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HT8691
The HT8691 is a Class D audio power amplifier with a built-in BOOST module.
The biggest feature of the HT8691 is the anti-clipping distortion (ACF) output control function. At the same time, the chip has ACF-Off mode. The chip has the free switching function of class AB and Class D.
The HT8691's built-in turn-off function minimizes standby current, and also integrates output overcurrent protection, on-chip overtemperature protection, and power undervoltage protection.
The HT8691 is available in a SOP8L-PP package.
The biggest feature of the HT8691 is the anti-clipping distortion (ACF) output control function. At the same time, the chip has ACF-Off mode. The chip has the free switching function of class AB and Class D.
The HT8691's built-in turn-off function minimizes standby current, and also integrates output overcurrent protection, on-chip overtemperature protection, and power undervoltage protection.
The HT8691 is available in a SOP8L-PP package.
HT8691R Description:
The HT8691R is a Class D audio power amplifier with a built-in BOOST module. The built-in BOOST module can adjust the boost value through an external resistor, even when powered by a lithium battery, it can continuously output 11W of power at a 2Ω load up to 7.5V. It supports external Settings to adjust the BOOST output voltage.
The biggest feature of HT8691R is the anti-clipping distortion (ACF) output control function, which can detect and suppress the output signal clipping distortion (broken sound) caused by the input music and speech signal amplitude is too large, and can also adaptively prevent the output clipping caused by the BOOST boost voltage drop, significantly improving the sound quality and creating a very comfortable listening enjoyment. And protect the speaker from overload damage. At the same time, the chip has ACF-Off mode. HT8691R has the free switching function of Class AB and Class D, and can be switched to Class AB audio power amplifier mode at any time when it is troubled by Class D amplifier EMI interference.
HT8691R integrates filter-free digital modulation technology, which can directly drive the speaker and minimize the distortion and noise of the pulse output signal. The output does not require a filter network, and very few external components save system space and cost, making it ideal for portable applications.
In addition, the HT8691R's built-in turn-off function minimizes standby current and integrates functions such as output overcurrent protection, on-chip overtemperature protection and power undervoltage protection.
The HT8691R is available in a SOP8L-PP package.
The biggest feature of HT8691R is the anti-clipping distortion (ACF) output control function, which can detect and suppress the output signal clipping distortion (broken sound) caused by the input music and speech signal amplitude is too large, and can also adaptively prevent the output clipping caused by the BOOST boost voltage drop, significantly improving the sound quality and creating a very comfortable listening enjoyment. And protect the speaker from overload damage. At the same time, the chip has ACF-Off mode. HT8691R has the free switching function of Class AB and Class D, and can be switched to Class AB audio power amplifier mode at any time when it is troubled by Class D amplifier EMI interference.
HT8691R integrates filter-free digital modulation technology, which can directly drive the speaker and minimize the distortion and noise of the pulse output signal. The output does not require a filter network, and very few external components save system space and cost, making it ideal for portable applications.
In addition, the HT8691R's built-in turn-off function minimizes standby current and integrates functions such as output overcurrent protection, on-chip overtemperature protection and power undervoltage protection.
The HT8691R is available in a SOP8L-PP package.
HT8691R Features:
Anti-Clipping Function (Anti-clipping Function,ACF)
No filter digital modulation, directly drive the speaker
Output power
No filter digital modulation, directly drive the speaker
Output power
9.0W (V BAT =3.7V, PVDD = 7.5V, R L =3?,
THD+N=10%)
11.0W (V BAT =3.7V, PVDD = 7.5V, R L =2?,
THD+N=10%
5.5W (V BAT =3.7V, PVDD = 6.5V, R L =4?,
THD+N=10%)
Power source
- Boost input V BAT: 2.5V to 5.5V
- Boost output PVDD: V BAT to 7.5V
BOOST output voltage is adjustable
The AB/D class can be switched
Protection function: over current/over heat/under voltage abnormal protection function
The HT8691R is available in a SOP8L-PP package.
- Boost output PVDD: V BAT to 7.5V
BOOST output voltage is adjustable
The AB/D class can be switched
Protection function: over current/over heat/under voltage abnormal protection function
The HT8691R is available in a SOP8L-PP package.
HT8691R Application:
Bluetooth speaker
Portable speaker
2.1 Channel small speaker
megaphone
iphone/ipod/ipod docking
MP4, navigator
Tablets, laptops
Smart phone
Small size LCD TV/monitor
Portable game console
Portable speaker
2.1 Channel small speaker
megaphone
iphone/ipod/ipod docking
MP4, navigator
Tablets, laptops
Smart phone
Small size LCD TV/monitor
Portable game console
HT8691R Typical application circuit diagram:
HT8691R pin distribution:
HT8691R pin definition:
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