LM48520TL

• Click-inhibition
• Low 0.04μA shutdown current
• 78% efficiency
• Class D without filtering
• 2.7V - 5.0V operation
• 4 adjustable gain settings
• Adjustable output soft limiting swing limiter
• Horn protection
• Short-circuit protection in audio amplifiers
• Independent boost and amplifier shutdown pins

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The LM48520 integrates a high-efficiency Class D stereo audio power amplifier that provides a 5.0V (PV1) boost converter from a boost voltage supply of 2.7V to 5.0V when running up to 1W/ch to an 8Ω speaker at continuous power. The LM48520 uses a proprietary spread spectrum pulse width modulation technique to reduce the level of RF interference and electromagnetic interference. Class D amplifiers are low-noise, filter-PWM architectures that eliminate output filters, reduce external component count, board area, power consumption, system cost, and simplify design.

The LM48520 is designed for use in mobile phones and other portable communication devices. High efficiency (78%) extends battery life compared to boosting Class AB amplifiers. The LM48520 has a low-power shutdown mode. Shutdown enables the drive shutdown pin to be logic low (GND). In addition, by reducing external leakage through the control of the ground reference of the SW-OUT pin.

The LM48520 has 4 gain options that are selectable through Gain0 and gain 1 pin. Output short circuit prevents damage to the device under fault conditions. Superior click-and-pop suppression eliminates power-up and power-down sound transients.

Main specifications

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• mobile phone
• Pocket PC
• Portable media
• camera
• Handheld game consoles