Datasheet

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LM48580

www.ti.com

SNAS491A –FEBRUARY 2010–REVISED MAY 2013

LM48580 Boomer™ Audio Power Amplifier Series High Efficiency Class H, High Voltage,

Haptic Piezo Actuator / Ceramic Speaker Driver

Check for Samples: LM48580

FEATURES

KEY SPECIFICATIONS

• Class H Driver

• Output Voltage at V

= 3.6V, R

= 6μF+10Ω,

THD+N ≤ 1%

• Integrated Boost Converter

– 30V

P-P

(Typ)

• Bridge-tied Load Output

• Quiescent Power Supply Current at 3.6V

• Differential Input

– 2.7mA (Typ)

• Three Pin-Programmable Gains

• Power Dissipation at 25V

P-P

• Low Supply Current

– 800mW (Typ)

• Minimum External components

• Shutdown Current

• Micro-Power Shutdown

– 0.1μA (Typ)

• Thermal Overload Protection

• Available in Space-Saving 12-bump DSBGA

DESCRIPTION

package

The LM48580 is a fully differential, high voltage driver

for piezo actuators and ceramic speakers for portable

APPLICATIONS

multi-media devices. Part of TI’s Powerwise product

• Touch Screen Smart Phones

line, the LM48580’s Class H architecture offers

significant power savings compared to traditional

• Tablet PCs

Class AB amplifiers. The device provides 30V

P-P

• Portable Electronic Devices

output drive while consuming just 15mW of quiescent

• MP3 Players

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

DSBGA package (1.46mm x 1.97mm).

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2Boomer is a trademark of Texas Instruments.

3All other trademarks are the property of their respective owners.

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.

Summary of content (19 pages)

