DESCRIPTION
The PT2333 is a CLASS-D power amplifier designed for audio equipments, maximum output power
can reach up to 2.5W (VDD = 5V, RL = 4Ω, THD = 10%). The PT2333 composed of exclusively
designed CLASS-D circuitry (patented) by PTC, along with the most advanced semi-conductor
technology. When compared to the traditional CLASS-AB amplifiers, the PT2333’s has a much higher
efficiency (> 80%), low heat dissipation, and produces superior audio quality. PT2333’s external
circuitry is simple and easily accessible, and consists of flawless self-protection capabilities. The
chip’s packaging is small, thus it occupies an insignificant amount of space on the circuit board;
therefore, making it the predominant choice when it comes to audio amplifiers.

FEATURES
• CMOS Technology
• Operating voltage range from 2.7V up to 5.5V
• Differential analog input
• Maximum output power 2.5W(4Ω) @ THD=10%
• Output low-pass LC filter is not required.
• Voltage gain determinate by the external resister.
• Contains shutdown function
• POP noises free in shutdown and power ON/OFF period
• Built-in short circuit protection
• Built-in overheat protection
• High efficiency (8Ω load > 85%), low heat dissipation
• MSOP-10 pins and W-CSP 9 pins miniature packages

APPLICATIONS
• Cellular Phone
• Portable Media Player
• GPS
• LCD Monitor
• Small multimedia speakers
• Hand-free phone
• Laptop
• Other audio applications