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LM4855

Features: ` 1.1W (typ) output power with 8 mono BTL load` 115mW (typ) output power with stereo 32 BTL loads` SPI programmable 32 step digital volume control` Eight distinct output modes` micro-SMD and LLP surface mount packaging` Click and Pop suppression circuitry` Thermal shutdown protection` ...

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SeekIC No. : 004395812 Detail

LM4855: Features: ` 1.1W (typ) output power with 8 mono BTL load` 115mW (typ) output power with stereo 32 BTL loads` SPI programmable 32 step digital volume control` Eight distinct output modes` micro-SMD a...

LM4855 Data Sheet

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Part Number:
LM4855
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/5/22

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Product Details

Description



Features:

` 1.1W (typ) output power with 8 mono BTL load
` 115mW (typ) output power with stereo 32 BTL loads
` SPI programmable 32 step digital volume control
` Eight distinct output modes
` micro-SMD and LLP surface mount packaging
` "Click and Pop" suppression circuitry
` Thermal shutdown protection
` Low shutdown current (0.1uA, typ)




Application

· Moblie Phones
· PDAs




Pinout

Connection Diagram




Specifications

Power@ 4Ohms, 10% THD Undefined Watt
Power@ 4Ohms, 1% THD Undefined Watt
Power@ 8Ohms, 10% THD 1.4 Watt
Power@ 8Ohms, 1% THD 1.1 Watt
THD 0.5 %
PSRR 57 dB
SNR 100 dB
Channels 3 Channels
THD Conditions Pout=.4W @ Vs=5V, RL=8 Ohms, 20Hz-20kHz
PSRR Conditions 217 Hz, terminated into 50 Ohms
SNR Conditions Undefined
User Supply 5 Volt
Audio Mux Yes
Capless Headphone No
ClassD Driver No
Interface SPI
Stereo Inputs 1
National 3D No
Digital Volume Control Max 6 dB
Digital Volume Control Min -40.5 dB
Output Modes 8
Supply Range +2.6 - +5 V
Mono Inputs 2
Temperature Min -40 deg C
Temperature Max 85 deg C
Loudspeaker Type Class AB
Headphone Type Cap Coupled
Loudspeaker Outputs 1
View Using Catalog


Supply Voltage ....................6.0V
Storage Temperature ....... −65°C to +150°C
Input Voltage ...........−0.3V to VDD +0.3V
Power Dissipation (Note 3) Internally Limited
ESD Susceptibility (Note 4) ........... 5000V
ESD Susceptibility (Note 5) ............250V
Junction Temperature .............. 150°C
Soldering Information
Small Outline Package
Vapor Phase (60 sec.) ..............215°C
Infrared (15 sec.)................ 220°C
Thermal Resistance
JA (typ) - LQA24A ...............42°C/W
JC (typ) - LQA24A .............. 3.0°C/W
JA (typ) - BLA18AAB ........48°C/W (Note 9)
JC (typ) - BLA18AAB ........23°C/W (Note 9)
JA (typ) - TLA18AAA ........48°C/W (Note 9)
JC (typ) - TLA18AAA ........ 23°C/W (Note 9





Description

The LM4855 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a
mono 8 bridged-tied load (BTL) with 1% THD+N and 115mW (typ) per channel of continuous average power into stereo 32 BTL loads with 0.5% THD+N, using a 5V power supply.

The LM4855 features a 32 step digital volume control and eight distinct output modes. The digital volume control and output modes are programmed through a three-wire SPI serial control interface, that allows flexibility in routing and mixing audio channels.

The LM4855 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only six external components.

The industry leading micro SMD package only utilizes 2mm x 2.3mm of PCB space, making the LM4855 the most space efficient audio sub system available today.






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