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LM48580 www.ti.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com Typical Application +2.5V to +5.5V L1 D1 4.7 PH CS VDD SW VBST CBST 1 PF BOOST CONVERTER PGND VAMP SHDN CIN 0.47 PF 10: IN+ OUTGAIN STAGE CIN 0.47 PF OUTPUT STAGE OUT+ IN6 PF GAIN SGND Figure 1. Typical Application Circuit Connection Diagram 1 2 3 A OUT+ SGND IN+ B OUT- GAIN IN- C VAMP SHDN VDD D VBST SW PGND Figure 2. DSBGA Package 1.46mm x 1.97mm x 0.
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LM48580 www.ti.com SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 Figure 3. YZR0012 Package View (Bumps Up) PIN DESCRIPTIONS Bump Name Description A1 OUT+ Amplifier Non-Inverting Output A2 SGND Amplifier Ground A3 IN+ B1 OUT- Amplifier Inverting Output B2 GAIN Gain Select: GAIN = float: AV = 18dB GAIN = GND: AV = 24dB GAIN = VDD: AV = 30dB Amplifier Inverting Input Amplifier Non-Inverting Input B3 IN- C1 VAMP Amplifier Supply Voltage. Connect to VBST C2 SHDN Active Low Shutdown.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com Absolute Maximum Ratings (1) (2) (3) Supply Voltage (1) 6V SW Voltage 25V VBST Voltage 21V VAMP 17V −0.3V to VDD + 0.
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LM48580 www.ti.com SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 Electrical Characteristics VDD = 3.6V (1) (2) The following specifications apply for RL = 6μF + 10Ω, CBST = 1μF, CIN = 0.47μF, AV = 24dB unless otherwise specified. Limits apply for TA = 25°C. LM48580 Symbol Parameter Conditions Min (3) VDD Supply Voltage Range Typ (4) 2.5 Max (3) Units (Limits) 5.5 V 4 mA VIN = 0V, RL = ∞ IDD Quiescent Power Supply Current VDD = 3.6V 2.7 VDD = 3V 3 mA VDD = 3.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com VDD ANALYZER - + VDD IN+ IN- ZL DUT 200 mVp-p Figure 4. PSRR Test Circuit 200 mVp-p ANALYZER + VDD - VDD IN+ IN- DUT ZL Figure 5.
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LM48580 www.ti.com SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 Typical Performance Characteristics THD+N vs Frequency VDD = 4.2V, VOUT = 10VP-P RL = 6μF + 10Ω 100 100 10 10 THD+N (%) THD+N (%) THD+N vs Frequency VDD = 3.6V, VOUT = 9VP-P RL = 6μF + 10Ω 1 0.1 1 0.1 0.01 0.001 10 0.01 100 1000 10000 100000 0.001 10 100 FREQUENCY (Hz) Output Voltage vs Frequency VDD = 3.6V, THD+N = 5% RL = 6μF + 10Ω Output Voltage vs Frequency VDD = 4.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) Power Consumption vs Output Voltage VDD = 3.6V, RL = 6μF + 10Ω Power Consumption vs Output Voltage VDD = 4.2V, RL = 6μF + 10Ω 2500 3000 POWER DISSIPATION (mW) POWER DISSIPATION (mW) f = 2 kHz 2000 1500 1000 f = 200 Hz 500 0 0 5 10 15 20 25 30 2500 f = 2 kHz 2000 1500 1000 f = 200 Hz 500 0 0 35 5 OUTPUT VOLTAGE (VP-P) 35 15 20 25 30 35 Figure 12. Figure 13.
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LM48580 www.ti.com SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 APPLICATION INFORMATION GENERAL AMPLIFIER FUNCTION The LM48580 is a fully differential, Class H ceramic element driver for ceramic speakers and haptic actuators. The integrated, high efficiency boost converter dynamically adjusts the amplifier’s supply voltage based on the output signal, increasing headroom and improving efficiency compared to a conventional Class AB driver.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com GAIN SETTING The LM48580 features three internally configured gain settings 18, 24, and 30dB. The device gain is selected through a single pin (GAIN). The gain settings are shown in Table 1. Table 1. Gain Setting Gain Gain Setting FLOAT 18dB GND 24dB VDD 30dB SHUTDOWN FUNCTION The LM48580 features a low current shutdown mode. Set SD = GND to disable the amplifier and boost converter and reduce supply current to 0.01µA.
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LM48580 www.ti.com SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 Table 2. Recommended Inductors MANUFACTURER PART# INDUCTANCE/ISAT Taiyo Yuden BRL3225T4R7M 4.7µH/1.1A Coilcraft LP3015 4.7µH/1.1A Diode Selection Use a Schottkey diode as shown in Figure 1. A 20V diode such as the NSR0520V2T1G from On Semiconductor is recommended. The NSR0520V2T1G is designed to handle a maximum average current of 500mA.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com Table 3. Demoboard Bill of Materials (continued) DESIGNATOR QUANTITY DESCRIPTION 20V, 500mA D1 1 Schottky Diode (SOD-523) ON Semiconductor NSR0520V2T1G 4.7µH ±20% 1.
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LM48580 www.ti.com SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 PC Board Layout Figure 19. Top Silk Screen Figure 20. Top Layer Figure 21. Layer 2 Figure 22. Layer 3 Figure 23. Bottom Silkscreen Figure 24.
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LM48580 SNAS491A – FEBRUARY 2010 – REVISED MAY 2013 www.ti.com Revision History 14 Rev Date 1.0 02/23/10 A 05/02/2013 Description Initial released. Changed layout of National Data Sheet to TI format.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) LM48580TL/NOPB DSBGA YZR 12 250 178.0 8.4 LM48580TLX/NOPB DSBGA YZR 12 3000 178.0 8.4 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1.68 2.13 0.76 4.0 8.0 Q1 1.68 2.13 0.76 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM48580TL/NOPB DSBGA YZR LM48580TLX/NOPB DSBGA YZR 12 250 210.0 185.0 35.0 12 3000 210.0 185.0 35.
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MECHANICAL DATA YZR0012xxx 0.600±0.075 D E TLA12XXX (Rev C) D: Max = 1.99 mm, Min = 1.93 mm E: Max = 1.49 mm, Min = 1.43 mm 4215049/A NOTES: A. All linear dimensions are in millimeters. Dimensioning and tolerancing per ASME Y14.5M-1994. B. This drawing is subject to change without notice. www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.