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ANT8821
ANT8821 is an adaptive boost, ultra-low EMI, high signal-to-noise ratio, dual channel G-class audio amplifier. The chip integrates multiple power rail adaptive boost units internally. When powered by a 3.7V lithium battery, it can drive a dual channel 4 Ω load and output 2 × 4.5W constant power.
In addition, ANT8821 has built-in overcurrent protection and overheat protection functions, ensuring the reliability and stability of the chip in various application environments.
In addition, ANT8821 has built-in overcurrent protection and overheat protection functions, ensuring the reliability and stability of the chip in various application environments.
ANT8821 Description:
ANT8821 is an adaptive boost, ultra-low EMI, high signal-to-noise ratio, dual channel G-class audio amplifier. The chip integrates multiple power rail adaptive boost units internally. When powered by a 3.7V lithium battery, it can drive a dual channel 4Ω load and output 2×4.5W constant power. This chip has a low battery voltage detection function. Once the battery voltage drops below 3.5V, the amplifier automatically gradually reduces its gain to protect the battery from being shut down by high current at low voltage, while ensuring more stable and reliable power supply for other devices in the application environment at low voltage. The ALC function can automatically detect output distortion, dynamically adjust amplifier gain, and ensure that the output audio signal does not have significant distortion. ANT8821 adopts spectrum spreading PWM modulation technology, which enables the amplifier to achieve EMI characteristics comparable to Class AB amplifiers when operating in Class D mode.
In addition, ANT8821 has built-in overcurrent protection and overheat protection functions, ensuring the reliability and stability of the chip in various application environments.
ANT8821 Features:
2×4.5W output power
Multi channel power rail adaptive boost
ALC automatic gain control
Low battery voltage detection
Ultra low EMI
Fully differential circuit structure, strong anti-interference ability
Pop click noise suppression for power up and down
0.05% distortion
90dB signal-to-noise ratio
Single power supply voltage of 3V~5.5V
Overcurrent protection.
Overheating protection.
ETSSOP24 encapsulation
ANT8821 Applications:
Portable Bluetooth speaker, WiFi speaker
Car GPS
Portable amplifier
ANT8821 Typical application circuit:
ANT8821 Pin allocation diagram:
ANT8821 Single ended input mode circuit diagram:
ANT8821 Differential input mode circuit diagram:
ANT8821 is an adaptive boost, ultra-low EMI, high signal-to-noise ratio, dual channel G-class audio amplifier. The chip integrates multiple power rail adaptive boost units internally. When powered by a 3.7V lithium battery, it can drive a dual channel 4Ω load and output 2×4.5W constant power. This chip has a low battery voltage detection function. Once the battery voltage drops below 3.5V, the amplifier automatically gradually reduces its gain to protect the battery from being shut down by high current at low voltage, while ensuring more stable and reliable power supply for other devices in the application environment at low voltage. The ALC function can automatically detect output distortion, dynamically adjust amplifier gain, and ensure that the output audio signal does not have significant distortion. ANT8821 adopts spectrum spreading PWM modulation technology, which enables the amplifier to achieve EMI characteristics comparable to Class AB amplifiers when operating in Class D mode.
In addition, ANT8821 has built-in overcurrent protection and overheat protection functions, ensuring the reliability and stability of the chip in various application environments.
ANT8821 Features:
2×4.5W output power
Multi channel power rail adaptive boost
ALC automatic gain control
Low battery voltage detection
Ultra low EMI
Fully differential circuit structure, strong anti-interference ability
Pop click noise suppression for power up and down
0.05% distortion
90dB signal-to-noise ratio
Single power supply voltage of 3V~5.5V
Overcurrent protection.
Overheating protection.
ETSSOP24 encapsulation
ANT8821 Applications:
Portable Bluetooth speaker, WiFi speaker
Car GPS
Portable amplifier
ANT8821 Typical application circuit:
ANT8821 Pin allocation diagram:
ANT8821 Single ended input mode circuit diagram:
ANT8821 Differential input mode circuit diagram:
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