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Details, datasheet, quote on part number:LM4849MH
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| Part: | LM4849MH |
| Category: | Multimedia => Audio => Amplifiers => Power Amplifiers => Boomer Audio Power Amplifiers |
| Description: | LM4849 - Stereo 2W Audio Power Amplifiers With DC Volume Control And Input Mux, Package: Tssop Exp Pad, Pin Nb=28 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4849MH datasheet File size : 707 kB |
| Request For quote: | Find where to buy LM4849MH
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Datasheet text preview:
LM4849 Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux
August 2003
LM4849 Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux
General Description
The LM4849 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 (Note 1) with less than 1.0% THD+N, or 2.2W into 3 (Note 2) with less than 1.0% THD+N. Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4849 incorporates a DC volume control, stereo bridged audio power amplifiers, and an input mux making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4849 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.
Note 1: When properly mounted to the circuit board, the LM4849MH will deliver 2W into 4. See the Application Information section for LM4849MH usage information. Note 2: An LM4849MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3.
Key Specifications
j PO at 1% THD+N
into 3 (Note2) into 4 (Note1) into 8
j Single-ended mode - THD+N at 85mW
2.2W (typ) 2.0W (typ) 1.1W (typ) 1.0% (typ) 0.2µA (typ)
into 32
j Shutdown Current
Features
n n n n n DC Volume Control Interface Input mux Stereo switchable bridged/single-ended power amplifiers "Click and pop" suppression circuitry Thermal shutdown protection circuitry
Applications
n Portable and Desktop Computers n Multimedia, LCD Monitors/TV n Portable Radios, PDAs, and Portable TVs
Connection Diagram
TSSOP Package
20076702
Top View Order Number LM4849MH See NS Package Number MXA28A for Exposed-DAP TSSOP
Boomer ® is a registered trademark of NationalSemiconductor Corporation.
© 2003 National Semiconductor Corporation
DS200767
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LM4849
Absolute Maximum Ratings
(Note 10)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation ESD Susceptibility (Note 12) ESD Susceptibility (Note 13) Junction Temperature Soldering Information Vapor Phase (60 sec.) Infrared (15 sec.) 6.0V -65°C to +150°C -0.3V to VDD +0.3V Internally limited 2500V 250V 150°C 215°C 220°C
See AN-450 "Surface Mounting and their Effects on Product Reliability" for other methods of soldering surface mount devices. JA (typ) -- MXA28A (exposed DAP) (Note 3) JA (typ) -- MXA28A (exposed DAP) (Note 4) JA (typ) -- MXA28A (exposed DAP) (Note 5) JA (typ) -- MXA28A (exposed DAP) (Note 6) 41°C/W 54°C/W 59°C/W 93°C/W
Operating Ratings
Temperature Range TMIN TA TMAX Supply Voltage -40°C TA 85°C 2.7V VDD 5.5V
Electrical Characteristics for Entire IC
(Notes 7, 10) The following specifications apply for VDD = 5V and TA = 25°C unless otherwise noted. LM4849 Symbol VDD IDD ISD VIH VIL Parameter Supply Voltage Quiescent Power Supply Current Shutdown Current VIN High on all Logic Inputs VIN Low on all Logic Inputs VIN = 0V, IO = 0A Vshutdown = VDD 15 0.7 Conditions Typical (Note 14) Limit (Note 15) 2.7 5.5 30 2.0 0.8 x VDD 0.2 x VDD Units (Limits) V (min) V (max) mA (max) µA (max) V (min) V (max)
Electrical Characteristics for Volume Attenuators
(Notes 7, 10) The following specifications apply for VDD = 5V and TA = 25°C unless otherwise noted. LM4849 Symbol CRANGE CRANGE AM Parameter Attenuator Range Attenuator Range Mute Attenuation Conditions Gain with VDCVol = 5.0V, No Load Attenuation with VDCVol = 0V (BM & SE) Vmute = 5V, Bridged Mode (BM) Vmute = 5V, Single-Ended Mode (SE) Typical (Note 14) Limit (Note 15) Units (Limits) dB (max) dB (min) dB (min) dB (min)
± 0.75
-75 -78 -78
Electrical Characteristics for Single-Ended Mode Operation
(Notes 7, 10) The following specifications apply for VDD = 5V and TA = 25°C unless otherwise noted. LM4849 Symbol PO THD+N PSRR SNR Xtalk Parameter Output Power Total Harmonic Distortion+Noise Power Supply Rejection Ratio Signal to Noise Ratio Channel Separation Conditions THD+N = 1.0%; f = 1kHz; RL = 32 THD+N = 10%; f = 1 kHz; RL = 32 VOUT = 1VRMS, f=1kHz, RL = 10k, AVD = 1 CB = 1.0 µF, f =120 Hz, VRIPPLE = 200 mVrms POUT =75 mW, R Filter
L
Typical (Note 14) 85 95 0.065 58 102 65
Limit (Note 15)
Units (Limits) mW mW % dB dB dB
= 32, A-Wtd
f=1kHz, CB = 1.0 µF
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LM4849
Electrical Characteristics for Bridged Mode Operation
(Notes 7, 10) The following specifications apply for VDD = 5V and TA = 25°C unless otherwise noted. LM4849 Symbol VOS PO Parameter Output Offset Voltage Output Power Conditions VIN = 0V, No Load THD + N = 1.0%; f=1kHz; RL = 3 (Note 8) THD + N = 1.0%; f=1kHz; RL = 4 (Note 9) THD = 1.5% (max);f = 1 kHz; RL = 8 THD+N = 10%;f = 1 kHz; RL = 8 THD+N Total Harmonic Distortion+Noise PO = 1W, f = 1kHz, RL = 8, AVD = 2 PO = 340 mW, RL = 32 PSRR SNR Xtalk Power Supply Rejection Ratio Signal to Noise Ratio Channel Separation CB = 1.0 µF, f = 120 Hz, VRIPPLE = 200 mVrms; RL = 8 VDD = 5V, POUT = 1.1W, RL = 8, A-Wtd Filter f=1kHz, CB = 1.0 µF 2.2 2 1.1 1.5 0.2 1.0 74 93 70 1.0 Typical (Note 14) Limit (Note 15) Units (Limits) mV (max) W W W (min) W % % dB dB dB
± 50
Note 3: The JA given is for an MXA28A package whose exposed-DAP is soldered to an exposed 2in 2 piece of 1 ounce printed circuit board copper. Note 4: The JA given is for an MXA28A package whose exposed-DAP is soldered to a 2in2 piece of 1 ounce printed circuit board copper on a bottom side layer through 21 8mil vias. Note 5: The JA given is for an MXA28A package whose exposed-DAP is soldered to an exposed 1in2 piece of 1 ounce printed circuit board copper. Note 6: The JA given is for an MXA28A package whose exposed-DAP is not soldered to any copper. Note 7: All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical application as shown in Figure 2. Note 8: When driving 3 loads from a 5V supply the LM4849MH exposed DAP must be soldered to the circuit board and forced-air cooled. Note 9: When driving 4 loads from a 5V supply the LM4849MH exposed DAP must be soldered to the circuit board. Note 10: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance. Note 11: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, JA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA )/JA. Note 12: Human body model, 100pF discharged through a 1.5k resistor. Note 13: Machine Model, 220pF 240pF discharged through all pins. Note 14: Typicals are measured at 25°C and represent the parametric norm. Note 15: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
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