TDA8953 NXP Semiconductors, TDA8953 Datasheet - Page 12

• 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
8.3.4 Supply voltage protection
8.3.5 Clock protection (CP)
If the supply voltage drops below the minimum supply voltage threshold, V
circuit will be activated and the system will shut down. Once the supply voltage rises
above V
If the supply voltage exceeds the maximum supply voltage threshold, V
circuit will be activated and the power stages will be shut down. When the supply voltage
drops below V
An additional UnBalance Protection (UBP) circuit compares the positive analog supply
voltage (on pin VDDA) with the negative analog supply voltage (on pin VSSA) and is
triggered if the voltage difference exceeds a factor of two (V
2 × V
V
The clock signal can be provided by an external oscillator connected to pin OSC (see
Section
be switched off and will remain off until the clock signal has been restored.
th(ubp)
•
Start-up will be interrupted if a short-circuit is detected between one of the output
terminals and one of the supply pins. The TDA8953 will wait until the short-circuit to
the supply lines has been removed before resuming start-up. The short circuit will not
generate large currents because the short-circuit check is carried out before the
power stages are enabled.
When the amplifier is shut down completely because the OCP circuit has detected a
short circuit to one of the supply lines.
Section
lines has been removed.
WP will be activated when the amplifier attempts to restart after 100 ms (see
DDA
, the system restarts after 100 ms.
th(uvp)
14.4). When this signal is lost, or the clock frequency is too low, the amplifier will
). When the supply voltage difference drops below the unbalance threshold,
8.3.2). The amplifier will not start-up again until the short circuit to the supply
again, the system will restart after a delay of 100 ms.
th(ovp)
again, the system will restart after a delay of 100 ms.
Rev. 01 — 24 December 2009
2 × 210 W class-D power amplifier
DDA
> 2 × |V
TDA8953
© NXP B.V. 2009. All rights reserved.
th(ovp)
SSA
th(uvp)
| OR |V
, the OVP
, the UVP
SSA
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