ECL2011
Mono 1W Filterless Non-Clip class-D Audio Power Amplifier
General Description
ECL2011 is a 1W (RL=8Ω) Class-D audio power amplifier. ECL2011 uses the filter-less method allowing the
Speaker to be directly connected to the output and features low-level distortion and noise characteristics.
ECL2011 has non-clip function to control gain automatically and prevent output signal from being clipped at the
supply voltage. ECL2011 has over-current and over-temperature protection function, under-voltage locked function, as well as EMI noise and pop noise reduction functions. The ECL2011 is available in MSOP8, SOP8 and SOT23-6 packages.
Features
◆1.0W Output at 1% THD with 8Ωload at 5V Power Supply
◆Filter less, Low Quiescent Current and Low EMI
◆High Efficiency up to 89%
◆Soft Start Function
◆VULO and OCP Protection
◆Thermal Shutdown
◆Pb-Free Package
Applications
◆Wireless or Cellular Handsets and PDAs
◆Personal Navigation devices
◆General Portable Audio devices
Application Information
Ordering Information
ECL2011 N XX R
R：Tape & Reel
Package Type：
M1：SOP8
R1：MSOP8
B3：SOT23-6
N |
| Device orientation: |
R | Embossed Tape: Standard Feed | |
L | Embossed Tape: Reverse Feed |
Marking Information
Part No. | Marking | Information |
ECL2011NM1R |
| The second and line the third line stand for the company’s quality tracking information. |
ECL2011NR1R |
| |
ECL2011NB3R |
| ① D：ECL2011 ② 1：Output Power 1W ③ A：Single Audio Input B：Full Differential Input ④ 0～9，A～Z repeated (G，I，J，O，Q，W are excepted) Notes: "• "represents the batch number. "• "says" 1 ", dot not said "0"; For example: dot on the top of the "③", and the top right of the "④", said "010010", used to track the product batch. |
Pin Configuration
Pin Function Description
Pin Number | Pin Name | Function Description | ||
SOT23-6 | MSOP8 | SOP8 | ||
4 | 1 | 1 | SD | Chip Enable |
- | 2 | 2 | NC | Not connected |
3 | 3 | 3 | INP | Positive Input |
- | 4 | 4 | INN | Negative Input |
6 | 5 | 5 | OUTP | Positive Output |
5 | 6 | 6 | VDD | Power Supply |
2 | 7 | 7 | GND | Ground |
1 | 8 | 8 | OUTN | Negative Output |
Function Block Diagram
Absolute Maximum Ratings
Parameter | Symbol | Max | Unit |
Supply Voltage | VDD | VSS-0.3～VSS+6 | V |
Enable Voltage | SD | VSS-0.3～VIN+0.3 | |
Power Dissipation | PD@TA=25℃ SOT-23-6L | - | W |
PD@TA=25℃ SOP8 | - | ||
PD@TA=25℃ MSOP8 |
| ||
Package Thermal Resistance | SOT23-6 | - | ℃/W |
MSOP8 | - | ||
SOP8 |
| ||
Lead Temperature | - | 260 | °C |
Ambient Temperature | Topa | -40～+85 | |
Storage Temperature | Tstr | -65～+125 | |
ESD Susceptibility | HBM | 4000 | V |
Electrical Characteristics
(VEN= VDD =3.6V, Gain=24dB, RL=8Ω,TA=25℃,unless otherwise specification)
Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit | |
Supply Voltage Range | VDD | - | 2.5 | - | 5.5 | V | |
Quiescent Current | IQ | VSD=3.6V, No load | - | 2.6 | 8 | mA | |
Shutdown Current | ISHDN | VEN=0V | - | - | 1 | uA | |
High-level input voltage | SD | - | 1.3 | - | - | V | |
Low-level input voltage | SD | - | - | - | 0.4 | ||
Drain-Source On State Resistance | RDS(ON) | IDS=100mA | P MOSFET | - | 450 | - | mΩ |
N MOSFET | - | 300 | - | ||||
Output offset voltage | VOS |
| - | ±8 | - | mV | |
Output Power | PO | VDD=3.6V, THD+N=1%, f=1kHz | - | 0.65 | - | W | |
VDD=4.2V, THD+N=1%, f=1kHz | - | 0.80 | - | ||||
VDD=5.5V, THD+N=1%, f=1kHz | - | 1.1 | - | ||||
Total Harmonic Distortion Plus Noise | THD+N | RL=8Ω, PO=200mW | - | 0.2 | - | % | |
RL=8Ω, PO=500mW | - | 0.3 | - | ||||
Peak Efficiency | η | - | - | 89 | - | % | |
AC Power Supply Ripple Rejection Gain | PSRR | No input, f=1kHz, VPP=200mV | - | 24 | - | dB | |
Oscillator Frequency | fOSC | - | - | 300 | - | kHz | |
UVLO Threshold | VUVLO | Wake up | 2.0 | 2.15 | 2.3 | V | |
Hysteresis | - | 50 | - | mV | |||
Logic Input Leak Current | ILKC_EN | A 250kΩresistor connected SD from GND | 6 | - | 40 | uA | |
Thermal Shutdown | TSD | Shutdown Temperature | - | 160 | - | ℃ | |
Hysteresis | - | 25 | - | ℃ | |||
Non-Clip Attack Time | TATA | - | - | 40 | - | ms | |
Non-Clip Release Time | TRLA | - | - | 1.2 | - | s | |
Start Time | TSTUP | - | - | 200 | - | ms | |
Power-down Time | TPD | - | - | 15 | - | ms | |
Application Information
The ECL2011 is a fully differential amplifier with differential inputs and outputs. The fully differential amplifier consists of a differential amplifier and a common-mode amplifier. The differential amplifier ensures that the amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. The common-mode voltage at the output is biased around VDD/2 regardless of the common-mode voltage at the input.
