Technical data for Amplifier(30w) used in cars

The power that can be obtained from a standard car radio amplifier operating from a 12 V car battery is 5–6W, which (for many listeners) is not really enough for satisfactory hi-fi reproduction. It is, of course, possible to boost the 12 V supply with a power inverter, but that is fairly expensive and not always acceptable. Now, a Philips IC enables audio power of about 30 W to be obtained from a 12 V car battery

Technical Data

Class H operation

Low dissipation with music signals

Extensive protection circuits (output current; temperature; load impedance)

Supply voltage 12 V nominal

Quiescent current 100 mA

Output power

(1 kHz sinusoidal, THD = 0.5%) 30 W r.m.s. into 8 Ω

(music signal) 40 W into 8 Ω

THD + noise (1 W into 8 Ω = 0.05% (20 Hz to 20 kHz)

THD + noise (20 W into 8 Ω = 0.2% (20 Hz to 20 kHz)

Power bandwidth (–3 dB) 5 Hz to 100 kHz