APA4863
Stereo 2.2W Audio Power Amplifier
Features
•Depop Circuitry Integrated
•Thermal Shutdown Circuitry Integrated
•Bridge-Tied Load (BTL) or Single-Ended (SE) Modes Operation
•Output Power at 1% THD+N, VDD=5V
- 2.2W/Ch (typ) into a 3 Ω Load - 1.8W/Ch (typ) into a 4 Ω Load - 1.2 W/Ch (typ) into a 8 Ω Load
•Shutdown Control Mode, ISD= 0.5 µA
•Output Power (SE) at 0.5% THD+N, VDD=5V
- 90mW/Ch (typ.) into a 32Ω Load
•Various Power Packages Available SOP, TSSOP, TSSOP-P
Applications
•Stereo Audio Power Amplifier for Notebook Computer
•Portable Televisions
•Portable and Desktop Computers
General Description
The APA4863 is a stereo bridge-tied audio power amplifier in various power packages , including SOP , TSSOP and TSSOP-P . When connecting to a 5V voltage supply , the APA4863 is capable of delivering 2.2W/1.8W/1.2W of continuous RMS power per channel into 3Ω/ 4Ω/ 8Ω bridge-tied loads with less than 1% THD+N respectively . When APA4863 operates in the single-ended load , it is capable of delivering 90mW of continuous RMS power per channel into 32Ω load . The APA4863 simplifies design and frees up board space for other features .
The APA4863 also served well in low-voltage applications , which provides 750mW (1% THD+N) per channel into 4Ω loads with a 3.3V supply voltage . Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in the APA4863 , that reduces pops and clicks noise during power up and when using the shutdown mode and protects the chip from being destroyed by over-temperature failure . To simplify the audio system design in notebook computer applications , the APA4863 combines a stereo bridge-tied loads mode for speaker drive and a stereo single-end mode for headphone drive into a single chip , where both modes are easily switched by the HP-IN input control pin signal . For power sensitive applications , the APA4863 also features a shutdown function which keeps the supply current only 0.5 µA (typ.) .
Ordering Information
APA4863 |
Package Code |
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K: SOP |
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Handling Code |
O: TSSOP |
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R: TSSOP-P* |
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Temp. Range |
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Temp. Range |
I : -40 to 85 |
° C |
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Package Code |
Handling Code |
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TU : Tube |
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TR : Tape & Reel |
TY: Tray |
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* TSSOP-P is a standard TSSOP package with a thermal pad exposed on the bottom of the package.
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp. |
1 |
www.anpec.com.tw |
Rev. A.3 - Apr., 2001 |
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APA4863
Block Diagram
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VDD |
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CS |
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Audio |
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RF |
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0.1µ F |
4, 13 |
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Input |
R1 |
20KΩ |
6 |
- IN A |
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CO |
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- |
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- OUT A |
5 |
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20KΩ |
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8 |
+ IN A* |
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+ |
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C1 |
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+ |
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20KΩ |
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100µ F |
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1 µ F |
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20KΩ |
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Control |
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20KΩ |
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1KΩ |
Pin |
Ring |
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RL |
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Bypass |
50ΚΩ |
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+ OUT A |
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8Ω |
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10 |
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To HP-IN Circuit |
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CB |
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VDD / 2 |
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3 |
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2.2µ F |
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50KΩ |
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+ |
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Tip Sleeve |
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Audio |
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Input |
R1 |
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- IN B |
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11 |
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CO |
Headphone Jack |
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- |
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- OUT B |
12 |
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20KΩ |
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9 |
+ IN B* |
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+ |
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C1 |
R |
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+ |
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1 µ F |
F |
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20KΩ |
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20KΩ |
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100µ F |
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20KΩ |
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20KΩ |
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1KΩ |
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VDD |
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RL |
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8Ω |
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- |
+ OUT B |
14 |
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100ΚΩ |
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1 |
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Shutdown |
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+ |
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To Control Pin on |
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16 |
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HP-IN |
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Headphone Jack |
100KΩ |
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GND |
2,7,15 |
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* +INA and +INB pins are connected to Bypass pin inside the IC.
Absolute Maximum Ratings
(Over operating free-air temperature range unless otherwise noted.)
