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4 x 50 Watt power amplifier and multiple voltage regulator
4 x 50 Watt power amplifier and multiple voltage regulator
FEATURES
- I2C-bus control
- Can drive a 2 Ω load with a battery voltage of up to 16 V and a 4 Ω load with a battery voltage of up to 18 V
- DC load detection, open, short and present
- AC load (tweeter) detection
- Programmable clip detect; 1 % or 4 %
- Programmable thermal protection pre-warning
- Independent short-circuit protection per channel
- Low gain line driver mode (20 dB)
- Loss-of-ground and open VP safe
- All outputs protected from short-circuit to ground, to VP or across the load
- All pins protected from short-circuit to ground
- Soft thermal-clipping to prevent audio holes
- Low battery detection.
- Voltage regulators
PROTECTION
- If connection to the battery voltage is reversed, all regulator voltages will be zero
- Able to withstand voltages at the output of up to 18 V (supply line may be short-circuited)
- Thermal protection to avoid thermal breakdown
- Load-dump protection
- Regulator outputs protected from DC short-circuit to ground or to supply voltage
- All regulators protected by foldback current limiting
- Power switches protected from loss-of-ground.
APPLICATIONS
- Boost amplifier and voltage regulator for car radios and CD/MD players.
GENERAL DESCRIPTION
Amplifiers The TDA8588 has a complementary quad audio power amplifier that uses BCDMOS technology. It contains four amplifiers configured in Bridge Tied Load (BTL) to drive speakers for front and rear left and right channels. The I2C-bus allows diagnostic information of each amplifier and its speaker to be read separately. Both front and both rear channel amplifiers can be configured independently in line driver mode with a gain of 20 dB (differential output).
Voltage regulators
- The TDA8588 has a multiple output voltage regulator with two power switches. The voltage regulator contains the following:
- Four switchable regulators and one permanently active regulator (microcontroller supply)
- Two power switches with loss-of-ground protection
- A reset output that can be used to communicate with a microcontroller.
- The quiescent current has a very low level of 150 µA with only regulator 2 active.
Circuit Diagram:
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| Application circuit 4 x 50 Watt power amplifier and multiple voltage regulator |
Bottom of printed-circuit board layout of test and application circuit showing components viewed from
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| Bottom of printed-circuit board layout of test and application circuit showing copper layer viewed from top |
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| Top of printed-circuit board layout of test and application circuit showing components viewed from top |
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| Bottom of printed-circuit board layout of test and application circuit showing copper layer viewed from top |
ReplyDeletehello, what is the voltage required to turn the amplifier on pin 22 ??