ne58633 NXP Semiconductors, ne58633 Datasheet

ne58633

Manufacturer Part Number

ne58633

Description

Noise Reduction Class-d Headphone Driver Amplifier

Manufacturer

NXP Semiconductors

Datasheet

1.NE58633.pdf (25 pages)

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1. General description

2. Features

The NE58633 is a stereo, noise reduction, class-D, Bridge-Tied Load (BTL) headphone

driver ampliﬁer. Each channel comprises a class-D BTL headphone driver ampliﬁer, an

electret microphone low noise preampliﬁer, feedback noise reduction circuit and a music

ampliﬁer input.

The NE58633 operates with a battery voltage of 0.9 V to 1.7 V. The chip employs an

on-chip DC-to-DC boost converter and internal V

output to ground for noise decoupling. It features mute control and plop and click reduction

circuitry. The gain of the microphone ampliﬁer and ﬁlter ampliﬁer is set using external

resistors. Differential architecture provides increased immunity to noise.

The NE58633 is capable of driving 800 mV

ElectroStatic Discharge (ESD) and short-circuit protection.

It is available in the 32-pin HVQFN32 (5 mm

density small-scale layouts and is an ideal choice for noise reduction headphones and

educational audio aids.

NE58633

Noise reduction class-D headphone driver ampliﬁer

Rev. 01 — 22 January 2009

Low current consumption of 4.4 mA

0.9 V to 1.7 V battery operating voltage range

1 % THD+N at V

10 % THD+N at 800 mV

voltage of 1.5 V

Output noise voltage with noise reduction circuit typically 31 mV

On-chip mute function

Plop and click reduction circuitry

Class-D BTL differential output conﬁguration

Electret microphone noise reduction polarization ampliﬁer with external gain

adjustment using resistors

Music and ﬁlter ampliﬁer with external gain adjustment using resistors

DC-to-DC converter circuitry (3 V output) with 2.5 mA (typical) load current

Internal voltage reference pinned out for noise decoupling

Available in HVQFN32 package

= 1 V

rms

driving 16

output voltage driving 16

with a battery voltage of 1.5 V

rms

5 mm

across a 16

ref

voltage reference which is ﬁltered and

0.85 mm) package suitable for high

and 32

or 32

Product data sheet

rms

loads with a battery

load and provides

for G

v(cl)

= 25 dB

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