ECL4890
Low-Cost, Mono/Stereo, 1 W Differential Audio Power Amplifiers
General Description
The ELN4890 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 8Ω BTL load with less than 1% distortion (THD+N) from a 5V DC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The ELN4890 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 ELN4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the ELN4890 features an internal thermal shutdown protection mechanism. The ELN4890 contains advanced pop & click circuitry which eliminates
noises which would otherwise occur during turn-on and turn-off transitions. The ELN4890 is unity-gain stable and can be configured by external gain-setting resistors.
Features
◆Available in space-saving packages
◆Ultra low current shutdown mode
◆BTL output can drive capacitive loads
◆Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
◆2.2 - 5.0V operation
◆No output coupling capacitors, snubber networks or bootstrap capacitors required
◆Thermal shutdown protection
◆Unity-gain stable
◆External gain configuration capability
Applications
◆Mobile Phones
◆PDAs
◆Portable electronic devices
Key Specifications
◆PSRR @fIN =217Hz, VDD = 5V 62dB(typ.)
◆Power Output @VDD= 5.0V &1% THD 1W(typ.)
Pin Configuration
Ordering/ Marking Information
ECL4890 N XX R
R：Tape & Reel
Package Type：
M1：SOP8
R1：MSOP8
N | A | When the input is greater than 5.2V IC will automatically shut down |
C | No high voltage automatic closing function | |
D | No high voltage automatic closing function, and under the high pressure, the gain will be automatically reduced to 1 times |
Part No. | Marking | information |
ECL4890NM1R | LN4890 XXXX | XXXX：Date Code |
ECL4890NR1R |
Operating Ratings
Temperature Range
◆TMIN ≤ TA ≤ TMAX----------------------------------------------------------------------------------------------- -40°C ≤ TA ≤ 85°C
◆Supply Voltage ---------------------------------------------------------------------------------------------------- 2.2V ≤ VDD ≤ 5.0V
Pin Function Description
Pin Number | Pin Name | Function Description |
1 | SHUTDOWN | Chip Enable (Low Effective) |
2 | BYPASS | Bypass Capacitance Input Pin |
3 | +IN | Positive Input Terminal (Differential +) |
4 | -IN | Negative Input Terminal (Differential -) |
5 | VO1 | Negative Output Terminal (Differential -) |
6 | VDD | Power Supply |
7 | GND | Ground Pin |
8 | VO2 | Positive Output Terminal (Differential +) |
Typical Application Circuit
Absolute Maximum Ratings
Parameter | Symbol | Value | Unit |
Supply Voltage | VDD | -0.3—5.0 | V |
Input Voltage | VIN | -0.3—VDD+0.3 | V |
Operation Temperature | Topr | -40—85 | ℃ |
Storage Temperature | Tstg | -65—150 | ℃ |
ESD Susceptibility | - | 2000 | V |
Function Block Diagram
Electrical Characteristics
(VDD = 5V Unless otherwise specified. Limits apply for TA = 25°C.)
Parameter | Symbol | Condition | Min | Typ | Max | Unit |
IDD | Quiescent Power Supply Current | VIN = 0V, Io = 0A, No Load | — | 4 | 8 | mA |
VIN = 0V, Io = 0A, 8Ω Load | — | 5 | 10 | mA | ||
ISD | Shutdown Current | VSHUTDOWN = 0V | — | 0.1 | 2 | μA |
VSDIH | Shutdown Voltage Input High |
| 1.2 | — | — | V |
VSDIL | Shutdown Voltage Input Low |
| — | — | 0.4 | V |
VOS | Output Offset Voltage |
| — | 7 | 50 | mV |
ROUT-GND | Resistor Output to GND |
| 7.0 | 8.5 | 9.7 | kΩ |
PO | Output Power ( 8Ω ) | THD = 2% (max); f = 1 kHz 8Ω Load | 0.8 | 1.0 | — | W |
TWU | Wake-up time |
| — | 170 | 220 | ms |
TSD | Thermal Shutdown Temperature |
| 150 | 170 | 190 | ℃ |
THD+N | Total Harmonic Distortion+Noise | Po = 0.4 Wrms; f = 1kHz | — | 0.1 | — | % |
PSRR | Power Supply Rejection Ratio | Vripple = 200mV sine p-p f=217Hz | 55 | 62 | — | dB |
Vripple = 200mV sine p-p f=1kHz | 66 | |||||
TSDT | Shut Down Time | 8Ω Load | — | 1.0 | — | ms |
(VDD = 3V Unless otherwise specified. Limits apply for TA = 25°C.)
Parameter | Symbol | Condition | Min | Typ | Max | Unit | ||
IDD | Quiescent Power Supply Current | VIN = 0V, Io = 0A, No Load | — | 3.5 | 7 | mA | ||
VIN = 0V, Io = 0A, 8Ω Load | — | 4.5 | 9 | mA | ||||
ISD | Shutdown Current | VSHUTDOWN = 0V | — | 0.1 | 2 | μA | ||
VSDIH | Shutdown Voltage Input High |
| 1.2 | — | — | V | ||
VSDIL | Shutdown Voltage Input Low |
| — | — | 0.4 | V | ||
VOS | Output Ofsett Voltage |
| — | 7 | 50 | mV | ||
ROUT-GND | Resistor Output to GND |
| 7.0 | 8.5 | 9.7 | kΩ | ||
PO | Output Power ( 8Ω ) | THD = 2% (max); f = 1 kHz 8Ω Load | 0.28 | 0.31 | — | W | ||
TWU | Wake-up time |
| — | 170 | 220 | ms | ||
TSD | Thermal Shutdown Temperature |
| 150 | 170 | 190 | ℃ | ||
THD+N | Total Harmonic Distortion+Noise | Po = 0.4 Wrms; f = 1kHz | — | 0.1 | — | % | ||
PSRR | Power Supply Rejection Ratio | Vripple = 200mV sine p-p f=217Hz | 45 | 56 | — | dB | ||
Vripple = 200mV sine p-p f=1kHz | 62 | |||||||
(VDD = 2.6V Unless otherwise specified. Limits apply for TA = 25°C.)
Parameter | Symbol | Condition | Min | Typ | Max | Unit | ||
IDD | Quiescent Power Supply Current | VIN = 0V, Io = 0A, No Load | — | 2.6 | 5.5 | mA | ||
ISD |
| VSHUTDOWN = 0V | — | 0.1 | 2 | μA | ||
PO | Output Power ( 8Ω ) | THD = 1% (max);f = 1 kHz | 8Ω Load |
| 0.2 | — | W | |
4Ω Load | 0.22 | |||||||
THD+N | Total Harmonic Distortion+Noise | Po = 0.1 Wrms; f = 1kHz | — | 0.08 | — | % | ||
PSRR | Power Supply Rejection Ratio | Vripple = 200mV sine p-p f=217Hz | — | 44 | — | dB | ||
Vripple = 200mV sine p-p f=1kHz | 44 | |||||||
Typical Performance Characteristics
