Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Audio amplifier 1-channel (mono) with stereo headphones Class AB VSSOP 10

LM4853

www.ti.com

SNAS155E –JANUARY 2002–REVISED MAY 2013

LM4853 Mono 1.5 W / Stereo 300mW Power Amplifier

Check for Samples: LM4853

FEATURES

DESCRIPTION

The LM4853 is an audio power amplifier capable of

• Mono 1.5W BTL or Stereo 300mW Output

delivering 1.5W (typ) of continuous average power

• Headphone Sense

into a mono 4Ω bridged-tied load (BTL) with 1%

• “Click and Pop” Suppression Circuitry

THD+N or 95mW per channel of continuous average

power into stereo 32Ω single-ended (SE) loads with

• No Bootstrap Capacitors Required

1% THD+N, using a 5V power supply.

• Thermal Shutdown Protection

The LM4853 can automatically switch between mono

• Unity-Gain Stable

BTL and stereo SE modes utilizing a headphone

• Available in Space-Saving VSSOP and WSON

sense pin. It is ideal for any system that provides

Packaging

both a monaural speaker output and a stereo line or

headphone output

APPLICATIONS

Boomer audio power amplifiers were designed

• Portable Computers

specifically to provide high quality output power with a

minimal amount of external components. Since the

• Desktop Computers

LM4853 does not require bootstrap capacitors or

• PDA's

snubber networks, it is optimally suited for low-power

• Handheld Games

portable systems.

The LM4853 features an externally controlled,

KEY SPECIFICATIONS

micropower consumption shutdown mode and

• Output Power at 1% THD+N, 1kHz:

thermal shutdown protection. The unity-gain stable

LM4853's gain is set by external gain-setting resistors

– LM4853LD 3Ω BTL 1.9W (typ)

– LM4853LD 4Ω BTL 1.7W (typ)

– LM4853MM 4Ω BTL 1.5W (typ)

– LM4853MM,LD 8Ω BTL 1.1W (typ)

– LM4853MM,LD 8Ω SE 300mW (typ)

– LM4853MM,LD 32Ω SE 95mW (typ)

• THD+N at 1kHz, 95mW into 32Ω SE 1% (typ)

• Single Supply Operation 2.4 to 5.5V

• Shutdown Current 18µA (typ)

Connection Diagram

Figure 1. 10 Lead VSSOP – Top View Figure 2. 14 Lead WSON – Top View

See Package Number DGS See Package Number NHE0014A

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.

2All 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 (25 pages)

