Datasheet

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LM4889

www.ti.com

SNAS157H –APRIL 2002–REVISED MAY 2013

LM4889 1 Watt Audio Power Amplifier

Check for Samples: LM4889

FEATURES

DESCRIPTION

The LM4889 is an audio power amplifier primarily

• Available in Space-Saving VSSOP, SOIC,

designed for demanding applications in mobile

WSON, and DSBGA Packages

phones and other portable communication device

• Ultra Low Current Shutdown Mode (3.3 to 2.6V

applications. It is capable of delivering 1 watt of

- 0.01µA)

continuous average power to an 8Ω BTL load with

less than 2% distortion (THD+N) from a 5V

power

• Can Drive Capacitive Loads up to 500 pF

supply.

• Improved Pop & Click Circuitry Eliminates

Noises During Turn-On and Turn-Off

Boomer™ audio power amplifiers were designed

Transitions specifically to provide high quality output power with a

minimal amount of external components. The

• 2.2 - 5.5V Operation

LM4889 does not require output coupling capacitors

• No Output Coupling Capacitors, Snubber

or bootstrap capacitors, and therefore is ideally suited

Networks or Bootstrap Capacitors Required

for mobile phone and other low voltage applications

where minimal power consumption is a primary

• Unity-Gain Stable

requirement.

• External Gain Configuration Capability

The LM4889 features a low-power consumption

APPLICATIONS

shutdown mode, which is achieved by driving the

shutdown pin with a logic low. Additionally, the

• Mobile Phones

LM4889 features an internal thermal shutdown

• PDAs

protection mechanism.

• Portable Electronic Devices

The LM4889 contains advanced pop & click circuitry

to eliminate noise which would otherwise occur during

KEY SPECIFICATIONS

turn-on and turn-off transitions.

• Improved PSRR at 217Hz, 5 - 3.3V 75dB

The LM4889 is unity-gain stable and can be

• Power Output at 5.0V & 2% THD 1.0W(typ.)

configured by external gain-setting resistors.

• Power Output at 3.3V & 1% THD 400mW(typ.)

• Shutdown Current at 3.3 & 2.6V 0.01µA(typ.)

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 (26 pages)

