TDA8932T NXP Semiconductors, TDA8932T Datasheet - Page 9

Audio Amplifiers 2X15W BTL CLASS D AMP+VOLCTRL

TDA8932T

Manufacturer Part Number
TDA8932T
Description
Audio Amplifiers 2X15W BTL CLASS D AMP+VOLCTRL
Manufacturer
NXP Semiconductors
Datasheet

Specifications of TDA8932T

Product
Class-D
Output Power
50 W
Available Set Gain
36 dB
Common Mode Rejection Ratio (min)
56 dB
Thd Plus Noise
0.015 %
Operating Supply Voltage
22 V
Maximum Power Dissipation
5000 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Audio Load Resistance
8 Ohms
Dual Supply Voltage
+/- 11 V
Input Signal Type
Differential
Minimum Operating Temperature
- 40 C
Output Signal Type
Differential, Single
Supply Type
Single or Dual
Supply Voltage (max)
36 V
Supply Voltage (min)
10 V
Output Type
1-Channel Mono or 2-Channel Stereo
Package / Case
SOIC-32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
TDA8932T/N1,112

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NXP Semiconductors
TDA8932_2
Preliminary data sheet
8.4.1 Thermal Foldback (TF)
8.4.2 OverTemperature Protection (OTP)
8.4.3 OverCurrent Protection (OCP)
8.4 Protection
The following protection is included in the TDA8932:
The reaction of the device to the different fault conditions differs per protection.
If the junction temperature of the TDA8932 exceeds the threshold level (T
gain of the amplifier is decreased gradually to a level where the combination of dissipation
(P) and the thermal resistance from junction to ambient [R
temperature around the threshold level.
This means that the device will not completely switch off, but remains operational at lower
output power levels. Especially with music output signals this feature enables high peak
output power while still operating without any external heat sink other than the
printed-circuit board area.
If the junction temperature still increases due to external causes, the OTP shuts down the
amplifier completely.
If the junction temperature T
When the loudspeaker terminals are short-circuited or if one of the demodulated outputs
of the amplifier is short-circuited to one of the supply lines, this will be detected by the
OCP.
If the output current exceeds the maximum output current (I
be limited by the amplifier to 4 A while the amplifier outputs remain switching (the amplifier
is not shut down completely). This is called current limiting.
The amplifier can distinguish between an impedance drop of the loudspeaker and a
low-ohmic short-circuit across the load or to one of the supply lines. This impedance
threshold depends on the supply voltage used:
Thermal Foldback (TF)
OverTemperature Protection (OTP)
OverCurrent Protection (OCP)
Window Protection (WP)
Supply voltage protection:
– UnderVoltage Protection (UVP)
– OverVoltage Protection (OVP)
– UnBalance Protection (UBP)
ESD
In case of a short-circuit across the load, the audio amplifier is switched off completely
and after approximately 100 ms it will try to restart again. If the short-circuit condition
is still present after this time, this cycle will be repeated. The average dissipation will
be low because of this low duty cycle.
Rev. 02 — 12 December 2006
j
> 155 C, then the power stage will shut down immediately.
th(j-a)
O(ocp)
] results in a junction
Class-D audio amplifier
> 4 A), this current will
TDA8932
© NXP B.V. 2006. All rights reserved.
j
> 140 C) the
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