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Audio Power Amplifiers | NCP2991

Audio Power Amplifier, Class AB, 1.35 W, with Selectable Fast Turn-On Time

Obsolete

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Overview

The NCP2991 is an audio power amplifier designed for portable communication device applications such as mobile phone applications. The NCP2991 is capable of delivering 1.35 W of continuous average power to an 8.0 Ω BTL load from a 5.0 V power supply, and 1.1 W to a 4.0 Ω BTL load from 3.6V power supply. The NCP2991 provides high quality audio while requiring few external components and minimal power consumption. It features a low-power consumption shutdown mode, which is achieved by driving the /SD pin with logic low. The NCP2991 contains circuitry to prevent from pop and click noise that would otherwise occur during turn-on and turn-off transitions. It is a zero pop noise device when a single ended or a differential audio input is used. For maximum flexibility, the NCP2991 provides an externally controlled gain (with resistors). In addition, it integrates 2 differents Turn On times (15 ms or 30ms) adjustable with the TON pin. Due to its best-in-class PSRR, it can be directly connected to the battery, saving the use of an LDO. This device is available in a 9-Pin Flip-Chip CSP (Lead-Free).

  • Audio amplification

  • Mobile phone
  • PDAs, MP3, PMP

  • 1.35 W to an 8.0Ω BTL load from a 5.0 V power supply
  • Best-in-Class PSRR: up to -100 dB
  • Zero pop noise signature with single-ended or differential audio input
  • External turn-on time configuration capability: 15 ms or 30 ms
  • Ultra-low current shutdown mode: 10 nA
  • 2.5 V-5.5 V operation
  • External gain configuration capability
  • Thermal overload protection circuitry

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NCP2991FCT2G

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Obsolete

CAD Model

Pb

A

H

P

Flip-Chip-9

499E

1

260

DSFTP

3000

N

AB

1.35

5.5

BTL

30

0.015

1.8

20

Price N/A

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