MAX9777ETI+ Maxim Integrated Products, MAX9777ETI+ Datasheet

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MAX9777ETI+

Manufacturer Part Number
MAX9777ETI+
Description
IC AMP AUDIO PWR 2.6W AB 28TQFN
Manufacturer
Maxim Integrated Products
Type
Class ABr
Datasheet
1.MAX9777ETIT.pdf (27 pages)

Specifications of MAX9777ETI+

Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2.6W x 2 @ 4 Ohm; 200mW x 2 @ 16 Ohm
Voltage - Supply
4.5 V ~ 5.5 V
Features
Depop, I²C, Input Multiplexer, Mute, Shutdown, Thermal Protection
Mounting Type
Surface Mount
Package / Case
28-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX9777/MAX9778 combine a stereo 3W bridge-
tied load (BTL) audio power amplifier, stereo single-
ended (SE) headphone amplifier, headphone sensing,
and a 2:1 input multiplexer all in a tiny 28-pin thin QFN
package. These devices operate from a single 4.5V to
5.5V supply and feature an industry-leading 100dB
PSRR, allowing these devices to operate from noisy
supplies without the addition of a linear regulator. An
ultra-low 0.002% THD+N ensures clean, low-distortion
amplification of the audio signal. Click-and-pop sup-
pression minimizes audible transients on power and
shutdown cycles. Power-saving features include low
4mV V
speakers), low 13mA supply current, and a 10µA shut-
down mode. A MUTE function allows the outputs to be
quickly enabled or disabled.
A headphone sense input detects the presence of a
headphone jack and automatically configures the
amplifiers for either speaker or headphone mode. In
speaker mode, the amplifiers can deliver up to 3W of
continuous average power into a 3Ω load. In head-
phone mode, the amplifier can deliver up to 200mW of
continuous average power into a 16Ω load. The gain of
the amplifiers is externally set, allowing maximum flexi-
bility in optimizing output levels for a given load. The
amplifiers also feature a 2:1 input multiplexer, allowing
multiple audio sources to be selected. The multiplexer
can also be used to compensate for limitations in the
frequency response of the loud speakers by selecting
an external equalizer network. The various functions are
controlled by either an I
simple parallel control interface (MAX9778).
The MAX9777/MAX9778 are available in a thermally
efficient 28-pin thin QFN package (5mm x 5mm x
0.8mm). These devices have thermal-overload protec-
tion (OVP) and are specified over the extended -40°C
to +85°C temperature range.
19-0509; Rev 0; 4/06
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.
Notebooks
Portable DVD Players
Tablet PCs
OS
(minimizes DC current drain through the
________________________________________________________________ Maxim Integrated Products
Stereo 3W Audio Power Amplifiers with
General Description
2
C-compatible (MAX9777) or
PC Audio Peripherals
Camcorders
Multimedia Monitor
Applications
Headphone Drive and Input Mux
♦ Industry-Leading, Ultra-High 100dB PSRR
♦ 3W BTL Stereo Speaker Amplifier
♦ 200mW Stereo Headphone Amplifier
♦ Low 0.002% THD+N
♦ Click-and-Pop Suppression
♦ ESD-Protected Outputs
♦ Low Quiescent Current: 13mA
♦ Low-Power Shutdown Mode: 10µA
♦ MUTE Function
♦ Headphone Sense Input
♦ Stereo 2:1 Input Multiplexer
♦ Optional 2-Wire, I
♦ Tiny 28-Pin Thin QFN (5mm
Note: All devices are specified over the -40°C to +85°C operat-
ing temperature range.
+Denotes lead-free package.
*EP = Exposed paddle.
Pin Configurations and Functional Diagrams appear at end
of data sheet.
MAX9777ETI+
MAX9778ETI+
Interface
Package
CONTROL
RIGHT IN
RIGHT IN
LEFT IN
LEFT IN
PART
1
2
1
2
Simplified Block Diagram
COMPATIBLE
I
2
BTL
SE/
INTERFACE
C Compatible 28 Thi n QFN - E P * T2855-6
I
CONTROL
2
C-
Parallel
SINGLE SUPPLY
2
4.5V TO 5.5V
C-Compatible or Parallel
Ordering Information
MAX9777
PIN-
PACKAGE
28 Thi n QFN - E P * T2855-6
x
5mm
x
Features
0.8mm)
C O D E
PK G
1

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MAX9777ETI+ Summary of contents

Page 1

... Stereo 2:1 Input Multiplexer ♦ Optional 2-Wire, I Interface ♦ Tiny 28-Pin Thin QFN (5mm Package PART MAX9777ETI+ MAX9778ETI+ Note: All devices are specified over the -40°C to +85°C operat- ing temperature range. +Denotes lead-free package. *EP = Exposed paddle. Pin Configurations and Functional Diagrams appear at end of data sheet ...

Page 2

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ...

Page 3

Stereo 3W Audio Power Amplifiers with ELECTRICAL CHARACTERISTICS (continued 5.0V, GND = PGND = 0V noted. Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL OUTPUT AMPLIFIERS (HEADPHONE MODE, HPS ...

