TDA8953 NXP Semiconductors, TDA8953 Datasheet - Page 13

• Manufacturer Part Number: TDA8953
• Description: The TDA8953 is a stereo or mono high-efficiency Class D audio power amplifier in a single IC featuring low power dissipation
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8953_1
Product data sheet
8.3.6 Overview of protection functions
8.4 Differential audio inputs
An overview of all protection circuits and their respective effects on the output signal is
provided in
Table 5.
[1]
[2]
[3]
[4]
The audio inputs are fully differential ensuring a high common mode rejection ratio and
maximum flexibility in the application.
Protection name Complete
TFB
OTP
OCP
WP
UVP
OVP
UBP
CP
•
•
Amplifier gain depends on the junction temperature.
The amplifier shuts down completely only if the short-circuit impedance is below the impedance threshold
(Z
Fault condition detected during any Standby-to-Mute transition or during a restart after OCP has been
activated (short-circuit to one of the supply lines).
As soon as the clock is present.
Stereo operation: to avoid supply pumping effects and to minimize peak currents in
the power supply, the output stages should be configured in anti-phase. To avoid
acoustical phase differences, the speakers should also be connected in anti-phase.
Mono BTL operation: the inputs must be connected in anti-parallel. The output of one
channel is inverted and the speaker load is connected between the two outputs of the
TDA8953. In practice (because of the OCP threshold) the maximum output power in
the BTL configuration can be boosted to twice the maximum output power available in
the single-ended configuration.
The input configuration for a mono BTL application is illustrated in
[1]
th
; see
Overview of TDA8953 protection circuits
Section
Table
5.
8.3.2). In all other cases, current limiting results in a clipped output signal.
shutdown
N
Y
Y
N
Y
Y
Y
Y
[2]
[3]
Rev. 01 — 24 December 2009
Restart directly
N
N
N
Y
N
N
N
N
[2]
2 × 210 W class-D power amplifier
Restart after
100 ms
N
Y
Y
N
Y
Y
Y
Y
[2]
[4]
TDA8953
Figure
© NXP B.V. 2009. All rights reserved.
PROT pin active
N
N
Y
N
N
N
N
N
10.
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