DESCRIPTION
The PT2004 is a CLASS-D power amplifier designed for audio equipments, maximum output power can reach up to 2.2W x 2 (VDD=5V, RL=4Ω, THD=10%). The PT2004 composed of exclusively designed CLASS-D circuitry (patented) by PTC, along with the most advanced semi-conductor fabricate technology. When compared to the traditional CLASS-AB amplifiers, the PT2004’s shows much higher efficiency (> 80%), low heat dissipation, and also performs superior audio quality.
The PT2004’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
• Stereo differential analogue input
• Maximum output power 2.2W(4Ω) × 2 @ THD=10%
• Output low-pass LC filter is not necessary
• Low EMI radiation, CISPR 22 regulation Compliant
• 4 level voltage gain selection
• Contains shutdown function for individual channel
• Fast start-up time (3.5ms) when shutdown awake up
• Built-in short circuit protection
• Built-in over-temperature protection
• High efficiency (85%, 8Ω load), low heat dissipation
• Wafer level WLCSP 16 balls package

APPLICATIONS
• Mobile phone
• Portable Media Player
• Personal Navigation Device
• Hands-free phone