Page 4

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ELECTRICAL CHARACTERISTICS (continued 5.0V, GND = PGND = 0V noted. Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL ...

Page 5

Stereo 3W Audio Power Amplifiers with ( 5V, GND = PGND = 0V TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (SPEAKER MODE 3Ω 2V ...

Page 6

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ( 5V, GND = PGND = 0V TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (SPEAKER MODE) 100 ...

Page 7

Stereo 3W Audio Power Amplifiers with ( 5V, GND = PGND = 0V POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (SPEAKER MODE 200mV RIPPLE P 100 10 100 ...

Page 8

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ( 5V, GND = PGND = 0V TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (HEADPHONE MODE 32Ω ...

Page 9

Stereo 3W Audio Power Amplifiers with ( 5V, GND = PGND = 0V POWER DISSIPATION vs. OUTPUT POWER (HEADPHONE MODE) 120 100 16Ω 1kHz 0 ...

Page 10

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux ( 5V, GND = PGND = 0V SUPPLY CURRENT vs. SUPPLY VOLTAGE (HEADPHONE MODE +85° ...

Page 11

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux PIN NAME MAX9777 MAX9778 1 — 2 — GAINLA 8 8 GAINLB 9, 13, 23 13, 23, ...

Page 12

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux Detailed Description The MAX9777/MAX9778 feature 3W BTL speaker amplifiers, 200mW headphone amplifiers, input multi- plexers, headphone sensing, and comprehensive click- and-pop suppression. The MAX9777/MAX9778 are stereo BTL/headphone amplifiers. The ...

Page 13

Stereo 3W Audio Power Amplifiers with Table 1b. MAX9778 HPS Setting INPUTS MODE HPS_EN HPS 0 X BTL 1 0 BTL *Note B—Gain path selected by external GAINAB Headphone Sense Input (HPS) With headphone sense ...

Page 14

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux 2 The MAX9777 features an I C/SMBus™-compatible 2- wire serial interface consisting of a serial data line (SDA) and a serial clock line (SCL). SDA and SCL facili- tate ...

Page 15

Stereo 3W Audio Power Amplifiers with Early STOP Conditions The MAX9777 recognizes a STOP condition at any point during the transmission except if a STOP condi- tion occurs in the same high pulse as a START condi- tion (Figure 5). ...

Page 16

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux There are three registers that configure the MAX9777: the MUTE register, SHDN register, and control register. In write data mode (R/W = 0), the register address and data byte ...

Page 17

Stereo 3W Audio Power Amplifiers with Table 5. MAX9777 Control Register Format REGISTER ADDRESS 0000 0011 BIT NAME VALUE 7 X Don’t Care 6 X Don’t Care 5 X Don’t Care 0* Speaker mode selected 4 SPKR/HP Headphone mode 1 ...

Page 18

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux Applications Information BTL Speaker Amplifiers The MAX9777/MAX9778 feature speaker amplifiers designed to drive a load differentially, a configuration referred to as bridge-tied load (BTL). The BTL configu- ration (Figure ...

Page 19

Stereo 3W Audio Power Amplifiers with Component Selection Gain-Setting Resistors External feedback components set the gain of the MAX9777/MAX9778. Resistor R IN input amplifier (A ), and resistor R VIN the second stage amplifier (A VOUT ⎛ ⎞ Ω 10 ...

Page 20

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux BIAS is the output of the internally generated 2.5VDC bias voltage. The BIAS bypass capacitor, C improves PSRR and THD+N by reducing power supply and other noise sources at ...

Page 21

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux 0.1µF 17 1µF 15kΩ 0.68µF 0.68µF 15kΩ HPF CODEC 0.68µF 15kΩ 19 0.68µF 15kΩ 20 HPF 4.5V TO 5.5V 1kΩ 1kΩ 10kΩ MICROCONTROLLER ...

Page 22

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux 0.1µF 1µF 15kΩ 0.68µF 0.68µF 15kΩ HPF CODEC 0.68µF 15kΩ 0.68µF 15kΩ HPF MICROCONTROLLER ...

Page 23

Stereo 3W Audio Power Amplifiers with µ 0.68 F 15kΩ AUDIO 5 INL1 INPUT 6 INL2 AUDIO INPUT µ 0.68 F 15kΩ 17 BIAS µ µ 0.68 F 15kΩ AUDIO 19 INR1 INPUT 20 INR2 AUDIO INPUT µ ...

Page 24

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux µ 0.68 F 15kΩ AUDIO 5 INL1 INPUT 6 INL2 AUDIO INPUT µ 0.68 F 15kΩ 17 BIAS µ 0.68 µ F 15kΩ AUDIO 19 INR1 INPUT ...

Page 25

Stereo 3W Audio Power Amplifiers with TOP VIEW GAINRB 22 PGND 23 24 OUTR MAX9777 26 OUTR- 27 PGND + 28 SCL THIN QFN _ ...

Page 26

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ...

Page 27

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 27 © 2006 Maxim Integrated Products ...

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