MAX4297EAG

MAX4297EAG Datasheet

MAX4295/MAX4297

Part	Datasheet
MAX4297EAG	MAX4297EAG (pdf)

Related Parts	Information
MAX4297EAG+	MAX4297EAG+
MAX4297EAG+T	MAX4297EAG+T

PDF Datasheet Preview
MAX4295/MAX4297 Mono/Stereo 2W Switch-Mode Class-D Audio Power Amplifiers The MAX4295/MAX4297 mono/stereo, switch-mode Class-D audio power amplifiers operate from a single +2.7V to +5.5V supply. They have >85% efficiency and are capable of delivering 2W continuous power to a load, making them ideal for portable multimedia and general-purpose high-power audio applications. The MAX4295/MAX4297 feature a total harmonic distortion plus noise THD+N of fOSC = 125kHz , low quiescent current of 2.8mA MAX4295 or 4.6mA MAX4297 , high efficiency, and clickless power-up and shutdown. The SHDN input disables the device and limits supply current to <1.5µA MAX4295 or <2.3µA MAX4297 . Other features include a 1A current limit, thermal protection, and under-voltage lockout. The MAX4295 mono and MAX4297 stereo reduce the number of required external components. Both devices have internal high-speed power-MOS transistors, allowing operation as bridge-tied load BTL amplifiers. The BTL configuration eliminates the need for isolation capacitors on the output. The frequency-selectable pulse-width modulator PWM allows the user to optimize the size and cost of the output filter. The MAX4295 is offered in a space-saving 16-pin QSOP package, and the MAX4297 is offered in a compact 24-pin SSOP package. Palmtop/Notebook Computers PDA Audio Sound Cards Game Cards Boom Boxes AC Amplifiers Battery-Powered Speakers Cordless Phones Portable Equipment o +2.7V to +5.5V Single-Supply Operation o 2W/Channel Output Power at 5V 0.7W/Channel Output Power at 3V o 87% Efficiency RL = PO = 2W, MAX4295 o THD+N RL = fOSC = 125kHz o Logic-Programmable PWM Frequency Selection 125kHz, 250kHz, 500kHz, 1MHz o Low-Power Shutdown Mode o Clickless Transitions Into and Out of Shutdown o 1A Current Limit and Thermal Protection o Available in Space-Saving Packages 16-Pin QSOP MAX4295 24-Pin SSOP MAX4297 PART MAX4295EEE MAX4295ESE MAX4297EAG MAX4297EWG Ordering Information TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 16 QSOP 16 Narrow SO 24 SSOP 24 Wide SO Pin Configurations appear at end of data sheet. Typical Operating Circuit INPUTL CIN RIN INPUTR CIN RIN VPVCC 1 AOUTL 2 INL RF 12 AOUTR 11 INR 22 SHDN 14 FS1 15 FS2 SS 24 CSS 4, 9, 16, 21 VPVCC MAX4297 OUT+L 5 OUT-L 20 L1A C1A L1B C1B 8 OUT+R L2A C2A OUT-R 17 VCM* 13 L2B C2B AGND 10 PGND 6, 7, 18, 19 *DO NOT CONNECT. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at Mono/Stereo 2W Switch-Mode Class-D Audio Power Amplifiers MAX4295/MAX4297 ABSOLUTE MAXIMUM RATINGS VCC, PVCC to GND or to +6V PGND to PVCC to VCC VCM, SS, AOUT_, IN_ ................................-0.3V to VCC + 0.3V SHDN, FS1, FS2 to +6V OUT_ _ to PVCC + 0.3V Op Amp Output Short-Circuit Duration AOUT_ .......Indefinite Short Circuit to Either Supply H-Bridge Short-Circuit Duration OUT_ _ .............Continuous Short Circuit to PGND, PVCC or between OUT+_ & OUT-_ Continuous Power Dissipation TA = +70°C 16-Pin QSOP derate 8.30mW/°C above +70°C ........667mW 24-Pin SSOP derate 9.50mW/°C above +70°C ........762mW 16-Pin Narrow SO derate 9.52mW/°C above +70°C ..........................696mW 24-Pin Wide SO derate 11.76mW/°C above +70°C ........................941mW Operating Temperature Range MAX4295E__/MAX4297E__ ............................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS VCC = PVCC = +5V, SHDN = VCC, FS1 = GND, FS2 = VCC fOSC = 250kHz , input amplifier gain = -1V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C. Note 1 PARAMETER CONDITIONS MIN TYP MAX UNITS GENERAL Supply Voltage Range Note 2 Quiescent Supply Current Output load not connected MAX4295 MAX4297 Shutdown Supply Current SHDN = GND MAX4295 MAX4297 Voltage at VCM Pin FS1 = GND, FS2 = GND PWM Frequency FS1 = GND, FS2 = VCC FS1 = VCC, FS2 = GND FS1 = VCC, FS2 = VCC 840 1000 1160 PWM Frequency Change with VCC Duty Cycle Duty Cycle Change with VCC Switch On-Resistance each power device H-Bridge Output Leakage VCC = 2.7V to 5.5V VIN = x VCC VIN = x VCC VIN = x VCC

PDF Datasheet Preview

MAX4295/MAX4297

Mono/Stereo 2W Switch-Mode Class-D Audio Power Amplifiers

The MAX4295/MAX4297 mono/stereo, switch-mode Class-D audio power amplifiers operate from a single +2.7V to +5.5V supply. They have >85% efficiency and are capable of delivering 2W continuous power to a load, making them ideal for portable multimedia and general-purpose high-power audio applications.

