LM4960SQ National Semiconductor, LM4960SQ Datasheet

AMP, FOR CERAMSPEAKER, MINI SOIC8

LM4960SQ

Manufacturer Part Number
LM4960SQ
Description
AMP, FOR CERAMSPEAKER, MINI SOIC8
Manufacturer
National Semiconductor
Datasheet

Specifications of LM4960SQ

Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono
Audio Amplifier Function
Speaker
Total Harmonic Distortion
0.04@20Ohm%
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
60dB
Single Supply Voltage (min)
3V
Single Supply Voltage (max)
7V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
28
No. Of Channels
1
Supply Voltage Range
3V To 7V
Thd + N
0.04% @ 3W, VDD=5V
Load Impedance
20ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
LLP
No. Of Pins
28
Svhc
No SVHC
Rohs Compliant
Yes
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4960SQ
Manufacturer:
PH
Quantity:
4 416
Part Number:
LM4960SQ/NOPB
Manufacturer:
NS
Quantity:
339
© 2005 National Semiconductor Corporation
LM4960
Piezoelectric Speaker Driver
General Description
The LM4960 utilizes a switching regulator to drive a dual
audio power amplifier. It delivers 24V
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 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.
Connection Diagram
Boomer
®
is a registered trademark of National Semiconductor Corporation.
P-P
DS200765
mono-BTL to a
Order Number LM4960SQ
See NS Package Number
LM4960SQ
Top View
Key Specifications
n V
n Power supply range
n Switching Frequency
Features
n Low current shutdown mode
n "Click and pop" suppression circuitry
n Low Quiescent current
n Unity-gain stable audio amplifiers
n External gain configuration capability
n Thermal shutdown protection circuitry
n Wide input voltage range (3.0V - 7V)
n 1.6MHz switching frequency
Applications
n Mobile phone
n PDA’s
OUT
@
V
DD
= 3.0 THD+N ≤ 1%
20076582
www.national.com
1.6MHz (typ)
24V
April 2005
3.0 to 7V
P-P
(typ)

Related parts for LM4960SQ

LM4960SQ Summary of contents

Page 1

... External gain configuration capability n Thermal shutdown protection circuitry n Wide input voltage range (3.0V - 7V) n 1.6MHz switching frequency Applications n Mobile phone n PDA’s LM4960SQ Top View Order Number LM4960SQ See NS Package Number DS200765 April 2005 = 3.0 THD+N ≤ 1% 24V P-P 3 1.6MHz (typ) 20076582 www ...

Page 2

Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com 2 20076581 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Supply Voltage (V1) (Pin 27 referred to GND) Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Electrical Characteristics V ...

Page 4

Electrical Characteristics V Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and ...

Page 5

Typical Performance Characteristics THD+N vs Frequency 9.6V THD+N vs Frequency 15V THD+N vs Frequency V = 5V, V =12V 3Vrms ...

Page 6

Typical Performance Characteristics THD+N vs Output Power 9.6V 100Hz, 1kHz, 10kHz THD+N vs Output Power 15V 100Hz, 1kHz, 10kHz THD+N vs Output ...

Page 7

Typical Performance Characteristics Power Dissipation vs Output Voltage V = 3V, from top to bottom 15V 12V Supply Current vs Supply Voltage from top to bottom 15V ...

Page 8

... This plane forms a thermal mass, heat sink, and radiation area. Further detailed and specific information con- cerning PCB layout, fabrication, and mounting an LD (LLP) package is found in National Semiconductor’s Package En- gineering Group under application note AN1187 ...

Page 9

Application Information SHUTDOWN FUNCTION In many applications, a microcontroller or microprocessor output is used to control the shutdown circuitry to provide a quick, smooth transition into shutdown. Another solution is to use a single-pole, single-throw switch, and a pull-up resistor. ...

Page 10

Application Information SETTING THE OUTPUT VOLTAGE (V CONVERTER The output voltage is set using the external resistors R1 and R2 (see Figure 1). A value of approximately 13.3kΩ is rec- ommended for R2 to establish a divider current of approxi- ...

Page 11

Application Information CALCULATING OUTPUT CURRENT OF BOOST CONVERTER (I ) AMP As shown in Figure 2 which depicts inductor current, the load current is related to the average inductor current by the relation (AVG ...

Page 12

... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 LLP, Plastic, Quad Order Number LM4960SQ NS Package Number SQA28A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

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