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Audio amplifier handles start/stop transients in cars

Audio amplifier handles start/stop transients in cars

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By eeNews Europe



The TDA7802 extends ST’s family of “green power” products designed to support advanced technologies for cleaner cars, such as start/stop (micro-hybrid), which reduces emissions by cutting the engine instead of idling. The TDA7802 operates seamlessly even when its supply voltage drops as the engine restarts. Its digital input connects directly to a digital sound processor, saving digital/analogue converter and low-pass filter components. This approach reduces application size and cost, while ensuring clearer sound and improving coexistence with other equipment such as mobile phones.

The class SB-I (SB-Improved) analogue amplifier can achieve 50% lower heat dissipation than a class AB analogue amplifier, allowing smaller heatsinks or extra functionality in the head unit within the same thermal budget. The thermal performance makes the TDA7802 a valuable alternative when a class D solution cannot be used.

The TDA7802 delivers 4x50W into 4Ω speakers and will drive loads as low as 1Ω. It has outstanding noise performance, achieving SNR of 115 dB, and over 110 dB dynamic range. Built-in diagnostics protect against short-circuit failures or speaker disconnection. It comes in PowerSO36 or Flexiwatt27 through-hole/surface-mount packages, priced from $7.00 (1000).

ST; www.st.com/tda7802

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