Shenzhen Nsiway Tech NS4816

NS4816 is a filterless Class G audio power amplifier with automatic gain control (AGC) and an integrated high-efficiency charge pump boost power supply. The device continuously monitors output power and adjusts internal gain accordingly to prevent prolonged speaker overload.

The integrated charge pump generates a 5.9V supply voltage for the amplifier's output stage. With an 8Ω load under lithium battery power supply conditions, it delivers a continuous constant output power of 1W (THD+N = 1%). The NS4816 achieves a peak efficiency of up to 81%, significantly extending battery life during music playback.

The multi-level constant output power AGC technology enables designers to select the appropriate power level to match different speakers.

The NS4816 is available in a WLCSP package (1.63mm * 1.63mm).

• Built-in AGC with 3-level constant output power control
• 1.2W, 1W, 0.8W (8Ω)
• Built-in charge pump power system
• High efficiency: 81%
• Maximum output power Po = 2.2W (RL = 8Ω, VDD = 4.2V, THD+N = 10%)
• Low THD+N = 0.015% (f = 1kHz, RL = 8Ω, Po = 0.5W, VDD = 3.8V)
• Built-in thermal protection and overvoltage protection
• Built-in pop and click noise suppression
• High RF interference immunity
• Single-wire pulse control
• WLCSP package (1.63mm * 1.63mm)

• Mobile phones and tablets
• Portable media players