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1. General description
The TDA8559T is a stereo amplifier that operates over a wide supply voltage range from
1.9 V to 30 V and consumes a very low quiescent current. This makes it suitable for
battery fed applications (2 × 1.5 V cells). Because of an internal voltage buffer, this device
can be used with or without a capacitor connected in series with the load. It can be
applied as a headphone amplifier, but also as a mono amplifier with a small speaker
(25 Ω), or as a line driver in mains applications.
2. Features
■ Operating voltage from 1.9 V to 30 V
■ Very low quiescent current
■ Low distortion
■ Few external components
■ Differential inputs
■ Usable as a mono amplifier in Bridge-Tied Load (BTL) or stereo Single-Ended (SE)
■ Single-ended mode without loudspeaker capacitor
■ Mute and Standby mode
■ Short-circuit proof to ground, to supply voltage (< 10 V) and across load
■ No switch on or switch off clicks
■ ESD protected on all pins
3. Applications
■ Portable telephones
■ MP3 players
■ Portable audio
■ Mains fed equipment
TDA8559T
Low-voltage stereo headphone amplifier
Rev. 03 — 15 May 2006 Product data sheets