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LM4879

Features: No output coupling capacitors, snubber networks or bootstrap capacitors requiredUnity gain stableUltra low current shutdown modeFast turn on: 80ms (typ), 110ms (max) with 1.0F capacitorBTL output can drive capacitive loads up to 100pFAdvanced pop & click circuitry eliminates noises d...

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SeekIC No. : 004395838 Detail

LM4879: Features: No output coupling capacitors, snubber networks or bootstrap capacitors requiredUnity gain stableUltra low current shutdown modeFast turn on: 80ms (typ), 110ms (max) with 1.0F capacitorBTL...

LM4879 Data Sheet

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Part Number:
LM4879
Supply Ability:
5000

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

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Product Details

Description



Features:

No output coupling capacitors, snubber networks or bootstrap capacitors required
Unity gain stable
Ultra low current shutdown mode
Fast turn on: 80ms (typ), 110ms (max) with 1.0F capacitor
BTL output can drive capacitive loads up to 100pF
Advanced pop & click circuitry eliminates noises during turn-on and turn-off transitions
2.2V - 5.0V operation
Available in space-saving SMD, LLP, and MSOP packages




Application

Mobile Phones
PDAs
Portable electronic devices




Pinout

Connection Diagram




Specifications

Power@ 8Ohms, 1% THD 1.1 Watt
Power@ 8Ohms, 10% THD 1.2 Watt
THD 0.1 %
PSRR 68 dB
Channels 1 Channels
THD Conditions f=1kHz, Po = 0.5Wrms
PSRR Conditions Vripple = 0.2Vpp sine, CB=1.0uF. Input terminated with 10ohms to ground. F = 1kHz
User Supply 5 Volt
Shutdown Type Low
Temperature Min -40 deg C
Temperature Max 85 deg C
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Supply Voltage (Note 9)............................................. 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 ..............................................150°C
Thermal Resistance
JA (BPA08DDB) ..................................220°C/W (Note 10)
JA (SDC08A) ........................................64°C/W (Note 12)
JA (TLA09AAA) ...................................180°C/W (Note 10)
JA (BLA09AAB)................................... 180°C/W (Note 10)
JC (MUB10A)....................................................... 56°C/W
JA (MUB10A) ......................................................190°C/W




Description

The LM4879 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.1 watt of continuous average power to an 8 BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4879 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for lower-power portable applications where minimal space and power consumption are primary requirements.

The LM4879 features a low-power consumption global shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4879 features an internal thermal shutdown protection mechanism.

The LM4879 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4879 is unity-gain stable and can be configured by external gain-setting resistors.






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