Rainbow-electronics MAX9717 Manual de usuario descargar pdf (Pagina 1)

General Description

The MAX9716/MAX9717 audio power amplifiers are ideal

for portable audio devices with internal speakers. A

bridge-tied load (BTL) architecture minimizes external

component count, while providing high-quality audio

reproduction. Both devices deliver 1.4W continuous

power into a 4Ω load with less than 1% Total Harmonic

Distortion (THD) while operating from a single +5V sup-

ply. With an 8Ω load, both devices deliver 1W continuous

power. These devices also deliver 350mW continuous

power into an 8Ω load while operating from a single

+3.0V supply. The devices are available as adjustable

gain amplifiers (MAX9716/MAX9717A) or with internally

fixed gains of 6dB, 9dB, and 12dB (MAX9717B/

MAX9717C/MAX9717D), reducing component count.

A low-power shutdown mode disables the bias generator

and amplifiers, reducing quiescent current consumption

to less than 10nA. These devices feature Maxim’s

industry-leading, comprehensive click-and-pop sup-

pression that reduces audible clicks and pops during

startup and shutdown.

The MAX9717 features a headphone sense input (BTL/SE)

that senses when a headphone is connected to the

device, disables the BTL slave driver, muting the speaker

while driving the headphone as a single-ended load.

The MAX9716 is pin compatible with the LM4890 and is

available in 9-bump UCSP™, 8-pin TDFN (3mm x

3mm), and 8-pin µMAX packages. The MAX9717 is

available in 9-bump UCSP, 8-pin TDFN, and 8-pin

µMAX packages. Both devices operate over the -40°C

to +85°C extended temperature range.

Applications

Mobile Phones

PDAs

Portable Devices

Features

♦ 2.7V to 5.5V Single-Supply Operation

♦ 1.4W into 4Ω at 1% THD+N

♦ 10nA Low-Power Shutdown Mode

♦ 73dB PSRR at 1kHz

♦ No Audible Clicks or Pops at Power-Up/Down

♦ Internal Fixed Gain to Reduce Component Count

(MAX9717B/C/D)

♦ Adjustable Gain Option (MAX9716/MAX9717A)

♦ BTL /SE Input Senses when Headphones are

Connected (MAX9717)

♦ Pin Compatible with LM4890 (MAX9716)

♦ Pin Compatible with TPA711 (MAX9717A)

♦ Available in Compact, Thermally Enhanced µMAX

and TDFN (3mm x 3mm) Packages

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio Power

Amplifiers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

BTL/SE

BIAS

IN-

MAX9717B/C/D

SINGLE SUPPLY

2.7V TO 5.5V

BIAS

IN-

MAX9716

SINGLE SUPPLY

2.7V TO 5.5V

Simplified Block Diagrams

19-3146; Rev 0; 1/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Pin Configurations and Selector Guide appear at end of data

sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

*Future product—contact factory for availability.

**EP = Exposed paddle.

PART

TEMP RANGE

PIN-

PACKAGE

GAIN

(dB)

MAX9716ETA

-40°C to +85°C 8 TDFN-EP**

Adj.

MAX9716EBL-T*

-40°C to +85°C

3 x 3 UCSP

Adj.

MAX9716EUA

-40°C to +85°C 8 µMAX-EP**

Adj.

Ordering Information continued at end of data sheet.

1 2 3 4 5 6 ... 18 19

Indice de contenidos

Pagina 1 - Amplifiers

General DescriptionThe MAX9716/MAX9717 audio power amplifiers are idealfor portable audio devices with internal speakers. Abridge-tied load (BTL) arch

Pagina 2

MAX9716/MAX9717Applications InformationBTL AmplifierThe MAX9716/MAX9717 are designed to drive a loaddifferentially, a configuration referred to as bri

Pagina 3

Adjustable GainGain-Setting ResistorsExternal feedback resistors set the gain of theMAX9716 and MAX9717A. Resistors RFand RIN(seeFigure 2) set the gai

Pagina 4

MAX9716/MAX9717BIAS CapacitorBIAS is the output of the internally-generated VCC/2 biasvoltage. The BIAS bypass capacitor, CBIAS, improves thepower-sup

Pagina 5

UCSP Applications InformationFor the latest application details on UCSP construction,dimensions, tape carrier information, printed circuit boardtechni

Pagina 6

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers14 ______________________________________________________________________________________

Pagina 7

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers______________________________________________________________________________________ 15

Pagina 8

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers16 ______________________________________________________________________________________

Pagina 9

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers______________________________________________________________________________________ 17

Pagina 10

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers18 ______________________________________________________________________________________

Pagina 11

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely

Pagina 12

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers2 _______________________________________________________________________________________

Pagina 13

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers_______________________________________________________________________________________ 3

Pagina 14

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers4 _______________________________________________________________________________________

Pagina 15

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers_______________________________________________________________________________________ 5

Pagina 16

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers6 _______________________________________________________________________________________

Pagina 17

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers_______________________________________________________________________________________ 7

Pagina 18 - 6, 8, &10L, DFN THIN.EPS

MAX9716/MAX9717Low-Cost, Mono, 1.4W BTL Audio PowerAmplifiers8 _______________________________________________________________________________________

Pagina 19

Detailed DescriptionThe MAX9716/MAX9717 are 1.3W BTL speaker ampli-fiers. Both devices feature a low-power shutdownmode, and industry-leading click-an

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