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LM4857

Features: · Stereo speaker amplifier· Stereo headphone amplifier· Mono earpiece amplifier· Mono Line Output for external handsfree carkit· Independent Left, Right, and Mono volume controls· National 3D enhancement· I2C compatible interface· Ultra low shutdown current· Click and Pop Suppression cir...

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SeekIC No. : 004395814 Detail

LM4857: Features: · Stereo speaker amplifier· Stereo headphone amplifier· Mono earpiece amplifier· Mono Line Output for external handsfree carkit· Independent Left, Right, and Mono volume controls· National...

LM4857 Data Sheet

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Part Number:
LM4857
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: 2024/12/21

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Product Details

Description



Features:

· Stereo speaker amplifier
· Stereo headphone amplifier
· Mono earpiece amplifier
· Mono Line Output for external handsfree carkit
· Independent Left, Right, and Mono volume controls
· National 3D enhancement
· I2C compatible interface
· Ultra low shutdown current
· Click and Pop Suppression circuit
· 16 distinct output modes
· Thermal Shutdown Protection
· Available in micro SMD and LLP packages


Application

· Cell Phones
· PDAs
· Portable Gaming Devices
· Internet Appliances
· Portable DVD/CD/AAC/MP3 players


Pinout

Connection Diagram


Specifications

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) ........2000V
ESD Susceptibility (Note 5) ........  200V
Junction Temperature (TJ) ........ 150°C
Thermal Resistance
JA (TLA30CZA) (Note 10) ....... 62°C/W
JA (SPA28A) (Note 12) ........  42°C/W
JC (SPA28A) ................3°C/W


Description

The LM4857 is an integrated audio sub-system designed for stereo cell phone applications. Operating on a 3.3V supply, it combines a stereo speaker amplifier delivering 495mW per channel into an 8 load, a stereo headphone amplifier delivering 33mW per channel into a 32 load, a mono earpieceamplifier delivering 43mW into a 32 load, and a line outputfor an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and National 3D enhancement all into a single package. In addition, the LM4857 routes and mixes the stereo and mono inputs into 16 distinct output modes. The LM4857 is controlled through an I2C compatible interface. Other features include an ultra-low current shutdown mode and thermal shutdown protection.

Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.

The LM4857 is available in a 30-bump ITL package and a 28lead LLP package.




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