ECL4871
3W Audio Power Amplifier With Shutdown Mode
General Description
The ELN4871 is a bridge-connected audio power amplifier capable of delivering typically 3W of continuous average power to an 3Ω load with10% (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 ELN4871 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is
optionally suited for low-power portable systems. The ELN4871 features an externally controlled, low-power
consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain
stable ELN4871 can be configured by external gain-setting resistors.
Features
◆No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
◆Small Outline packaging
◆Unity-gain stable
◆External gain configuration capability
◆Thermal shutdown protection
Applications
◆Portable Computers
◆Desktop Computers
◆Low Voltage Audio Systems
Key Specifications
◆Power Output @10% THD+N & VDD=5V 1KHZ
RL=3Ω 3W (TYP)
RL=4Ω 2.5W (TYP)
◆THD+N@ 1KHZ 1W 8Ω 0.5%(MAX)
◆Shutdown current 0.1uA(TYP.)
Supply voltage 2.0V~6.0V
Pin Configuration
Ordering Information
ECL4871 NN XX R
R：Tape & Reel
Package Type：
M1：SOP8
MH：ESOP8
Operating Ratings
Temperature Range
◆TMIN ≤ TA ≤ TMAX------------------------------------------------------------------------------------------ −40°C ≤ TA ≤ 85°C
◆Supply Voltage ----------------------------------------------------------------------------------------------- 2.0V ≤ VDD ≤ 6.0V
Pin Function Description
Pin Name | Pin Number | I/O | Function Description |
SHUTDOWN | 1 | I | Shutdown terminal (active high logic) |
BYPASS | 2 |
| Adding a bypass capacitor |
+IN | 3 | I | Channel positive input |
-IN | 4 | I | Channel negative input |
VO1 | 5 | O | Channel output 1 |
VDD | 6 |
| Power supply |
GND | 7 |
| High-current ground |
VO2 | 8 | O | Channel output 2 |
Absolute Maximum Ratings
Parameter | Symbol | Value | Unit |
Supply Voltage | VDD | -0.3—6.5 | V |
Input Voltage | VIN | -0.3—VDD+0.3 | V |
Power Output | — | Internal limit |
|
Junction Temperature | — | -150 | ℃ |
Storage Temperature | Tstg | -65—150 | ℃ |
ESD Susceptibility | - | 8000 | V |
Function Block Diagram
Electrical Characteristics
(VDD = 5V Unless otherwise specified. Limits apply for TA = 25°C.)
Symbol | Parameters | Test Conditions | Min. | Typ. | Max. | Unit |
VDD | Supply voltage |
| 2.0 |
| 6.0 | V |
IDD | Quiescent Power Supply Current | VIN = 0V, IO = 0A |
| 6.5 | 10 | mA |
ISD | Shutdown Current | VSHUTDOWN = VDD |
| 0.1 | 2 | μA |
PO | Output Power | THD+N = 1%; f = 1 kHz RL=3Ω RL=4Ω RL=8Ω |
| 2.38 2 1.2 |
| W |
THD+N = 10%; f = 1 kHz RL=3Ω RL=4Ω RL=8Ω |
| 3 2.5 1.5 |
| W | ||
THD+N | Total Harmonic Distortion+Noise | AVD=2; 20Hz<=f<=20kHz RL=4Ω,PO=1.6W RL=8Ω,PO=1W |
| 0.13 0.25 |
| % |
Typical Performance Characteristics
