Features: Available in space-saving packages: LLP, micro SMD, MSOP, and SOIC
Ultra low current shutdown mode
BTL output can drive capacitive loads up to 500pF
Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions
2.2 - 5.5V operation
No output coupling capacitors, snubber networks or bootstrap capacitors required
Thermal shutdown protection
Unity-gain stable
External gain configuration capability Headphone amplifier modeApplication Mobile Phones
PDAs
Portable electronic devicesPinout
SpecificationsSupply Voltage ...............................................6.0V
Storage Temperature .............−65°C to +150°C
Input Voltage ........................−0.3V to VDD +0.3V
Power Dissipation (Note 3) .......Internally Limited
ESD Susceptibility (Note 4) .........................2500V
ESD Susceptibility (Note 5)........................... 250V
Junction Temperature ................................150°C
Thermal Resistance
JC (SOP) ................................................35°C/W
JA (SOP) ..............................................150°C/W
JA (micro SMD)..................................... 220°C/W
JC (MSOP) .............................................56°C/W
JA (MSOP) ............................................190°C/W
JA (LLP) 220°..................................C/W (Note 9)
Soldering Information
See AN-1112 'microSMD Wafers Level Chip Scale
Package'.
See AN-1187 'Leadless Leadframe Package (LLP)'.
| Power@ 8Ohms, 1% THD |
1 Watt |
| Power@ 8Ohms, 10% THD |
1.2 Watt |
| THD |
0.1 % |
| PSRR |
66 dB |
| SNR |
105 dB |
| Channels |
1 Channels |
| Supply Range |
+2.0 - +5.5 V |
| THD Conditions |
Po=.4Wrms@Vs=5 f=1kHz, BW=10Hz-80Hz |
| PSRR Conditions |
f = 1kHz |
| User Supply |
5 Volt |
| Shutdown Type |
Low |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
DescriptionThe LM4892 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8 BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. Switching between bridged speaker mode and headphone (single-ended) mode is accomplished using the headphone sense pin.
Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. The LM4892 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.
The LM4892 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4892 features an internal thermal shutdown protection mechanism.
The LM4892 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions.
The LM4892 is unity-gain stable and can be configured by external gain-setting resistors.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4892ITP |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4892ITPX |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4892M |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4892MM |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4892MMX |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4892MX |
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.
LM4892 Data Sheet
