APA4863

Features:

• Depop Circuitry Integrated
• Thermal Shutdown Circuitry Integrated
• Bridge-Tied Load (BTL) or Single-Ended (SE) Modes Operation
• Output Power at 1% THD+N, V_DD=5V
- 2.2W/Ch (typ) into a 3 Load
- 1.8W/Ch (typ) into a 4 Load
- 1.2 W/Ch (typ) into a 8 Load
• Shutdown Control Mode, I_SD= 0.5 A
• Output Power (SE) at 0.5% THD+N, V_DD=5V
- 90mW/Ch (typ.) into a 32 Load
• Various Power Packages Available SOP, TSSOP, TSSOP-P




Application

• Stereo Audio Power Amplifier for Notebook Computer
• Portable Televisions
• Portable and Desktop Computers




Specifications

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

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 3/4/8 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 32 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 4 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 A (typ.) .