|
Details, datasheet, quote on part number:LM4877IBPX
| |
| Part: | LM4877IBPX |
| Category: | Multimedia => Audio => Amplifiers => Power Amplifiers => Boomer Audio Power Amplifiers |
| Description: | LM4877 - 1 Watt Audio Power Amplifier in Micro SMD Package With Shutdown Logic Low, Package: Microsmd, Pin Nb=8 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4877IBPX datasheet File size : 438 kB |
| Request For quote: | Find where to buy LM4877IBPX
|
| |
Datasheet text preview:
LM4877 1 Watt Audio Power Amplifier micro SMD package with Shutdown Logic Low
August 2000
LM4877 1 Watt Audio Power Amplifier in micro SMD package with Shutdown Logic Low
General Description
The LM4877 is a bridge-connected audio power amplifier capable of delivering 1 W of continuous average power to an 8 load with less than .2% (THD) from a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4877 does not require output coupling capacitors or bootstrap capacitors. It is optimally suited for low-power portable applications. The LM4877 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain stable LM4877 can be configured by external gain-setting resistors.
Key Specifications
n Power Output at 0.2% THD n Shutdown Current 1W (typ) 0.01µA (typ)
Features
n n n n n micro SMD package (see App. note AN-1112) 5V - 2V operation No output coupling capacitors or bootstrap capacitors. Unity-gain stable External gain configuration capability
Applications
n Cellular Phones n Portable Computers n Low Voltage Audio Systems
Typical Application
Connection Diagram
8 Bump micro SMD
DS101290-23
Top View Order Number LM4877IBP, LM4877IBPX See NS Package Number BPA08B6B
DS101290-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation
DS101290
www.national.com
LM4877
Absolute Maximum Ratings (Note 2)
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 (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature 6.0V -65°C to +150°C -0.3V to VDD +0.3V Internally Limited 2500V 250V 150°C
Soldering Information See AN-1112 Micro-SMD Wafers Level Chip Scale Package.
Operating Ratings
Temperature Range TMIN TA TMAX Supply Voltage -40°C TA 85°C 2.0V VDD 5.5V
Electrical Characteristics VDD = 5V
(Notes 1, 2, 9) The following specifications apply for VDD = 5V and 8 Load unless otherwise specified. Limits apply for TA = 25°C. LM4877 Units (Limits) V (min) V (max) mA (max) µA (max) mV (max) W % dB
Symbol VDD IDD ISD VOS Po THD+N PSRR
Parameter Supply Voltage Quiescent Power Supply Current Shutdown Current Output Offset Voltage Output Power Total Harmonic Distortion+Noise Power Supply Rejection Ratio
Conditions
Typical (Note 6)
Limit (Note 7) 2.0 5.5
VIN = 0V, Io = 0A VPIN5 = 0V VIN = 0V THD = 0.2% (max); f = 1 kHz Po = 0.25 Wrms; AVD = 2; 20 Hz f 20 kHz VDD = 4.9V to 5.1V
5.3 0.01 5 1 0.1 65
7 2 50
Electrical Characteristics VDD = 3.3V
(Notes 1, 2, 9) The following specifications apply for VDD = 3.3V and 8 Load unless otherwise specified. Limits apply for TA = 25°C. LM4877 Units (Limits) V (min) V (max) mA (max) µA (max) mV (max) .45 W % dB
Symbol VDD IDD ISD VOS Po THD+N PSRR
Parameter Supply Voltage Quiescent Power Supply Current Shutdown Current Output Offset Voltage Output Power Total Harmonic Distortion+Noise Power Supply Rejection Ratio
Conditions
Typical (Note 6)
Limit (Note 7) 2.0 5.5
VIN = 0V, Io = 0A VPIN5 = 0V VIN = 0V THD = 1% (max); f = 1 kHz Po = 0.25 Wrms; AVD = 2; 20 Hz f 20 kHz VDD = 3.2V to 3.4V
4 0.01 5 .5 0.15 65
Electrical Characteristics VDD = 2.6V
Symbol VDD IDD Parameter Supply Voltage Quiescent Power Supply Current
(Notes 1, 2, 8, 9) The following specifications apply for VDD = 2.6V and 8 Load unless otherwise specified. Limits apply for TA = 25°C. LM4877 Conditions Typical (Note 6) Limit (Note 7) 2.0 5.5 VIN = 0V, Io = 0A 3.4 Units (Limits) V (min) V (max) mA (max)
www.national.com
2
LM4877
Electrical Characteristics VDD = 2.6V
(Notes 1, 2, 8, 9) The following specifications apply for VDD = 2.6V and 8 Load unless otherwise specified. Limits apply for TA = 25°C. (Continued) LM4877
Symbol ISD VOS P0 THD+N PSRR
Parameter Shutdown Current Output Offset Voltage Output Power ( 8 ) Output Power ( 4 ) Total Harmonic Distortion+Noise Power Supply Rejection Ratio VPIN5 = 0V VIN = 0V
Conditions
Typical (Note 6) 0.01 5 0.25 0.5 0.25 65
Limit (Note 7)
Units (Limits) µA (max) mV (max) W W % dB
THD = 0.3% (max); f = 1 kHz THD = 0.5% (max); f = 1 kHz Po = 0.25 Wrms; AVD = 2; 20 Hz f 20 kHz VDD = 2.5V to 2.7V
Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: 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 3: 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 or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4877, TJMAX = 150°C. The typical junction-to-ambient thermal resistance is 150°C/W. Note 4: Human body model, 100 pF discharged through a 1.5 k resistor. Note 5: Machine Model, 220 pF 240 pF discharged through all pins. Note 6: Typicals are measured at 25°C and represent the parametric norm. Note 7: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level). Note 8: Low Voltage Circuit - See Fig. 4 Note 9: Shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a maximum of 2µA.
Electrical Characteristics VDD = 5/3.3/2.6V Shutdown Input
Symbol VIH VIL Parameter Shutdown Input Voltage High Shutdown Input Voltage Low Conditions LM4877 Typical Limit 1.2 0.4 Units (Limits) V(min) V(max)
External Components Description
Components 1. 2. Ri Ci
(Figure 1) Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a high pass filter with Ci at fC= 1/(2 RiCi). Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a highpass filter with Ri at fc = 1/(2 RiCi). Refer to the section, Proper Selection of External Components, for an explanation of how to determine the value of Ci. Feedback resistance which sets the closed-loop gain in conjunction with Ri. Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for information concerning proper placement and selection of the supply bypass capacitor. Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External Components, for information concerning proper placement and selection of CB.
3. 4. 5.
Rf CS CB
3
www.national.com
|
|