Symbol |
Parameter |
Rating |
Unit |
VDD |
Supply Voltage |
6 |
V |
TA |
Operating Ambient Temperature Range |
-40 to 85 |
° C |
TJ |
Maximum Junction Temperature |
150 |
° C |
TSTG |
Storage Temperature Range |
-65 to +150 |
° C |
TS |
Soldering Temperature,10 seconds |
260 |
° C |
VESD |
Electrostatic Discharge |
-2000 to 2000 *1 |
V |
Note: *1. Human body model : C=100pF, R=1500Ω , 3 positive pulses plus 3 negative pulses
Copyright ANPEC Electronics Corp. |
2 |
www.anpec.com.tw |
Rev. A.3 - Apr., 2001 |
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APA4863
Recommended Operating Conditions
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Min. |
Typ. |
Max. |
Unit |
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Supply Voltage, VDD |
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3 |
5 |
5.5 |
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Operating free-air |
VDD=5V, |
4-Ω stereo BTL drive, with |
-20 |
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85 |
° C |
temperature, TA |
250mW/Ch average |
proper PCB design |
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power |
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VDD=5V, |
4-Ω stereo BTL drive, with |
-20 |
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85 |
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1.8 W/Ch average |
proper PCB design and 300 |
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power |
CFM forced-air cooling |
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Common mode |
VDD=5 V |
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1.25 |
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4.5 |
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input voltage, VICM |
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V |
VDD=3.3V |
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1.25 |
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2.7 |
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Dissipation Rating Table
Package |
Air Flow |
Thermal Resistance |
TA≤ 25° C |
TA=70° C |
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(CFM) |
θ JA(° C/W) |
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SO16 + |
0 |
50 |
2.5W |
1.6W |
TSSOP ++ |
0 |
73.2 |
1.7W |
1.1W |
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200 |
66.6 |
1.8W |
1.2W |
TSSOP-P ++ |
0 |
37.6 |
3.3W |
2.1W |
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200 |
32.3 |
3.8W |
2.4W |
+ : The parameter is measured with the recommended copper heat sink pattern on an 2-layer PCB, 11.7 in2 3.0× 2.4 in2 in PCB,
1oz. copper, 3.0× 1.5 in2 in coverage at Top-layer and Bottom-layer at 100% coverage (7.2in2). ++:The parameter is measured with the JEDEC standard test boards (multi-layer PCB).
Electical Characteristics
Electrical Characteristics for Entire IC
The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C
Symbol |
Parameter |
Test Conditions |
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APA4863 |
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Min. |
Typ. |
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Max. |
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VDD |
Supply Voltage |
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3 |
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5.5 |
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IDD |
Quiescent Power Supply |
VIN=0V, IO=0A, HP-IN=0V |
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13.5 |
mA |
Current |
VIN=0V, IO=0A, HP-IN=4V |
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7.5 |
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ISD |
Shutdown Current |
VPIN1= VDD |
5 |
0.5 |
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µ A |
VIH |
Headphone High Input Voltage |
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4 |
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V |
VIL |
Headphone Low Input Voltage |
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0.8 |
V |
Copyright ANPEC Electronics Corp. |
3 |
www.anpec.com.tw |
Rev. A.3 - Apr., 2001 |
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APA4863
Electical Characteristics Cont.
Electrical Characteristics for BTL Mode Operation
The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C
Symbol |
Parameter |
Test Conditions |
APA4863 |
Unit |
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Typ. |
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VOS |
Output Offset Voltage |
VIN=0V |
5 |
mV |
PO |
Output Power |
THD=1%, f=1kHz |
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RL=3Ω |
2.2 |
W |
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RL=4Ω |
1.8 |
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RL=8Ω |
1.2 |
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THD=10%, f=1kHz |
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RL=3Ω |
2.7 |
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RL=4Ω |
2.3 |
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RL=8Ω |
1.5 |
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THD+N |
Total Harmonic Distortion + Noise |
AVD=2, f=1kHz |
0.3 |
% |
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RL=4Ω , PO=1.8W |
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RL=8Ω , PO =1W |
0.15 |
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RSRR |
Power Supply Rejection Ratio |
VDD=5V, VRIPPLE=200MvRms , RL=8Ω |
64 |
dB |
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CB=2.2µ F |
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XTALK |
Channel Separation |
f=1kHz , CB=2.2µ F, PO=1W, RL=8Ω |
90 |
dB |
SNR |
Signal-to-Noise Ratio |
VDD=5V, PO =1.1W, RL=8Ω |
95 |
dB |
Electrical Characteristics for SE Mode Operation
The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C
Symbol |
Parameter |
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Test Conditions |
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APA4863 |
Unit |
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Typ. |
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VOS |
Output Offset Voltage |
VIN=0V |
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5 |
mV |
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PO |
Output Power |
THD=0.5%, |
f=1kHz, RL=32Ω |
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90 |
mW |
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THD=1%, |
f=1kHz, RL=8Ω |
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320 |
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THD=10%, |
f=1kHz, RL=8Ω |
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400 |
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THD+N |
Total Harmonic Distortion |
AV= -1 , PO=75mW, f=1kHz, RL=32Ω |
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0.02 |
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plus Noise |
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RSRR |
Power Supply Rejection |
VRIPPLE=200mV RMS , f=1kHz, CB=2.2µ F, RL=8Ω |
49 |
dB |
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Ratio |
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XTALK |
Channel Separation |
f=1kHz , CB=2.2µ F, PO=32mW, RL=32Ω |
85 |
dB |
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SNR |
Signal-to-Noise Ratio |
VDD=5V , PO =340mW, RL=8Ω |
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95 |
dB |
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Truth Table for Logic Inputs |
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Shutdown |
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HP-IN |
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APA4863 Mode |
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Low |
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Low |
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Bridge -Tied |
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Low |
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High |
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Single-Ended |
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High |
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Low |
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APA4863 Shutdown |
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High |
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High |
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APA4863 Shutdown |
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Copyright ANPEC Electronics Corp. |
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4 |
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www.anpec.com.tw |
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Rev. A.3 - Apr., 2001 |
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APA4863
Pin Description
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HP-IN |
SHUTDOWN |
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1 |
16 |
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HP-IN |
SHUTDOWN |
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1 |
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GND |
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2 |
15 |
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GND |
GND |
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2 |
19 |
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GND |
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+ OUT A |
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3 |
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+ OUT B |
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+ OUT B |
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3 |
14 |
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+ OUT A |
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V |
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4 |
17 |
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VDD |
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VDD |
