ESMT Preliminary AD5165A 2.5W Mono Filter-less Class-D Audio Amplifier Features Description z z z z z z z z z The AD5165A is a mono, filter-less class-D audio amplifier. Operating with 5.0V loudspeaker driver supply, it can deliver 2.5W output power into 4 Ω loudspeaker within 10% THD+N. Supply voltage range: 2.5 V to 5.5 V Support single-ended or differential analog input Low static operation current Low shut-down current Short power-on transient time Internal pull-low resistor on shut-down pins Short-circuit protection Over-temperature protection Loudspeaker power within 10% THD+N 1.5W/ch into 8Ω loudspeaker 2.5W/ch into 4Ω loudspeaker z Loudspeaker efficiency 89% @ 8Ω, THD+N=10% 84% @ 4Ω, THD+N=10% The AD5165A packaged as DFN 8L is a mono audio amplifier with high efficiency and suitable for the notebook computer, and portable multimedia devices. Ordering Information Part Number Package Comments AD5165A DFN 8L, 3x3 mm Pb-free Applications z z z z z Monitor audio PDA Portable multimedia devices Notebook computer Mobile phone Functional Block Diagram Gain=300k /Rin PVDD; AVDD Cs ~300k + Cin Differential input Cin - Rin INP + PWMA PWM Generator Rin - Loudspeaker Driver + INN PWMB ~300k -wave Generator SD# ~300k Overload, Voltage & Thermal Protection Thermal Pad; PGND Elite Semiconductor Memory Technology Inc. Publication Date: Sep. 2007 Revision: 0.1 1/12 ESMT Preliminary AD5165A Pin Assignments DFN 8L, 3x3mm SD# 1 8 PWMB AVDD 2 7 PGND INP 3 INN 4 6 9:Thermal Pad PVDD 5 PWMA Pin Description Pin NAME TYP DESCRIPTION 1 SD# I Shutdown AD5165A (Low active logic) 2 AVDD P Power Supply 3 INP I Positive differential input 4 INN I Negative differential input 5 PWMA O Positive output 6 PVDD P High current power supply 7 PGND G High current ground 8 PWMB O Negative output 9 Thermal Pad G Must be soldered to PCB’s ground plane Available Package Package Type Device no. θJA (oC/W) Exposed Thermal Pad DFN 8L (3x3) AD5165A 45.8 Yes Note1: The thermal pad is at the bottom of package. To optimize the performance of thermal dissipation, solder the thermal pad to PCB’s ground plane is suggested. Elite Semiconductor Memory Technology Inc. Publication Date: Sep. 2007 Revision: 0.1 2/12 ESMT Preliminary AD5165A Absolute Maximum Ratings SYMBOL PARAMETER MIN MAX UNIT AVDD Supply for lower power analog cells 2.5 5.0 V PVDD Supply for loudspeaker driver 2.5 5.0 V Input voltage -0.3 AVDD Tstg Ta Storage temperature -65 Ambient operating temperature V o C 150 0 o C 70 Recommended Operating Conditions SYMBOL PARAMETER TYP UNIT AVDD Supply for lower power analog cells 2.5~5.0 V PVDD Supply for loudspeaker driver 2.5~5.0 V VIH High-Level Input Voltage 2.0 V VIL Low-Level Input Voltage 0.8 Ta Ambient Operating Temperature V o C 0~70 General Electrical Characteristics SYMBOL PARAMETER IPD Supply current during power-down mode Voffset Output offset voltage fsw RSC CONDITION MIN AVDD=PVDD=5.0V; SD#=0 Input ac grounded, VDD=2.5V~5.0V TYP MAX UNIT 2 50 μA 5 25 mV Junction temperature for driver shutdown 145 150 155 Temperature hysteresis for recovery from shutdown 115 120 125 Switching rate of loudspeakers driver 300 450 600 kHz 2.8 3.2 Ω Loudspeaker short-circuit PVDD = 5 V detect resistance Elite Semiconductor Memory Technology Inc. o C o C Publication Date: Sep. 2007 Revision: 0.1 3/12