APA2020A

Features:

• Low Supply Current , I_DD= 8mA at Stereo BTL
• Low Shutdown Current , I_DD= 0.5A
• Depop Circuitry Integrated
• Low Supply Voltage
• Thermal Shutdown Circuitry Integrated
• Output Power at 1% THD+N , V_DD=5V
     - 1.8 W/Ch (typ) into a 4 Load
     - 1.2 W/Ch (typ) into a 8 Load
• Bridge-Tied Load (BTL) or Single-Ended (SE) Modes Operation
• Various 24-Pin Power Packages Available SOP , TSSOP-P
• High Supply Voltage Ripple Rejection


Application

• Stereo Audio Power Amplifier for Notebook Computer


Specifications

Symbol	Parameter	Rating	Unit
VCC	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	300	°C
VESD	Electrostatic Discharge	-3000 to 3000 *1 -200 to 200 *2	V

Description

The APA2020A is a stereo bridge-tied audio power amplifier in various 24-pin power packages , including SOP , TSSOP-P. When connecting to a 5V voltage supply , the APA2020A is capable of delivering 1.8W/1.2W of continuous RMS power per channel into 4/8 loads with less than 1% THD+N , respectively. The APA2020A simplifies design and frees up board space for other features .

The APA2020A also served well in low-voltage applications , which provides 800-mW 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 APA2020A , that reduces pops and clicks noise during power up and when using the shutdown or mute modes and protects the
chip from being destroyed by over-temperature failure.

To simplify the audio system design in notebook computer applications , the APA2020A combines a stereo bridge-tied loads (BTL) mode for speaker drive and a stereo single-end (SE) mode for headphone drive into a single chip , where both modes are easily switched by the SE/BTL input control pin signal . For power sensitive applications , the APA2020A also features a shutdown function which keeps the supply current only 0.5 A (typ) .