplifier
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 06864
Product specification
8.3.1 Switch-on and switch-off
8.3 Mode selection
8.4 Supply Voltage Ripple Rejection (SVRR)
Table 4:
For the average listening level a power dissipation of 0.6 W can be used for
calculation of the maximum ambient temperature.
The TDA8941P has three functional modes, which can be selected by applying the
proper DC voltage to pin MODE. See
which depend on the supply voltage level. The MODE pin can be driven by a 3-state
logic output stage: e.g. a microcontroller with additional components for DC-level
shifting.
Standby — In this mode the current consumption is very low and the outputs are
floating. The device is in standby mode when (V
the MODE pin is left floating (high impedance). The power consumption of the
TDA8941P will be reduced to <0.18 mW.
Mute — In this mode the amplifier is DC-biased but not operational (no audio output);
the DC level of the input and output pins remain on half the supply voltage. This
allows the input coupling and Supply Voltage Ripple Rejection (SVRR) capacitors to
be charged to avoid pop-noise. The device is in mute mode when
3 V < V
Operating — In this mode the amplifier is operating normally. The operating mode is
activated at V
To avoid audible plops during supply voltage switch-on or switch-off, the device is set
to standby mode before the supply voltage is applied (switch-on) or removed
(switch-off).
The switch-on and switch-off time can be influenced by an RC-circuit on the MODE
pin. Rapid on/off switching of the device or the MODE pin may cause ‘click- and
pop-noise’. This can be prevented by proper timing of the RC-circuit on the MODE
pin.
The SVRR is measured with an electrolytic capacitor of 10 F on pin SVR at a
bandwidth of 10 Hz to 80 kHz.
of the frequency. A larger capacitor value on the SVR pin improves the ripple rejection
behaviour at the lower frequencies.
Headroom
0 dB
12 dB
MODE
Power rating as function of headroom
< (V
MODE
CC
< 0.5 V.
Rev. 02 — 7 April 2000
Power output (THD = 1%)
P
P
1.5 V).
o
o(ALL)
= 1 W
= 63 mW
Figure 12 on page 11
Figure 4
and
CC
1.5 W mono BTL audio amplifier
5
illustrates the SVRR as function
Power dissipation (P)
1.15 W
0.6 W
0.5 V) < V
for the respective DC levels,
© Philips Electronics N.V. 2000. All rights reserved.
TDA8941P
MODE
< V
CC
, or when
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