LM48580TL

更新时间： 2024-11-11 11:36:31

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
16页	402K
描述
High Efficiency Class H, High Voltage, Haptic Piezo Actuator / Ceramic Speaker Driver

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LM48580TL 数据手册

February 23, 2010

LM48580

High Efficiency Class H, High Voltage, Haptic Piezo

Actuator / Ceramic Speaker Driver

General Description

Features

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_P-Poutput drive while consuming just 15mW of

quiescent power.

Class H Driver

■

Integrated Boost Converter

Bridge-tied Load Output

Differential Input

Three Pin-Programmable Gains

Low Supply Current

The LM48580 is a single supply driver with an integrated

boost converter which allows the device to deliver 30V_P-Pfrom

a single 3.6V supply.

Minimum external components

Micro-power shutdown

Thermal overload protection

■

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).

Available in space-saving 12-bump microSMD package

Applications

Touch screen Smart Phones

■

Key Specifications

Tablet PCs

Portable Electronic Devices

■ꢀOutput Voltage at V_DD= 3.6V

MP3 Players

R_L= 6μF+10Ω, THD+N ≤ 1%

30V_P-P(typ)

■ꢀQuiescent Power Supply current

at 3.6V

2.7mA (typ)

800mW (typ)

■ꢀPower Dissipation at 25V_P-P

■ꢀShutdown current

0.1μA (typ)

Typical Application

30108070

FIGURE 1. Typical Application Circuit

Boomer^®is a registered trademark of National Semiconductor Corporation.

301080

www.national.com

12 3 4 5 6 7...16

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