LM48520 Series

2.7-W, stereo, analog input Class-D audio amp with integrated boost & EMI spread spectrum

Catalog

2.7-W, stereo, analog input Class-D audio amp with integrated boost & EMI spread spectrum

Part	Package / Case	Output Type	Max Output Power x Channels @ Load	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Type	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Features	Supplied Contents	Board Type	Utilized IC / Part
Texas Instruments LM48520TLX/NOPB	25-WFBGA DSBGA	2-Channel (Stereo)	1.3 W 2 channels	25-DSBGA	2.4 V	5.5 V	Class D	85 °C	-40 °C	Surface Mount	Depop Differential Inputs Short-Circuit Protection Shutdown
Texas Instruments LM48520TLBD		2-Channel (Stereo)	1.3 W 2 channels		2.4 V	5.5 V						Board(s)	Fully Populated	LM48520
Texas Instruments LM48520TLE/NOPB	25-WFBGA DSBGA	2-Channel (Stereo)	1.3 W 2 channels	25-DSBGA	2.4 V	5.5 V	Class D	85 °C	-40 °C	Surface Mount	Depop Differential Inputs Short-Circuit Protection Shutdown
Texas Instruments LM48520TL/NOPB	25-WFBGA DSBGA	2-Channel (Stereo)	1.3 W 2 channels	25-DSBGA	2.4 V	5.5 V	Class D	85 °C	-40 °C	Surface Mount	Depop Differential Inputs Short-Circuit Protection Shutdown

Catalog

2.7-W, stereo, analog input Class-D audio amp with integrated boost & EMI spread spectrum

Key Features

• Click and Pop SuppressionLow 0.04μA Shutdown Current78% EfficiencyFilterless Class D2.7V - 5.0V Operation4 Adjustable Gain SettingsAdjustable Output Swing Limiter with Soft ClippingSpeaker ProtectionShort Circuit Protection on Audio AmpsIndependent Boost and Amplifier Shutdown PinsKey SpecificationsQuiescent Power Supply Current: 11.5 mA(typ)Output Power (RL= 8Ω, THD+N ≤ 1%,VDD= 3.3V,PV1 = 5.0V): 1.1 W(typ)Shutdown Current: 0.04 μA(typ)All trademarks are the property of their respective owners.Click and Pop SuppressionLow 0.04μA Shutdown Current78% EfficiencyFilterless Class D2.7V - 5.0V Operation4 Adjustable Gain SettingsAdjustable Output Swing Limiter with Soft ClippingSpeaker ProtectionShort Circuit Protection on Audio AmpsIndependent Boost and Amplifier Shutdown PinsKey SpecificationsQuiescent Power Supply Current: 11.5 mA(typ)Output Power (RL= 8Ω, THD+N ≤ 1%,VDD= 3.3V,PV1 = 5.0V): 1.1 W(typ)Shutdown Current: 0.04 μA(typ)All trademarks are the property of their respective owners.

Description

The LM48520 integrates a boost converter with a high efficiency Class D stereo audio power amplifier to provide up to 1W/ch continuous power into an 8Ω speaker when operating from 2.7V to 5.0V power supply with boost voltage (PV1) of 5.0V. The LM48520 utilizes a proprietary spread spectrum pulse width modulation technique that lowers RF interference and EMI levels. The Class D amplifier is a low noise, filterless PWM architecture that eliminates the output filter, reducing external component count, board area, power consumption, system cost, and simplifying design. The LM48520 is designed for use in mobile phones and other portable communication devices. The high (78%) efficiency extends battery life when compared to Boosted Class AB amplifiers. The LM48520 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND). Also, external leakage is minimized via control of the ground reference via the SW-OUT pin . The LM48520 has 4 gain options which are pin selectable via Gain0 and Gain1 pins. Output short circuit prevents the device from damage during fault conditions. Superior click and pop suppression eliminates audible transients during power-up and shutdown. The LM48520 integrates a boost converter with a high efficiency Class D stereo audio power amplifier to provide up to 1W/ch continuous power into an 8Ω speaker when operating from 2.7V to 5.0V power supply with boost voltage (PV1) of 5.0V. The LM48520 utilizes a proprietary spread spectrum pulse width modulation technique that lowers RF interference and EMI levels. The Class D amplifier is a low noise, filterless PWM architecture that eliminates the output filter, reducing external component count, board area, power consumption, system cost, and simplifying design. The LM48520 is designed for use in mobile phones and other portable communication devices. The high (78%) efficiency extends battery life when compared to Boosted Class AB amplifiers. The LM48520 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND). Also, external leakage is minimized via control of the ground reference via the SW-OUT pin . The LM48520 has 4 gain options which are pin selectable via Gain0 and Gain1 pins. Output short circuit prevents the device from damage during fault conditions. Superior click and pop suppression eliminates audible transients during power-up and shutdown.