The MAX4295/MAX4297 feature a total harmonic distortion plus noise THD+N of fOSC = 125kHz , low quiescent current of 2.8mA MAX4295 or 4.6mA MAX4297 , high efficiency, and clickless power-up and shutdown. The SHDN input disables the device and limits supply current to <1.5µA MAX4295 or <2.3µA MAX4297 . Other features include a 1A current limit, thermal protection, and under-voltage lockout.

The MAX4295 mono and MAX4297 stereo reduce the number of required external components. Both devices have internal high-speed power-MOS transistors, allowing operation as bridge-tied load BTL amplifiers. The BTL configuration eliminates the need for isolation capacitors on the output. The frequency-selectable pulse-width modulator PWM allows the user to optimize the size and cost of the output filter.

The MAX4295 is offered in a space-saving 16-pin QSOP package, and the MAX4297 is offered in a compact 24-pin SSOP package.

Palmtop/Notebook Computers PDA Audio Sound Cards Game Cards

Boom Boxes AC Amplifiers Battery-Powered Speakers Cordless Phones Portable Equipment
o +2.7V to +5.5V Single-Supply Operation o 2W/Channel Output Power at 5V
0.7W/Channel Output Power at 3V o 87% Efficiency RL = PO = 2W, MAX4295 o THD+N RL = fOSC = 125kHz o Logic-Programmable PWM Frequency Selection
125kHz, 250kHz, 500kHz, 1MHz o Low-Power Shutdown Mode o Clickless Transitions Into and Out of Shutdown o 1A Current Limit and Thermal Protection o Available in Space-Saving Packages
16-Pin QSOP MAX4295 24-Pin SSOP MAX4297

PART MAX4295EEE MAX4295ESE MAX4297EAG MAX4297EWG
Ordering Information

TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C

PIN-PACKAGE 16 QSOP 16 Narrow SO 24 SSOP 24 Wide SO

Pin Configurations appear at end of data sheet.

Typical Operating Circuit

INPUTL

CIN RIN

INPUTR

CIN RIN

VPVCC
1 AOUTL
2 INL

RF 12 AOUTR
11 INR
22 SHDN 14 FS1
15 FS2 SS
24 CSS
4, 9,
16, 21

VPVCC

MAX4297

OUT+L 5 OUT-L 20

L1A C1A

L1B C1B
8 OUT+R

L2A C2A

OUT-R 17 VCM* 13

L2B C2B

AGND 10

PGND
6, 7, 18, 19
*DO NOT CONNECT.

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

Mono/Stereo 2W Switch-Mode Class-D Audio Power Amplifiers

MAX4295/MAX4297

ABSOLUTE MAXIMUM RATINGS

VCC, PVCC to GND or to +6V PGND to

PVCC to VCC VCM, SS, AOUT_, IN_ ................................-0.3V to VCC + 0.3V SHDN, FS1, FS2 to +6V

OUT_ _ to PVCC + 0.3V Op Amp Output Short-Circuit

Duration AOUT_ .......Indefinite Short Circuit to Either Supply

H-Bridge Short-Circuit

Duration OUT_ _ .............Continuous Short Circuit to PGND,

PVCC or between OUT+_ & OUT-_

Continuous Power Dissipation TA = +70°C 16-Pin QSOP derate 8.30mW/°C above +70°C ........667mW 24-Pin SSOP derate 9.50mW/°C above +70°C ........762mW 16-Pin Narrow SO derate 9.52mW/°C above +70°C ..........................696mW 24-Pin Wide SO derate 11.76mW/°C above +70°C ........................941mW

Operating Temperature Range MAX4295E__/MAX4297E__ ............................-40°C to +85°C

Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

VCC = PVCC = +5V, SHDN = VCC, FS1 = GND, FS2 = VCC fOSC = 250kHz , input amplifier gain = -1V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C. Note 1

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

GENERAL

Supply Voltage Range

Note 2

Quiescent Supply Current

Output load not connected

MAX4295 MAX4297

Shutdown Supply Current

SHDN = GND

MAX4295 MAX4297

Voltage at VCM Pin

FS1 = GND, FS2 = GND

PWM Frequency

FS1 = GND, FS2 = VCC FS1 = VCC, FS2 = GND FS1 = VCC, FS2 = VCC
840 1000 1160

PWM Frequency Change with VCC

Duty Cycle

Duty Cycle Change with VCC Switch On-Resistance each power device H-Bridge Output Leakage

VCC = 2.7V to 5.5V

VIN = x VCC

VIN = x VCC

VIN = x VCC

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Datasheet ID: MAX4297EAG 647336