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LM4702 -
Stereo High Fidelity 200 Volt Driver with Mute
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Features
| • | Very high voltage operation |
| • | Scalable output power |
| • | Minimum external components |
| • | External compensation |
| • | Thermal Shutdown and Mute |
Key Specification
| Wide operating voltage range | |
| LM4702A* (in development) | ±20V to ±100V |
| LM4702B | ±20V to ±100V |
| LM4702C | ±20V to ±75V |
| Equivalent Noise | 3µV |
| PSRR | 110dB (typ) |
| THD+N (A and B Grades) | 0.0003% |
General Description
The LM4702 is a high fidelity audio power amplifier driver designed for demanding consumer and pro-audio applications. More...
Applications
| • | AV receivers |
| • | Audiophile power amps |
| • | Pro Audio |
| • | High voltage industrial applications |
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Typical Application
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| Parameters | Values |
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| THD |
0.005, 0.0003 % |
| PSRR |
110 dB |
| Single/Dual/Quad |
Dual |
| THD Conditions |
No load, Av=30dB, Vout=20Vrms, f=1kHz, No load, Av=30dB, Vout=14Vrms, f=1kHz |
| PSRR Conditions |
Rs=1k, f=100Hz, 1Vrms, input referred |
| User Supply |
100, 75 Volt |
| Shut down |
No |
| Supply Range |
-100V - +100V, -75 - +75V |
| Output Current |
5.5 mA |
| Offset Voltage, typ |
10 mV |
| Slew Rate |
17, 15 Volts/usec |
| Mono/Stereo |
Stereo |
| Temperature Min |
-20 deg C |
| Temperature Max |
75 deg C |
| Channels |
2 Channels |
| Automotive |
Yes |
Typical Performance
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Connection Diagram
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Datasheet
Package Availability, Models, Samples & Pricing
General Description
The LM4702 is a high fidelity audio power amplifier driver designed for demanding consumer and pro-audio applications. Amplifier output power may be scaled by changing the supply voltage and number of output devices. The LM4702 is capable of delivering in excess of 300 watts per channel single ended into an 8 ohm load in the presence of 10% high line headroom and 20% supply regulation.
The LM4702 includes thermal shut down circuitry that activates when the die temperature exceeds 150°C. The LM4702's mute function, when activated, mutes the input drive signal and forces the amplifier output to a quiescent state.
The LM4702 is available in 3 grades that span a wide range of applications and performance levels. The LM4702C is targeted at high volume applications. The LM4702B includes a higher voltage rating along with the tighter specifications. The LM4702A* (in development) is the premium part with the highest voltage rating, fully specified with limits over voltage and temperature, and is offered in a military 883 compliant TO-3 package.
* Tentative Max Operating voltage for the LM4702A (in development)
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
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LM4702BTA | VIP III H/HU2 | 0 | 2366 | 0 | 0 | 702554 | 6 | 199351615
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LM4702CTA | VIP III H/HU2 | 0 | 2366 | 0 | 0 | 702554 | 6 | 199351615
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Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1645: Application Note 1645 LM4702 Driving a MOSFET Output Stage |
655
Kbytes |
24-May-07 |
Download |
AN-1645 (Chinese): Application Note 1645 LM4702 Driving a MOSFET Output Stage
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894 Kbytes |
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| AN-1490: Application Note 1490 LM4702 Power Amplifier |
1033
Kbytes |
26-May-06 |
Download |
AN-1490 (Chinese): Application Note 1490 LM4702 Power Amplifier
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575 Kbytes |
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[Information as of 7-Nov-2009]
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RoHS Compliance Information
