TPA2013D1 2.7-W CONSTANT OUTPUT POWER CLASS-D AUDIO AMPLIFIER CIRCUIT

 

The TPA2013D1 is a high efficiency Class-D audio power amplifier with an integrated boost converter. It drives up to 2.7 W (10% THD+N) into a 4 Ω speaker. With 85% typical efficiency, the TPA2013D1 helps extend battery life when playing audio. The built-in boost converter generates the voltage rail for the Class-D amplifier. This provides a louder audio output than a stand-alone amplifier connected directly to the battery. It also maintains a consistent loudness, regardless of battery voltage. Additionally the boost converter can be used to supply external devices. The TPA2013D1 has an integrated low pass filter to improve RF rejection and reduce out-of-band noise, increasing the signal to noise ratio (SNR). A built-in
PLL synchronizes the boost converter and Class-D
switching frequencies, thus eliminating beat
frequencies and improving audio quality. All outputs
are fully protected against shorts to ground, power
supply, and output-to-output shorts.
TPA2013D1 DATASHEET

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LA47202P 47 W. 4 CH BTL Power Amplifier for Car Audio Systems

LA7202P 47W. 4CH BLOCK DIAGRAM

VCC max1 Without signal, t = 1 minute  26 V
VCC max2 When operating = 18 V
VCC = 14.4 V
RL = 4 Ω

The LA47202P is a 4-channel BTL power amplifier IC developed for use in car audio applications. The LA47202P adopts a pure complementary output stage circuit structure with a v-pnp transistor for the high side and an npn transistor for the low side to provide both high output power and high quality sound. The LA47202P integrates all the functions required for car audio applications on the same chip, including a standby switch, a muting function, and a full complement of protection circuits. It also features a self diagnostics function.
LA7202P DATASHEET

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LA4425A 5W. POWER AMPLIFIER WITH VERY FEW EXTERNAL PARTS FOR CAR RADIO AND CAR STEREO CIRCUIT

VCC max = 0 18 V
VCC = 13.2 V.
RL = 4 OHM
PO = 5 W.
fL =  40 Hz
fH = 90 kHz
Features

• The world’s first power amplifier with very few external
  parts.
• Almost no evaluation, adjustment and check of its functions
  as a power IC required
• Wide operation supply range ® 5 to 16V
• On-chip protection:
  Overvoltage protection
  Thermal protection
  Output D.C. short protection
• On-chip pop noise reducing circuit

LA4425A 5W. Printed Circuit Pattern

LA4425A DATASHEET

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