tda8933t-n1 NXP Semiconductors, tda8933t-n1 Datasheet - Page 11

• Manufacturer Part Number: tda8933t-n1
• Description: Tda8933 Class-d Audio Amplifier
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8933_1
Preliminary data sheet
If the supply voltage exceeds 36 V, the OVP circuit is activated and the power stages will
shut down. It is re-enabled as soon as the supply voltage drops below the threshold level.
The system is restarted again after 100 ms.
It should be noted that supply voltages > 40 V may damage the TDA8933. Two conditions
should be distinguished:
An additional UBP circuit compares the positive analog supply voltage (V
negative analog supply voltage (V
them exceeds a certain level. This level depends on the sum of both supply voltages. The
unbalance threshold levels can be defined as follows:
In a symmetrical supply the UBP is released when the unbalance of the supply voltage is
within 6 % of its starting value.
Table 6
Table 6.
Protection
OTP
OCP
WP
UVP
OVP
UBP
•
•
•
•
If the supply voltage is pumped to higher values by the TDA8933 application itself
(see also
supply voltage will decrease and the TDA8933 is protected against any overstress.
If a supply voltage > 40 V is caused by other or external causes, the TDA8933 will
shut down, but the device can still be damaged since the supply voltage will remain
> 40 V in this case. The OVP protection is not a supply clamp.
LOW-level threshold: V
HIGH-level threshold: V
shows an overview of all protections and the effect on the output signal.
Overview of protections for the TDA8933
Section
14.8), the OVP is triggered and the TDA8933 is shut down. The
Rev. 01 — 15 May 2007
Restart
When fault is removed
no
yes
yes
no
no
no
P(th)(ubp)l
P(th)(ubp)h
SSA
< 8/5
> 8/3
) and is triggered if the voltage difference between
V
V
HVPREF
HVPREF
Every 100 ms
yes
no
no
yes
yes
yes
Class-D audio amplifier
TDA8933
© NXP B.V. 2007. All rights reserved.
DDA
) and the
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