Description: Orginal TDA1554Q IC 

The TDA1554Q is an integrated class-B output amplifier in a 17-lead single-in-line (SIL) plastic power package. The circuit contains 4 x 11 W single-ended or 2 x 22 W bridge amplifiers. The device is primarily developed for car radio applications.

Functional Description

The TDA1554Q contains four identical amplifiers with differential input stages (two inverting and two non-inverting) and can be used for single-ended or bridge applications. The gain of each amplifier is fixed at 20 dB (26 dB in BTL). A special feature of this device is:

• Low stand-by current (< 100 µA)
• Low mute/stand-by switching current (low cost supply switch)
• Mute facility

• Low stand-by current (< 100 µA)
• Low mute/stand-by switching current (low cost supply switch)
• Mute facility