TMPA421DS

Tai-1 Microelectronics www.taimec.com.tw / www.class-d.com.tw Preliminary TMPA421DS R ev.2.0 December 20, 2005 15W + 6W × 2 2.1 Channel CLASS-D AUDIO POWER AMPLIFIER GENERAL DESCRIPTION FEATURES The TMPA421DS is a 2.1 Channel Class-D output ♦ Integrated 2.1 channel power amplifier in one audio power amplifier for driving speakers with high power efficiency. The bass output is designed as BTL (Bridge-Tied-Load) for high chip ♦ 15W + 6W × 2 2.1 Channel Class-D Output output power. The right& left channels are ♦ Power efficiency is up to 82% designed as SE (Single-Ended). The outputs are ♦ Convenient gain control able to drive 4Ω, 6Ω, 8Ω or 16Ω speakers. The output power can be up to 15W for bass and 6W ♦ Time delay for de-pop control for either Right or Left channel. No external heat-sink is necessary. The gain of the amplifier is defined by either gain0/gain1 gain control or by input resistance. Thermal protection and short-circuit protection are integrated for safety purpose. The internal de-pop circuitry eliminates pop noise at power-up & shutdown operations. ♦ Thermal Protection ♦ Output Pin Short-Circuit Protection (Short to Other Outputs, Short to VCC, Short to Ground) ♦ Low Quiescent Current (10mA Typical at 12V) ♦ Low Current in Shutdown Mode (