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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 LM4853 Mono 1.5 W / Stereo 300mW Power Amplifier Check for Samples: LM4853 FEATURES DESCRIPTION • • • • • • • The LM4853 is an audio power amplifier capable of delivering 1.5W (typ) of continuous average power into a mono 4Ω bridged-tied load (BTL) with 1% THD+N or 95mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, using a 5V power supply. 1 2 Mono 1.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com Typical Application Figure 3.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Supply Voltage 6.0V −65°C to +150°C Storage Temperature ESD Susceptibility (3) ESD Machine model 3.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com Electrical Characteristics(1)(2) (continued) The following specifications apply for VDD= 5.0V, TA= 25°C unless otherwise specified. Symbol Parameter Conditions LM4853 Typical PO Output Power (3) Limit (4) (5) Units (Limits) BTL Mode; RL = 3Ω THD+N = 1%; LM4853LD 1.9 W BTL Mode; RL = 4Ω THD+N = 1%; LM4853LD 1.7 W BTL Mode; RL = 4Ω THD+N = 1%; LM4853MM 1.5 W BTL Mode; RL = 8Ω THD+N = 1%; LM4853MM, LD 1.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 Electrical Characteristics (1) (2) The following specifications apply for VDD= 2.7V, TA= 25°C unless otherwise specified. Symbol Parameter Conditions LM4853 Typical IDD Supply Current (3) Limit (4) (5) Units (Limits) BTL Mode; VIN = 0V; IO = 0A 1.8 mA SE Mode; VIN = 0V; IO = 0A 1.8 mA µA ISD Shutdown Current SD Mode; VSHUTDOWN = VDD 10 VOS Output Offset Voltage BTL Mode; AV = 2 BTL OUT+ to BTL OUT− 5.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics LD Specific Characteristics 6 LM4853LD THD+N vs Frequency LM4853LD THD+N vs Frequency Figure 4. Figure 5. LM4853LD THD+N vs Output Power LM4853LD THD+N vs Output Power Figure 6. Figure 7. LM4853LD Power Dissipation vs Output Power LM4853LD Power Derating Curve Figure 8. Figure 9.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency Figure 10. Figure 11. THD+N vs Frequency THD+N vs Frequency Figure 12. Figure 13. THD+N vs Frequency THD+N vs Frequency Figure 14. Figure 15.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) 8 THD+N vs Frequency THD+N vs Output Power Figure 16. Figure 17. THD+N vs Output Power THD+N vs Output Power Figure 18. Figure 19. THD+N vs Output Power THD+N vs Output Power Figure 20. Figure 21.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 Typical Performance Characteristics (continued) THD+N vs Output Power THD+N vs Output Power Figure 22. Figure 23. THD+N vs Output Power Output Power vs Load Resistance Figure 24. Figure 25. Output Power vs Load Resistance Output Power vs Supply Voltage Figure 26. Figure 27.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) 10 Output Power vs Supply Voltage Dropout Voltage vs Supply Voltage Figure 28. Figure 29. Power Dissipation vs Output Power Power Dissipation vs Output Power Figure 30. Figure 31. Power Derating Curve Channel Separation Figure 32. Figure 33.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 Typical Performance Characteristics (continued) Noise Floor Open Loop Frequency Response Figure 34. Figure 35. Supply Current vs Supply Voltage Power Supply Rejection Ratio Figure 36. Figure 37. Power Supply Rejection Ratio Figure 38.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com APPLICATION INFORMATION BRIDGED AND SINGLE-ENDED OPERATION As shown in Typical Application, the LM4853 contains three operational amplifiers (A1-A3). These amplifiers can be configured for SE or BTL modes. In the SE mode, the LM4853 operates as a high current output dual op amp. A1 and A3 are independent amplifiers with an externally configured gain of AV = - RF/RI.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 A bridge configuration, such as the one used in LM4853, also creates a second advantage over single-ended amplifiers. Since the differential outputs, BTL OUT- and BTL OUT+, are biased at half-supply, no net DC voltage exists across the load. This eliminates the need for the output coupling capacitor that a single supply, singleended amplifier configuration requires.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com In many applications, a microcontroller or microprocessor output is used to control the shutdown circuitry. This provides a quick, smooth shutdown transition. Another solution is to use a single-pole, single-throw switch in conjunction with an external pull-up resistor. When the switch is closed, the SHUTDOWN pin is connected to ground and enables the amplifier. If the switch is open, the external pull-up resistor, RPU2 will disable the LM4853.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 Selecting Input and Output Capacitor Values Besides gain, one of the major considerations is the closed-loop bandwidth of the amplifier. To a large extent, the bandwidth is dictated by the choice of external components shown in Figure 3. The input coupling capacitor CI and resistor RI form a first order high pass filter that limits low frequency response.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 www.ti.com The high frequency pole is determined by the product of the desired high frequency pole, fH, and the differential gain, AVD. With AVD = 3 and fH = 100kHz, the resulting GBWP = 150kHz which is much smaller than the LM4853 GBWP of 10MHz. This difference indicates that a designer can still use the LM4853 at higher differential gains without bandwidth limitations.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 Figure 41. Recommended MM PC Board Layout: Component-Side Layout Figure 42.
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LM4853 SNAS155E – JANUARY 2002 – REVISED MAY 2013 18 www.ti.
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LM4853 www.ti.com SNAS155E – JANUARY 2002 – REVISED MAY 2013 REVISION HISTORY Changes from Revision D (May 2013) to Revision E • Page 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) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM4853LD/NOPB WSON NHE 14 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 LM4853MM/NOPB VSSOP DGS 10 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM4853MMX/NOPB VSSOP DGS 10 3500 330.0 12.4 5.3 3.4 1.4 8.0 12.
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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) LM4853LD/NOPB WSON NHE 14 1000 213.0 191.0 55.0 LM4853MM/NOPB VSSOP DGS 10 1000 210.0 185.0 35.0 LM4853MMX/NOPB VSSOP DGS 10 3500 367.0 367.0 35.
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MECHANICAL DATA NHE0014A LDA14A (REV A) 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.