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LM4960SQ Datasheet

  • LM4960SQ

  • National Semiconductor [Piezoelectric Speaker Driver]

  • 345.63KB

  • NSC

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LM4960 Piezoelectric Speaker Driver
October 2004
LM4960
Piezoelectric Speaker Driver
General Description
The LM4960 utilizes a switching regulator to drive a dual
audio power amplifier. It delivers 24V
P-P
mono-BTL to a
ceramic speaker with less than 1.0% THD+N while operating
on a 3.0V power supply.
The LM4960鈥檚 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 components. The LM4960 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
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
V
OUT
@
V
DD
= 3.0 THD+N
鈮?/div>
1%
n
Power supply range
n
Switching Frequency
24V
P-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鈥檚
Connection Diagram
LM4960SQ
20076582
Top View
Order Number LM4960SQ
See NS Package Number
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS200765
www.national.com

LM4960SQ 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Class-AB

  • 1-Channel Mono

  • 0.04 %

  • 3 V, 5 V

  • + 85 C

  • LLP EP

  • Reel

  • 20 Ohms

  • Single

  • - 40 C

  • Differential

  • Single

  • 7 V

  • 3 V

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