Non-Clip Function
Non-Clip function automatically controls the PWM amplifier gain so as not to clip the output signals even if the speaker output is clipped at the supply voltage.
Quick Start/Quick Mute Function
Pop noise reduction circuit operates at startup or shutdown of the speaker amplifier. This function reduces intermittent sound considerably and eliminates uncomfortable feeling. Quick Start/Quick Mute is a pop noise reduction function with the gain controlling of the first amplifier stage.
Maximum Gain
The ECL2011 has two internal amplifier stages. The first stage’s gain is externally configurable, while the second stage’s is internally fixed. The gain of the first stage is set by selecting the ratio of RF to RI while the second stage’s gain is fixed at 2x. The differential total gain for IC is
The ECL2011 sets maximum RF=160kΩ, minimum RI=20kΩ, so the maximum closed-gain is 24dB.
Input Capacitor CI
In typical application, an input capacitor, CI, is required to allow the amplifier to bias input signals to a proper DC level for optimum operation. A high pass filter with a corner frequency determined by CI and the minimum input impedance RI.
Further consideration for capacitor is the leakage path from the input source through the input network (RI, RF, CI) to the load. This leakage current creates a DC offset voltage at the input to the amplifier that reduces useful headroom. For this reason, a low leakage tantalum or ceramic capacitor is the best choice.
Power Supply Decoupling CS
The ECL2011 requires adequate power supply decoupling to ensure the THD and PSRR as low as possible. Optimum decoupling is achieved by using two capacitors of different types that target different types of noise on the power supply leads. For higher frequency transients, a low equivalent-series-resistance (ESR) ceramic capacitor (1uF) is good, placing it as close as possible to the device VDD terminal. For filtering lower-frequency noise signals, capacitor of 10uF or larger, closely located to near the audio power amplifier is recommended.
Shutdown Operation
The shutdown feature of the ECL2011 turns the amplifier off when a logic low is applied on the SD pin. A 250kΩ resistor is connected from the SD pin to Pin GND. For the best power on/off pop performance, the amplifier should be set in the shutdown mode prior to power on/off operation.
Under Voltage Lock-Out
The ECL2011 incorporates circuitry to direct low on or off voltage. When the supply voltage drops to 2.1V or below, the ECL2011 goes into a state of shutdown, and the device comes out of its shutdown state and starts to normal operation by reset the power supply or SD pin.
Package Information
SOT23-6
Symbol | Dimensions In Millimeters | Dimensions In Inches | ||
Min | Max | Min | Max | |
A | 1.050 | 1.250 | 0.041 | 0.049 |
A1 | 0.000 | 0.100 | 0.000 | 0.004 |
A2 | 1.050 | 1.150 | 0.041 | 0.045 |
b | 0.300 | 0.500 | 0.012 | 0.020 |
c | 0.100 | 0.200 | 0.004 | 0.008 |
D | 2.820 | 3.020 | 0.111 | 0.119 |
E | 1.500 | 1.700 | 0.059 | 0.067 |
E1 | 2.650 | 2.950 | 0.104 | 0.116 |
e | 0.950(BSC) | 0.037(BSC) | ||
e1 | 1.800 | 2.000 | 0.071 | 0.079 |
L | 0.300 | 0.600 | 0.012 | 0.024 |
θ | 0° | 8° | 0° | 8° |
SOP8
Symbol | Dimensions In Millimeters | Dimensions In Inches | ||
Min | Max | Min | Max | |
A | 1.350 | 1.750 | 0.053 | 0.069 |
A1 | 0.050 | 0.150 | 0.002 | 0.006 |
A2 | 1.350 | 1.550 | 0.053 | 0.061 |
b | 0.330 | 0.510 | 0.013 | 0.020 |
c | 0.170 | 0.250 | 0.007 | 0.010 |
D | 4.700 | 5.100 | 0.185 | 0.200 |
E | 3.800 | 4.000 | 0.150 | 0.157 |
E1 | 5.800 | 6.200 | 0.228 | 0.244 |
e | 1.270(BSC) | 0.050(BSC) | ||
L | 0.400 | 1.270 | 0.016 | 0.050 |
θ | 0° | 8° | 0° | 8° |
MSOP8
Symbol | Dimensions In Millimeters | Dimensions In Inches | ||
Min | Max | Min | Max | |
A | 0.820 | 1.100 | 0.032 | 0.043 |
A1 | 0.020 | 0.150 | 0.001 | 0.006 |
A2 | 0.750 | 0.950 | 0.030 | 0.037 |
b | 0.250 | 0.380 | 0.010 | 0.015 |
c | 0.090 | 0.230 | 0.004 | 0.009 |
D | 2.900 | 3.100 | 0.114 | 0.122 |
E | 2.900 | 3.100 | 0.114 | 0.122 |
E1 | 4.750 | 5.050 | 0.187 | 0.199 |
e | 0.650(BSC) | 0.026(BSC) | ||
L | 0.400 | 0.800 | 0.016 | 0.031 |
θ | 0° | 6° | 0° | 6° |
