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LM4817  Product Folder

1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO
Generic P/N 4817
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 85 
Channels (Channels) 2 
User Supply (Volt) 5 
Supply Range +2.7 - +5.5 V 
PowerAtFourOhms OnePercentTHD (Watt) - 
PowerAtEightOhms OnePercentTHD (Watt) 1.10 
PowerAtFourOhms TenPercentTHD (Watt) - 
PowerAtEightOhms TenPercentTHD (Watt) 1.50 
SNR (dB) 98 
SNR Conditions VDD 5V, Po 1W RL 8ohm 
PSRR (dB) 67 
PSRR Conditions 5V Vr=200Vrms RL 8ohm 
THD (%) .13 
THD Conditions RL 8ohm, Po 1W, Av=2 
Audio Mux No 

Datasheet

TitleSize in KbytesDate
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LM4817 Boomer ® Audio Power Amplifier Series 1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO 739 Kbytes 12-Nov-03 View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4817MHTSSOP EXP PAD28StatusFull productionN/AN/ASamples1K+$1.70rail
of
48		NSUZXYTT
LM4817MH
4-6 weeks10000
LM4817MHXTSSOP EXP PAD28StatusFull productionN/AN/A 
Buy Now		1K+$1.70reel
of
2500		NSUZXYTT
LM4817MH
8-10 weeks15000

General Description

The LM4817 combines a bridge-connected (BTL) stereo audio power amplifier with a low dropout voltage regulator (LDO). The audio amplifier delivers 1.0W to a 8 load with a less than 1.0% THD+N while operating on a 5V power supply. With VLIM set to 1.0V, the amplifier outputs are clamped to 6Vp-p, ±800mV.

With the LM4817's adjustable low-dropout (LDO) CMOS linear regulator delivers an output current of up to 300mA, has shutdown mode (1nA, typ) low quiescent current (90µA, typ) and LDO voltage (120mV, typ). The regulator is stable with small ceramic capacitive load (2.2µF, typ). The regulator includes regulation fault detection, a bandgap voltage reference, and constant current limiting. It is designed for low power, low current applications that can take advantage of its 300mA output current capability.

The LM4817 features an externally controlled micropower shutdown mode and thermal shutdown protection. It also utilizes circuitry that reduces "clicks and pops" during device turn-on and return from shutdown.

Boomer audio power amplifiers are designed specifically to use few external components and provide high quality output power in a surface mount package.

Features

  • Stereo BTL amplifier
  • Adjustable output voltage magnitude limiter
  • Adjustable LDO regulator
  • "Click and pop" suppression circuitry
  • LDO is stable with small-value ceramic output capacitors
  • Unity-gain stable audio amplifiers
  • LDO has over-current protection
  • Thermal shutdown protection circuitry
  • TSSOP (MH) package

Key Specification

PO (BTL): VDD = 5V, THD+N <= 1%, RL = 8

1.0W(typ)

Power supply range (amplifier)

3.0V to 5.0V

Power supply range (LDO)

2.5V to 6.0V

Shutdown current

0.07µA (typ)

LDO output current

300mA (min)

LDO dropout voltage (IOUT = 300mA)

120mV (typ)

LDO quiescent supply current

90µA (typ)

LDO shutdown supply current

1nA (typ)

LDO PSRR

60dB

LDO turn-on time

120ms (typ)

LDO ouput noise-voltage

37µVRMS (typ)

Applications

  • Multimedia monitors
  • Portable and desktop computers
  • Portable televisions

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM4817MHCMOS721420014108000005226190940
LM4817MHXCMOS721420014108000005226190940

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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