The NS4745 is a dual-mode mono audio amplifier with Noise gate control, ultra-low EMI, and Class AB/D operating mode switching.
    Unique Noise gate control function can effectively identify noise signal and audio signal, when the identification is noise, power amplifier automatic Mute, patented technology to ensure the recognition of high precision, effectively distinguish noise and weak audio signal, completely eliminate the interference of background noise, even if the caller is in a noisy environment, What the other party hears is still a clear voice signal, which greatly improves the hearing feeling of the listener. AB/D switching function combines the advantages of Class AB power amplifier and D power amplifier, and can be switched to class AB when playing FM and ATV, without EMI interference. Switch to Class D when talking or playing MP3, achieving more than 95% efficiency, greatly saving battery power consumption and extending battery life.
    NS4745 at 4.2V operating voltage, capable of 8? The load provides 1.5W output power and 95% efficiency, which is the best choice for smart phones and feature phones that pursue large volume and high call effect.
    NS4745 built-in overcurrent protection, overheat protection and undervoltage protection functions, effectively protect the chip from being damaged under abnormal working conditions.
    The NS4745 is packaged in TQFN3×3-20 and is pin compatible with the NS4733. The rated operating temperature range is -40℃ to 85℃.

Class AB/Class D working mode switching function
Class AB /D operating mode and low power off mode save master GPIO by one-line pulse control
Noise gate Noise reduction control effectively eliminates the "bottom noise" of the sound source and the ambient noise during the call
1.5W output power (4.2V supply, 8Ω load)
Excellent full bandwidth EMI rejection
Excellent "power on, power off" noise suppression
The efficiency of Class D working mode is up to 95%
Operating voltage range: 2.8V ~ 5.5V
Overcurrent protection, overheat protection, undervoltage protection
The NS4745 is available in a TQFN3×3-20 package

Mobile phone
Tablet computer