LM48556TLX/NOPB National Semiconductor, LM48556TLX/NOPB Datasheet

IC AMP AUDIO PWR MONO AB 12USMD

LM48556TLX/NOPB

Manufacturer Part Number
LM48556TLX/NOPB
Description
IC AMP AUDIO PWR MONO AB 12USMD
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM48556TLX/NOPB

Output Type
1-Channel (Mono)
Voltage - Supply
2.7 V ~ 4.5 V
Features
Depop, Differential Inputs, Shutdown
Mounting Type
Surface Mount
Package / Case
12-MicroSMD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Max Output Power X Channels @ Load
-
Other names
LM48556TLX
© 2008 National Semiconductor Corporation
LM48556
Fully Differential, Mono, Ceramic Speaker Driver
General Description
The LM48556 is a single supply, mono, ceramic speaker driv-
er with an integrated charge-pump, designed for portable
devices, such as cell phones, where board space is at a pre-
mium. The LM48556 charge pump allows the device to deliver
17.5V
charge pump features a soft start function that minimizes
transient current during power-up.
The LM48556 features high power supply rejection ratio
(PSRR) of 80dB at 217Hz, allowing the device to operate in
noisy environments without additional power supply condi-
tioning. Flexible power supply requirements allow operation
from 2.7V to 5.0V. Additionally, the LM48556 features a dif-
ferential input function and an externally configurable gain. A
low power shutdown mode reduces supply current consump-
tion to 0.1μA.
Superior click and pop suppression eliminates audible tran-
sients on power-up/down and during shutdown. The
LM48556 is available in an ultra-small 12-bump micro SMD
package (2mm x 1.5mm).
Boomer
®
PP
is a registered trademark of National Semiconductor Corporation.
(typ) from a single 4.5V supply. Additionally, the
300572
Key Specifications
Features
Applications
■ 
■ 
■ 
■ 
Fully differential amplifier
Externally configurable gain
Integrated charge pump
Low power shutdown mode
Soft start function
Mobile phones
PDA's
Digital cameras
Output Voltage Swing
Power Supply Rejection Ratio
I
Wake-Up Time
DD
V
V
f = 217Hz, V
DD
DD
at V
= 3.6V, 1kHz
= 4.5V, 1kHz
DD
= 3.6V
DD
= 3.6V
December 10, 2008
14.2V
17.5V
www.national.com
4.8mA (typ)
0.5ms (typ)
80dB (typ)
PP
PP
(typ)
(typ)

Related parts for LM48556TLX/NOPB

LM48556TLX/NOPB Summary of contents

Page 1

... Superior click and pop suppression eliminates audible tran- sients on power-up/down and during shutdown. The LM48556 is available in an ultra-small 12-bump micro SMD package (2mm x 1.5mm). Boomer ® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Key Specifications ■  Output Voltage Swing ...

Page 2

Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 300572d4 ...

Page 3

Connection Diagrams 12 Bump micro SMD Top View Order Number LM48556TL, LM48556TLX See NS Package Number TLA121AA 12 Bump micro SMD Package View 3 300572d6 30057231 www.national.com ...

Page 4

Bump Descriptions Bump Ordering Information Order Number Package 12 bump micro LM48556TL SMD 12 bump micro LM48556TLX SMD www.national.com LM48556TL Marking Top View XY = Date Code TT ...

Page 5

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( (Note 1) Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Rating(Note 4) ESD Rating (Note 5) Electrical Characteristics V The following specifications apply for V specified. Limits apply for T = 25° ...

Page 6

Symbol Parameter PSRR Power Supply Rejection Ratio CMRR Common Mode Rejection Ratio V Logic High Threshold Voltage LH V Logic Low Threshold Voltage LL Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including ...

Page 7

Typical Performance Characteristics = 15Ω+1μ 20dB 22kHz THD+N vs Frequency V = 2.7V THD+N vs Frequency V = 4.5V 17. THD+N vs Output ...

Page 8

CMRR vs Frequency V = 2.7V, Input referred DD CMRR vs Frequency V = 4.5V, Input referred DD PSRR vs Frequency V = 3.6V, Input referred DD www.national.com CMRR vs Frequency V = 3.6V, Input referred DD 300572d0 PSRR vs ...

Page 9

Output Voltage vs Frequency V = 2.7V, THD Output Voltage vs Frequency V = 4.5V, THD Power Consumption vs Output Voltage Swing ≤ 2.7V, THD Output Voltage vs Frequency V ...

Page 10

Power Consumption vs Output Voltage Swing ≤ 4.5V, THD 300572e6 ...

Page 11

Application Information GENERAL AMPLIFIER FUNCTION The LM48556 is a fully differential ceramic speaker driver that utilizes National’s inverting charge pump technology to deliv- er the high drive voltages required by ceramic speakers, without the need for noisy, board-space consuming inductive ...

Page 12

R C (Hz Where the value determined by equation (1) in the IN Gain Setting Resistor Selection section. When the LM48556 is using a single-ended source, power supply noise ...

Page 13

Bill Of Materials Component Description LM48556TL LM48556TL 4.7μF, ceramic, low ESR (<0.1Ω) 16V, Capacitor -40°C to +85°C 82μF, 16V, -40°C to +85°C Capacitor 82μF, 16V, -40°C to +85°C Capacitor 0.47μF, 16V, -40°C to +85° Capacitor 0.47μF, 16V, -40°C to +85°C ...

Page 14

Demonstration Board Schematic www.national.com FIGURE 3: Demo Board Schematic 14 300572b0 ...

Page 15

Demonstration Board PCB Views FIGURE 4: Top Overlay FIGURE 5: Top Layer 15 300572b6 300572b5 www.national.com ...

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FIGURE 6: Mid Layer 1 FIGURE 7: Mid Layer 2 16 300572b3 300572b4 ...

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FIGURE 8: Bottom Overlay FIGURE 9: Bottom Layer 17 300572b2 300572b1 www.national.com ...

Page 18

Revision History Rev Date 1.0 06/03/08 1.01 12/09/08 www.national.com Description Initial release. Changed Power Supply Voltage Limits from 4.5V to 5.0V. 18 ...

Page 19

Physical Dimensions inches (millimeters) unless otherwise noted 12 Bump micro SMD Order Number LM48556TL, LM48556TLX NS Package Number TLA121AA = 1488μ 1996μm, = 600μ www.national.com ...

Page 20

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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