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National Semiconductor Electronic Components Datasheet

LM4919 Datasheet

1.5V/ Mono 85mW BTL Output/ 14mW Stereo Headphone Audio Amplifier

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May 2004
LM4919
1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone
Audio Amplifier
General Description
The unity gain stable LM4919 is both a mono-BTL audio
power amplifier and a Single Ended (SE) stereo headphone
amplifier. Operating on a single 1.5V supply, the mono BTL
mode delivers 85mW into an 8load at 1% THD+N. In
Single Ended stereo headphone mode, the amplifier delivers
14mW per channel into a 16load at 1% THD+N.
With the LM4919 packaged in the MM package, the cus-
tomer benefits include low profile and small size. This pack-
age minimizes PCB area and maximizes output power.
The LM4919 features circuitry that reduces output transients
("clicks" and "pops") during device turn-on and turn-off, an
externally controlled, low-power consumption, active-low
shutdown mode, and thermal shutdown. Boomer audio
power amplifiers are designed specifically to use few exter-
nal components and provide high quality output power in a
surface mount package.
Key Specifications
n Mono-BTL output power
n (RL = 8, VDD = 1.5V, THD+N = 1%)
85mW (typ)
n Stereo Headphone output power
n (RL = 16, VDD = 1.5V, THD+N = 1%) 14mW (typ)
n Micropower shutdown current
0.02µA (typ)
n Supply voltage operating range
0.9V < VDD < 2.5V
n PSRR 1kHz, VDD = 1.5V, RL = 16
72dB (typ)
Features
n Single-cell 0.9V to 2.5V battery operation
n BTL mode for mono speaker
n Single ended headphone operation with coupling
capacitors
n Unity-gain stable
n "Click and pop" suppression circuitry
n Active low micropower shutdown
n Low current, active-low mute mode
n Thermal shutdown protection circuitry
Applications
n Portable one-cell audio products
n Portable one-cell electronic devices
Typical Application
FIGURE 1. Block Diagram
20082101
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200821
www.national.com


National Semiconductor Electronic Components Datasheet

LM4919 Datasheet

1.5V/ Mono 85mW BTL Output/ 14mW Stereo Headphone Audio Amplifier

No Preview Available !

Connection Diagrams
MSOP Package
20082102
Top View
Order Number LM4919MM
See NS Package Number MUB10A for MSOP
MSOP Marking
200821F9
Z - Plant Code
X - Date Code
T - Die Traceability
G - Boomer Family
B6 - LM4919MM
www.national.com
2


Part Number LM4919
Description 1.5V/ Mono 85mW BTL Output/ 14mW Stereo Headphone Audio Amplifier
Maker National Semiconductor
Total Page 15 Pages
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