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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 LM4889 1 Watt Audio Power Amplifier Check for Samples: LM4889 FEATURES DESCRIPTION • The LM4889 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 2% distortion (THD+N) from a 5VDC power supply.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Typical Application Figure 1. Typical Audio Amplifier Application Circuit Connection Diagram Figure 2. Small Outline (SOIC) Package - Top View See Package Number D Figure 3. Mini Small Outline (VSSOP) Package – Top View See Package Number DGK Figure 4. 8-Bump DSBGA - Top View See Package Number YZR0008 Figure 5. WSON Package - Top View See Package Number NGZ These devices have limited built-in ESD protection.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Absolute Maximum Ratings (1) (2) Supply Voltage 6.0V −65°C to +150°C Storage Temperature −0.3V to VDD +0.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Electrical Characteristics VDD = 5V(1)(2) (continued) The following specifications apply for VDD = 5V, AV = 2, and 8Ω load unless otherwise specified. Limits apply for TA = 25°C.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Electrical Characteristics VDD = 2.6V(1)(2) (continued) The following specifications apply for VDD = 2.6V, AV = 2, and 8Ω load unless otherwise specified. Limits apply for TA = 25°C.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics 6 THD+N vs Frequency at VDD = 5V, 8Ω RL, and PWR = 250mW THD+N vs Frequency at VDD = 3.3V, 8Ω RL, and PWR = 150mW Figure 6. Figure 7. THD+N vs Frequency at VDD = 2.6V, 8Ω RL, and PWR = 100mW THD+N vs Frequency at VDD = 2.6V, 4Ω RL, and PWR = 100mW Figure 8. Figure 9. THD+N vs Power Out at VDD = 5V, 8Ω RL, 1kHz THD+N vs Power Out at VDD = 3.3V, 8Ω RL, 1kHz Figure 10. Figure 11.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Typical Performance Characteristics (continued) THD+N vs Power Out at VDD = 2.6V, 8Ω RL, 1kHz THD+N vs Power Out at VDD = 2.6V, 4Ω RL, 1kHz Figure 12. Figure 13. Power Supply Rejection Ratio (PSRR) at VDD = 5V Power Supply Rejection Ratio (PSRR) at VDD = 5V Figure 14. Input terminated with 10Ω R Figure 15. Input Floating Power Supply Rejection Ratio (PSRR) at VDD = 2.6V Power Supply Rejection Ratio (PSRR) at VDD = 3.3V Figure 16.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) 8 Power Dissipation vs Output Power VDD = 3.3V Power Dissipation vs Output Power VDD = 5V Figure 18. Figure 19. Output Power vs Load Resistance Power Dissipation vs Output Power VDD = 2.6V Figure 20. Figure 21. Supply Current vs Shutdown Voltage Clipping (Dropout) Voltage vs Supply Voltage Figure 22. Figure 23.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Typical Performance Characteristics (continued) Open Loop Frequency Response Frequency Response vs Input Capacitor Size Figure 24. Figure 25. Noise Floor Power Derating Curves (PDMAX = 670mW) Figure 26. Figure 27. Power Derating Curves - 8 bump µSMD (PDMAX = 670mW) Power Derating Curves - 10 Pin LD pkg (PDMAX = 670mW) Figure 28. Figure 29.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Application Information BRIDGE CONFIGURATION EXPLANATION As shown in Figure 1, the LM4889 has two operational amplifiers internally, allowing for a few different amplifier configurations. The first amplifier's gain is externally configurable, while the second amplifier is internally fixed in a unity-gain, inverting configuration.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 SHUTDOWN FUNCTION In order to reduce power consumption while not in use, the LM4889 contains a shutdown pin to externally turn off the amplifier's bias circuitry. This shutdown feature turns the amplifier off when a logic low is placed on the shutdown pin. By switching the shutdown pin to ground, the LM4889 supply current draw will be minimized in idle mode. While the device will be disabled with shutdown pin voltages less than 0.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com AUDIO POWER AMPLIFIER DESIGN A 1W/8Ω Audio Amplifier • Given: – Power Output: 1 Wrms – Load Impedance: 8Ω – Input Level: 1 Vrms – Input Impedance: 20 kΩ – Bandwidth: 100 Hz–20 kHz ± 0.25 dB A designer must first determine the minimum supply rail to obtain the specified output power. By extrapolating from the Output Power vs Supply Voltage graphs in the Typical Performance Characteristics section, the supply rail can be easily found.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Figure 30. Higher Gain Audio Amplifier The LM4889 is unity-gain stable and requires no external components besides gain-setting resistors, an input coupling capacitor, and proper supply bypassing in the typical application. However, if a closed-loop differential gain of greater than 10 is required, a feedback capacitor (C4) may be needed as shown in Figure 30 to bandwidth limit the amplifier.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Figure 31. Differential Amplifier Configuration for LM4889 Figure 32.
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LM4889 www.ti.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com REFERENCE DESIGN BOARD AND PCB LAYOUT GUIDELINES - VSSOP & SOIC BOARDS Figure 33. Reference Design Board LM4889 SOIC DEMO BOARD ARTWORK Figure 34.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Figure 35. Top Layer Figure 36. Bottom Layer LM4889 VSSOP DEMO BOARD ARTWORK Figure 37.
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LM4889 SNAS157H – APRIL 2002 – REVISED MAY 2013 www.ti.com Figure 38. Top Layer Figure 39.
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LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 REVISION HISTORY Changes from Revision G (May 2013) to Revision H • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 12-Aug-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) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM4889MAX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM4889MM/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM4889MMX/NOPB VSSOP DGK 8 3500 330.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 12-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM4889MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM4889MM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LM4889MMX/NOPB VSSOP DGK 8 3500 367.0 367.0 35.
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