The CS8509E is a high efficiency, ultra-low EMI, Class AB Class D mode switchable 8.0W mono audio amplifier. With a supply voltage of 7.4V, the CS8509E can produce 6.8W of power for a 4Ω load.
    CS8509E in Class D mode, the filter-free PWM modulation structure reduces external components, PCB area and system costs, and also simplifies the design. Wide operating voltage range of 2.5-8.8V, efficiency of up to 90% in Class D mode, fast start-up time and small package size make CS8509E the most suitable audio amplifier for dual Li-ion batteries in series power supply.
    CS8509E's fully differential architecture and extremely high PSRR effectively improve CS8509E's ability to suppress RF noise, and eliminate the BYPASS capacitance of traditional audio amplifiers.
    CS8509E has built-in overcurrent protection, short circuit protection and overheat protection, which effectively protects the chip from being damaged under abnormal working conditions.
    The CS8509E is available in a small ESOP8L package with a rated operating temperature range of -40 ° C to 85 ° C.

Output power ---- Class D mode

  VDD=8.5V, THD+N=10%

  RL=8Ω  4.20W

  RL=4Ω  8.50W

  VDD=5.0V, THD+N=1%

  RL=8Ω  1.50W

  RL=4Ω  2.65W

Output power ----- in class AB mode

  VDD=8.5V, THD+N=10%

  RL=8Ω  4.00W

  RL=4Ω  8.00W

  VDD=5.0V, THD+N=10%

  RL=8Ω  1.30W

  RL=4Ω  3.00W

Operating voltage range: 2.5-9.2V
Excellent "pop-noise" suppression
Class-D structure without filtering
Class D mode up to 90% efficiency
High power supply rejection ratio (PSRR) : -80dB at 217Hz
Fast startup time (200ms)
Low static current (3mA)
Low turn-off current (<0.1uA)
Overcurrent protection, short circuit protection and overheat protection
Rohs compliant lead-free package

Multimedia speaker
megaphone

ESOP8L