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Data Sheet

FULL DATA SHEET (PDF, 544kB) Download   E-Mail

Description

The MAX4295 mono, switch-mode (Class D) audio power amplifier operates from a single +2.7V to +5.5V supply. The MAX4295 has >85% efficiency and is capable of delivering 2W continuous power to a 4Ω load, making it ideal for portable multimedia and general- purpose high-power audio applications. The MAX4295 features a total harmonic distortion plus noise (THD+N) of 0.4% (fOSC = 125kHz), low quiescent current of 2.8mA, high efficiency, and clickless power-up and shutdown. The active-low SHDN input disables the device and limits supply current to <1.5µA. Other features include a 1A current limit, thermal protection, and undervoltage lockout. The MAX4295 reduces the number of required external components. Internal high-speed power-MOS transistors allow operation as a bridge-tied load (BTL) amplifier. 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 or narrow SO package.

Key Features		Applications/Uses
+2.7V to +5.5V Single-Supply Operation 2W/Channel Output Power at 5V 0.7W/Channel Output Power at 3V 87% Efficiency (RL = 4Ω, POUT = 2W) 0.4% THD+N (RL = 4Ω, fOSC = 125kHz) Logic-Programmable PWM Frequency Selection (125kHz, 250kHz, 500kHz, 1MHz) Low-Power Shutdown Mode Clickless Transitions Into and Out of Shutdown 1A Current Limit and Thermal Protection Available in Space-Saving Packages 16-Pin QSOP or Narrow SO		AC Amplifiers Battery-Powered Speakers Boom Boxes Cordless Phones Game Cards Palmtop/Notebook Computers PDA Audio Portable Equipment Sound Cards

Diagram

Typical Operating Circuit

Application Notes

Application Note 624: Class D Audio Amplifier Output Filter Optimization - MAX4295 Application Note 1760: Class D Audio Amplifiers Save Battery Life - MAX4295 Application Note 1951: Class-D Motor-Speed Control - MAX4295

Evaluation Kits

MAX4295EVKIT

Design Guides

AMPLIFIERS/COMPARATORS (PDF)

Reliability Reports

Show FIT data for: MAX4295 Reliability Report: MAX4295ExE.pdf

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-8 of 8
MAX4295	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4295EEE			QSOP;16 pin;31 mm² Dwg: 21-0055G (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4295EEE-T			QSOP;16 pin;31 mm² Dwg: 21-0055G (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4295EEE+			QSOP;16 pin;31 mm² Dwg: 21-0055G (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4295EEE+T			QSOP;16 pin;31 mm² Dwg: 21-0055G (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4295ESE			SOIC;16 pin;62 mm² Dwg: 21-0041B (PDF) Use pkgcode/variation: S16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4295ESE-T			SOIC;16 pin;62 mm² Dwg: 21-0041B (PDF) Use pkgcode/variation: S16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4295ESE+			SOIC;16 pin;62 mm² Dwg: 21-0041B (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4295ESE+T			SOIC;16 pin;62 mm² Dwg: 21-0041B (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2000-11-09

Related Products

MAX4298, MAX4299 Ultra-High PSRR Stereo Drivers + Microphone Amp + 100mA Linear Regulator

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