PT2004 2.2W x 2 Class-D Audio Power Amplifier DESCRIPTION FEATURES 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. • • • • • • • • • • • • 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 BLOCK DIAGRAM PT2004 internal block diagram (diagram shows single channel only) PVDD Vref R3 R1 INL+ C omp A2 A1 A3 OUTL+ INL- R2 Vref R4 SQ -WA V E Generator G0 Vref G1 Gate Driver A nd C ontrol Logic Vref PGND PVDD SDR 300K P ower Management OUTL- SDL 300K PGND AGND AVDD Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2004 APPICATION CIRCUIT DIAGRAM (1) SINGLE-ENDED INPUT SHUTDOWN CONTROL A1 0.22uF B1 C1 B4 PT2004 SDL SDR B2 G1 C2 G0 0.22uF Lin B3 GAIN CONTROL INL+ OUTL+ INL- OUTL- INR- OUTR- INR+ OUTR+ A3 FB D4 L SPK FB FB 1n 1n D3 R SPK FB A2 PVDD AVDD PGND D2 C3 AGND 0.22uF C4 D1 1n A4 0.22uF Rin 1n VDD 1uF (2) DIFFERENTIAL INPUT Lin- 0.22uF 0.22uF A1 B1 C1 Rin- B4 PT2004 SDL SDR B3 G1 G0 Lin+ B2 SHUTDOWN CONTROL C2 GAIN CONTROL INL+ OUTL+ INL- OUTL- INR- OUTR- INR+ OUTR+ A3 FB PVDD 1n 1n D3 FB R SPK A2 AVDD PGND D2 C4 C3 0.22uF AGND D1 L SPK FB FB 0.22uF Rin+ 1n A4 D4 1n VDD 1uF Ferrite Bead (FB) specification: Z = 220Ω@100MHz, current capability > 2A. V1.0 2 PT2004 ORDER INFORMATION Valid Part Number PT2004-CS Package Type 16 balls, WLCSP Top Code PT2004 PIN CONFIGURATION (Top View) PIN DESCRIPTION Pin A1 B1 C1 D1 A2 B2 C2 D2 A3 B3 C3 D3 A4 B4 C4 D4 V1.0 I/O I I I I Power I I Power O I Power O O I Power O Symbol INL+ INLINRINR+ PVDD G1 G0 AVDD OUTL+ SDR AGND OUTR+ OUTRSDL PGND OUTR- Function Left channel input (+) Left channel input (-) Right channel input (-) Right channel input (+) Output supply Gain setting 1 Gain setting 0 Analog supply Left channel output (+) Right channel shutdown Analog ground Right channel output (+) Left channel output (-) Left channel shutdown Power ground Right channel output (-) 3