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LM4951ASD/NOPB
Wide Voltage Range 1.8 Watt Audio Power Amplifier With Short Circuit Protection
LM4951A
www.ti.com SNAS453C –AUGUST 2008–REVISED APRIL 2013
LM4951A Wide Voltage Range 1.8 Watt Audio Amplifier
With Short Circuit Protection
Checkfor Samples: LM4951A
1FEATURES DESCRIPTIONThe LM4951Ais an audio power amplifier designed
23• Pop& Click Circuitry Eliminates Noise During for applications with supply voltages ranging from
Turn-On and Turn-Off Transitions 2.7V upto 9V. The LM4951Ais capableof delivering
• Wide Supply Voltage Range: 2.7Vto 9V 1.8W continuous average power with less than 1%
Low Current, Active-Low Shutdown Mode THD+N intoa bridge connected 8Ω load when
operating froma 7.5VDC power supply.
• Low Quiescent CurrentBoomer™ audio power amplifiers were designed
• Thermal Shutdown Protectionspecificallyto provide high quality output power witha
• Short Circuit Protection minimal amount of external components. The
• Unity-Gain Stable LM4951A does not require bootstrap capacitors,or
External Gain Configuration Capability snubber circuits.
The LM4951A featuresa low-power consumption
APPLICATIONS active-low shutdown mode. Additionally, the
LM4951A features an internal thermal shutdown
• Portable Devicesprotection mechanism and short circuit protection.
• Cell PhonesThe LM4951A contains advanced pop& click circuitry
• Laptop Computers that eliminates noises which would otherwise occur
• Computer Speaker Systems during turn-on and turn-off transitions.
• MP3 Player Speakers The LM4951A is unity-gain stable and can be
configuredby external gain-setting resistors.
KEY SPECIFICATIONS Wide Voltage Range 2.7Vto 9V Quiescent Power Supply Current (VDD= 7.5V)
2.5mA (typ) Power Output BTLat 7.5V, 1% THD
1.8W (typ) Shutdown Current 0.01µA (typ) 25ms (typ)