Features: · Pop & click circuitry eliminates noise during turn-on and turn-off transitions
· Low, 2µA (max) shutdown current
· Low, 12mA (typ) quiescent current
· 12Vp-p mono BTL output, load = 2µF + 30Ω,VDD =3V
· Short circuit protection
· Unity-gain stable
· External gain configuration capabilityApplication·Cellphone
·PDASpecifications
| THD |
0.05 % |
| THD Conditions |
Vout=10Vpp at Vcc=3V |
| Shutdown Type |
Low |
| THD Conditions |
Vout=10Vpp at Vcc=3V |
| Shutdown Type |
Low |
| View Using Catalog |
DescriptionThe LM4802B integrates a Boost Converter with an Audio Power Amplifier to drive Ceramic Speakers in portable applications. When powered by a 3V supply, it is capable of forcing 12Vp-p across a 2µF + 30 bridge-tied-load (BTL) with less than 1% THD+N.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4802B does not require bootstrap capacitors, or snubber circuits. Therefore it is ideally suited for portable applications requiring high output voltage and minimal size.
The LM4802B features a low-power consumption shutdown mode. Additionally, the LM4802B features an internal thermal shutdown protection mechanism.
The LM4802B contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.
The LM4802B is unity-gain stable. Its gain is set by external resistors.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4802BLQ |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4802BLQX |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
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.
LM4802B Data Sheet
