LM48311 Series

2.6-W, mono, analog input Class-D audio amplifier with 6 dB fixed gain

Catalog

2.6-W, mono, analog input Class-D audio amplifier with 6 dB fixed gain

Part	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Features	Mounting Type	Type	Max Output Power x Channels @ Load [custom]	Max Output Power x Channels @ Load	Output Type	Voltage - Supply [Min]	Voltage - Supply [Max]
Texas Instruments LM48311TL/NOPB	9-DSBGA	85 °C	-40 °C	9-WFBGA DSBGA	Depop Differential Inputs E2S Short-Circuit Protection Shutdown	Surface Mount	Class D	1	2.6 W	1-Channel (Mono)	2.4 V	5.5 V
Texas Instruments LM48311TLX/NOPB	9-DSBGA	85 °C	-40 °C	9-WFBGA DSBGA	Depop Differential Inputs E2S Short-Circuit Protection Shutdown	Surface Mount	Class D	1	2.6 W	1-Channel (Mono)	2.4 V	5.5 V

Catalog

2.6-W, mono, analog input Class-D audio amplifier with 6 dB fixed gain

Key Features

• Passes FCC Class B Radiated Emissions with 20 Inches of CableE2S System Reduces EMI while Preserving Audio Quality and EfficiencyOutput Short Circuit Protection with Auto-RecoveryNo output Filter RequiredInternally Configured Gain (6dB)Low power Shutdown ModeMinimum External Components"Click and Pop" SuppressionMicro-Power ShutdownAvailable in Space-Saving DSBGA PackageKey SpecificationsEfficiency at 3.6V, 400mW into 8Ω 85% (Typ)Efficiency at 5V, 1W into 8Ω 88% (Typ)Quiescent Power Supply Current at 5V 3.1mAPower Output at VDD= 5V, RL= 4ΩTHD+N ≤ 10% 2.6W (Typ)THD+N ≤ 1% 2.1W (Typ)Power Output at VDD= 5V, RL= 8ΩTHD+N ≤ 10% 1.6W (Typ)THD+N ≤ 1% 1.3W (Typ)Shutdown Current 0.01μA (Typ)Boomer is a trademark of Texas Instruments. All trademarks are the property of their respective owners.Passes FCC Class B Radiated Emissions with 20 Inches of CableE2S System Reduces EMI while Preserving Audio Quality and EfficiencyOutput Short Circuit Protection with Auto-RecoveryNo output Filter RequiredInternally Configured Gain (6dB)Low power Shutdown ModeMinimum External Components"Click and Pop" SuppressionMicro-Power ShutdownAvailable in Space-Saving DSBGA PackageKey SpecificationsEfficiency at 3.6V, 400mW into 8Ω 85% (Typ)Efficiency at 5V, 1W into 8Ω 88% (Typ)Quiescent Power Supply Current at 5V 3.1mAPower Output at VDD= 5V, RL= 4ΩTHD+N ≤ 10% 2.6W (Typ)THD+N ≤ 1% 2.1W (Typ)Power Output at VDD= 5V, RL= 8ΩTHD+N ≤ 10% 1.6W (Typ)THD+N ≤ 1% 1.3W (Typ)Shutdown Current 0.01μA (Typ)Boomer is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

Description

The LM48311 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48311 features Texas Instruments' Enhanced Emissions Suppression (E2S) system, that features a unique patent-pending ultra low EMI, spread spectrum, PWM architecture, that significantly reduces RF emissions while preserving audio quality and efficiency. The E2S system improves battery life, reduces external component count, board area consumption, system cost, and simplifying design. The LM48311 is designed to meet the demands of portable multimedia devices. Operating from a single 5V supply, the device is capable of delivering 2.6W of continuous output power to a 4Ω load with less than 10% THD+N. Flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48311 features both a spread spectrum modulation scheme, and an advanced, patented edge rate control (ERC) architecture that significantly reduces emissions, while maintaining high quality audio reproduction (THD+N = 0.03%) and high efficiency (η = 88%). The LM48311 features high efficiency compared to conventional Class AB amplifiers, and other low EMI Class D amplifiers. When driving and 8Ω speaker from a 5V supply, the device operates with 88% efficiency at PO= 1W. The gain of the LM48311 is internally set to 6dB, further reducing external component count. A low power shutdown mode reduces supply current consumption to 0.01µA. Advanced output short circuit protection with auto-recovery prevents the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM48311 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48311 features Texas Instruments' Enhanced Emissions Suppression (E2S) system, that features a unique patent-pending ultra low EMI, spread spectrum, PWM architecture, that significantly reduces RF emissions while preserving audio quality and efficiency. The E2S system improves battery life, reduces external component count, board area consumption, system cost, and simplifying design. The LM48311 is designed to meet the demands of portable multimedia devices. Operating from a single 5V supply, the device is capable of delivering 2.6W of continuous output power to a 4Ω load with less than 10% THD+N. Flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48311 features both a spread spectrum modulation scheme, and an advanced, patented edge rate control (ERC) architecture that significantly reduces emissions, while maintaining high quality audio reproduction (THD+N = 0.03%) and high efficiency (η = 88%). The LM48311 features high efficiency compared to conventional Class AB amplifiers, and other low EMI Class D amplifiers. When driving and 8Ω speaker from a 5V supply, the device operates with 88% efficiency at PO= 1W. The gain of the LM48311 is internally set to 6dB, further reducing external component count. A low power shutdown mode reduces supply current consumption to 0.01µA. Advanced output short circuit protection with auto-recovery prevents the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown.