LM48580_14 Datasheet, PDF (1/21 Pages) Texas Instruments – High Efficiency Class H, High Voltage, Haptic Piezo Actuator

LM48580
www.ti.com
SNAS491 – FEBRUARY 2010
LM48580
High Efficiency Class H, High Voltage, Haptic
Piezo Actuator / Ceramic Speaker Driver
Check for Samples: LM48580
FEATURES
1
•2 Class H Driver
• Integrated Boost Converter
• Bridge-tied Load Output
• Differential Input
• Three Pin-Programmable Gains
• Low Supply Current
• Minimum external components
• Micro-power shutdown
• Thermal overload protection
• Available in space-saving 12-bump microSMD
package
APPLICATIONS
• Touch screen Smart Phones
• Tablet PCs
• Portable Electronic Devices
• MP3 Players
DESCRIPTION
The LM48580 is a fully differential, high voltage driver for piezo actuators and ceramic speakers for portable
multi-media devices. Part of National’s Powerwise product line, the LM48580’s Class H architecture offers
significant power savings compared to traditional Class AB amplifiers. The device provides 30V_P-P output drive
while consuming just 15mW of quiescent power.
The LM48580 is a single supply driver with an integrated boost converter which allows the device to deliver 30V_P-
P ^{from 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).
■ Output Voltage at V_DD = 3.6V
R_L = 6μF+10Ω, THD+N ≤ 1%
■ Quiescent Power Supply current
at 3.6V
■ Power Dissipation at 25V_P-P
■ Shutdown current
Table 1. Key Specifications
VALUE
30
2.7
800
0.1
UNIT
V_P-P (typ)
mA (typ)
mW (typ)
μA (typ)
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated