LM4734 Datasheet | National Semiconductor

Description The LM4734 is a three channel audio amplifier capable of typically delivering 20W per channel of continuous average output power into a 4Ω or 8Ω load with less than 10% THD+N from 20Hz - 20k Hz. The LM4734 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150˚C. The LM4734 also has an under voltage lock out feature for click and pop free power on and off. Each amplifier of the LM4734 has an independent smooth transition fade-in/out mute and a power conserving standby mode. The mute and standby modes can be controlled by external logic. The LM4734 has a wide supply operating supply range from ± 10V - ± 30V allowing for lower cost unregulated power supplies to be used. The LM4734 can easily be configured for bridge or parallel operation for higher power and bi-amp solutions. Key Specifications j Output Power/Channel with 10% THD+N, 1k Hz into 4Ω or 8Ω j THD+N at 3x1W into 8Ω, 1k Hz j Mute Attenuation j PSRR j Slew Rate 20W (typ) 0.03% (typ) 110d B (typ) 64d B (typ) 18V/µs (typ) Features n n n n Low external ponent count Quiet fade-in/out mute mode Low power standby mode Wide supply range: 20V - 60V Applications n n n n Audio Audio Audio Audio amplifier amplifier amplifier amplifier for for for for ponent stereo pact stereo home theater in a box (HTB) high-end and HD TVs Typical Application 200898D2 FIGURE 1. Typical Audio Amplifier Application Circuit SPi Ke™ Protection and Overture™ are trademarks of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200898 .national. Data Sheet 4 U . .. Connection Diagrams Plastic Package (Note 13) 200898I4 Top View Order Number LM4734TA See NS Package Number TA27A TO-220 Top Marking 200898I5 Top View U - Wafer Fab Code Z - Assembly Plant Code XY - Date Code TT - Die Run Traceability L4734TA - LM4734TA .national. Data Sheet 4 U . .. Absolute Maximum Ratings 2) (Notes 1, Soldering Information TA...