LM4960 Datasheet | National Semiconductor

Description The LM4960 utilizes a switching regulator to drive a dual audio power amplifier. It delivers 24VP-P mono-BTL to a ceramic speaker with less than 1.0% THD+N while operating on a 3.0V power supply. The LM4960’s switching regulator is a current-mode boost converter operating at a fixed frequency of 1.6MHz. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents. The LM4960 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. The LM4960 features a low-power consumption externally controlled micropower shutdown mode. Additionally, the LM4960 features and internal thermal shutdown protection mechanism along with a short circuit protection. The LM4960 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications n VOUT @ VDD = 3.0 THD+N ≤ 1% n Power supply range n Switching Frequency 24VP-P (typ) 3.0 to 7V 1.6MHz (typ) Features n n n n n n n n n Stereo BTL amplifier Low current shutdown mode "Click and pop" suppression circuitry Low Quiescent current Unity-gain stable audio amplifiers External gain configuration capability Thermal shutdown protection circuitry Wide input voltage range (3.0V - 7V) 1.6MHz switching frequency Applications n Mobile phone n PDA’s Connection Diagram LM4960SQ Top View Order Number LM4960SQ See NS Package Number Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200765 .national. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit .national. Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and...