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4 |
13 |
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VDD |
DD |
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5 |
16 |
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- OUT B |
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- OUT A |
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6 |
15 |
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- IN B |
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- OUT A |
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5 |
12 |
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- OUT B |
- IN A |
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BYPASS |
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- IN A |
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6 |
11 |
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- IN B |
GND |
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7 |
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+ IN A |
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8 |
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+ IN B |
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GND |
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7 |
10 |
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BYPASS |
NC |
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9 |
12 |
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NC |
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8 |
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+ IN B |
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+ IN A |
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9 |
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NC |
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10 |
11 |
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NC |
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Top View for SOP
Top View for TSSOP
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HP-IN |
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SHUTDOWN |
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1 |
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GND |
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2 |
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19 |
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GND |
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+ OUT A |
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3 |
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18 |
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+ OUT B |
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VDD |
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4 |
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VDD |
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Thermal |
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- OUT A |
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- OUT B |
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Pad |
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- IN A |
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- IN B |
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BYPASS |
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GND |
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+ IN A |
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+ IN B |
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GND |
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GND |
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GND |
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GND |
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Top View |
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Bottom View |
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for TSSOP-P |
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for TSSOP -P |
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Pin Description |
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Name |
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I/O |
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Description |
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GND |
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Ground connection of circuitry |
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VDD |
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I |
Supply voltage input |
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+ INA |
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I |
Non-inverting input of channel A, connected to bypass pin inside the IC |
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- INA |
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I |
Input pin of channel A |
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+ OUT A |
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O |
A channel + output in BTL mode, high impedance in SE mode |
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- OUT A |
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O |
A channel - output in BTL mode, + output in SE mode |
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+ IN B |
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I |
Non-inverting input of channel B, connected to bypass pin inside the IC |
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- IN B |
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I |
Input pin of channel B |
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+ OUT B |
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O |
B channel + output in BTL mode, high impedance in SE mode |
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- OUT B |
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O |
B channel - output in BTL mode, + output in SE mode |
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BYPASS |
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Connect to voltage divider for internal mid-supply bias |
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HP-IN |
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I |
Headphone control pin input, hold high for single-ended mode operation |
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SHUTDOWN |
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I |
Shutdown mode control pin input, places entire IC in shutdown mode |
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when held high, IDD= 0.5 A |
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Copyright ANPEC Electronics Corp. |
5 |
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www.anpec.com.tw |
||||||||||||||
Rev. A.3 - Apr., 2001 |
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APA4863
Typical Characteristics
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10 |
THD+N vs Output Power |
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THD+N vs Frequency |
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10 |
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VDD=5V, RL=4Ω |
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VDD=5V, PO=1.8W |
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BW<80kHz |
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RL=4Ω, |
BW<80kHz |
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1 |
20Hz |
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1 |
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(%) |
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(%) |
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20kHz |
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THD+N |
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THD+N |
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1kHz |
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0.1 |
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0.1 |
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0.01 |
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0.01 |
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20 |
100 |
1k |
10k 20k |
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10m |
100m |
1 |
3 |
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Figure 1 : Output Power (W) |
Figure 2 : Frequency (Hz) |
Power Dissipation vs Output Power |
THD+N vs Frequency |
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1.4 |
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10 |
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1.2 |
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VDD=5V, PO=1W |
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RL=8Ω, BTL Mode |
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(W) |
1 VDD=5V |
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1 |
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Power Dissipation |
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0.8 |
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RL=4Ω |
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0.6 |
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AVD=10 |
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RL= 8Ω |
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0.1 |
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0.4 |
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THD+N(%) |
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AVD=2 |
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0.2 |
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0.01 |
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0 |
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20 |
100 |
1k |
10k 20k |
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0 |
0.5 |
1 |
1.5 |
2 |
2.5 |
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Figure 3 : Output Power (W) |
Figure 4 : Frequency (Hz) |
Copyright ANPEC Electronics Corp. |
6 |
www.anpec.com.tw |
Rev. A.3 - Apr., 2001 |
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