LM48312 Series

2.6-W, mono, analog input Class-D audio amplifier with selectable gain & EMI suppression

Catalog

2.6-W, mono, analog input Class-D audio amplifier with selectable gain & EMI suppression

Part	Type	Output Type	Max Output Power x Channels @ Load [custom]	Max Output Power x Channels @ Load	Package / Case	Voltage - Supply [Min]	Voltage - Supply [Max]	Features	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package
Texas Instruments LM48312TLE/NOPB	Class D	1-Channel (Mono)	1	2.6 W	9-WFBGA DSBGA	2.4 V	5.5 V	Depop Differential Inputs E2S Short-Circuit Protection Shutdown	Surface Mount	85 °C	-40 °C	9-DSBGA
Texas Instruments LM48312TLX/NOPB	Class D	1-Channel (Mono)	1	2.6 W	9-WFBGA DSBGA	2.4 V	5.5 V	Depop Differential Inputs E2S Short-Circuit Protection Shutdown	Surface Mount	85 °C	-40 °C	9-DSBGA

Catalog

2.6-W, mono, analog input Class-D audio amplifier with selectable gain & EMI suppression

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 RequiredImproved Audio QualityMinimum External ComponentsFive Logic Selectable Gain Settings (0, 3, 6, 9, 12dB)Low Power Shutdown ModeClick and Pop SuppressionAvailable in Space-Saving DSBGA PackageKey SpecificationsEfficiency at 3.6V, 400mW into 8Ω, 84% (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 RequiredImproved Audio QualityMinimum External ComponentsFive Logic Selectable Gain Settings (0, 3, 6, 9, 12dB)Low Power Shutdown ModeClick and Pop SuppressionAvailable in Space-Saving DSBGA PackageKey SpecificationsEfficiency at 3.6V, 400mW into 8Ω, 84% (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 LM48312 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48312 features TI’s Enhanced Emissions Suppression (E2S) system, that features a unique patented 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, and system cost, simplifying design. The LM48312 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 LM48312 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 LM48312 features high efficiency compared to conventional Class AB amplifiers, and other low EMI Class D amplifiers. When driving an 8Ω speaker from a 5V supply, the device operates with 88% efficiency at PO= 1W. The LM48312 features five gain settings, selected through a single logic input, further reducing solution size. 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 LM48312 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48312 features TI’s Enhanced Emissions Suppression (E2S) system, that features a unique patented 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, and system cost, simplifying design. The LM48312 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 LM48312 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 LM48312 features high efficiency compared to conventional Class AB amplifiers, and other low EMI Class D amplifiers. When driving an 8Ω speaker from a 5V supply, the device operates with 88% efficiency at PO= 1W. The LM48312 features five gain settings, selected through a single logic input, further reducing solution size. 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.