LM48580TLX+

Manufacturer Part NumberLM48580TLX+
ManufacturerNational Semiconductor
LM48580TLX+ datasheets
 


Specifications of LM48580TLX+

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High Efficiency Class H, High Voltage, Haptic Piezo
Actuator / Ceramic Speaker Driver
General Description
The LM48580 is a fully differential, high voltage driver for
piezo actuators and ceramic speakers for portable multi-me-
dia devices. Part of National’s Powerwise product line, the
LM48580’s Class H architecture offers significant power sav-
ings compared to traditional Class AB amplifiers. The device
provides 30V
output drive while consuming just 15mW of
P-P
quiescent power.
The LM48580 is a single supply driver with an integrated
boost converter which allows the device to deliver 30V
a single 3.6V supply.
The LM48580 has three pin-programmable gain settings and
a low power Shutdown mode that reduces quiescent current
consumption to 0.1µA. The LM48580 is available in an ultra-
small 12-bump micro SMD package (1.46mm x 1.97mm).
Key Specifications
■ 
Output Voltage at V
= 3.6V
DD
= 6μF+10Ω, THD+N
R
1%
L
■ 
Quiescent Power Supply current
at 3.6V
■ 
Power Dissipation at 25V
P-P
■ 
Shutdown current
Typical Application
Boomer
®
is a registered trademark of National Semiconductor Corporation.
© 2010 National Semiconductor Corporation
LM48580
Features
Class H Driver
Integrated Boost Converter
Bridge-tied Load Output
Differential Input
Three Pin-Programmable Gains
Low Supply Current
Minimum external components
from
Micro-power shutdown
P-P
Thermal overload protection
Available in space-saving 12-bump microSMD package
Applications
Touch screen Smart Phones
Tablet PCs
Portable Electronic Devices
MP3 Players
30V
(typ)
P-P
2.7mA (typ)
800mW (typ)
0.1μA (typ)
FIGURE 1. Typical Application Circuit
301080
February 23, 2010
30108070
www.national.com