APA4835RI-TR

APA4835 Stereo 2.8W Audio Power Amplifier with DC Volume Control and Selectable Gain Features • • • • • • • Operating Voltage : 3.3V to 5V Stereo switchable bridged/single-ended power amplifiers DC Volume Control Interface , 0dB to –105dB Low Supply Current , IDD = 13mA at Stereo BTL Low Shutdown Current , IDD = 0.7µA Bridge-Tied Load (BTL) or Single-Ended-(SE) Modes Operation Output Power at 1% THD+N , VDD=5V General Description The APA4835 is a monolithic integrated circuit , which provides DC volume control , and a stereo bridged audio power amplifiers capable of producing 2.8W (2.2W) into 3Ω with less than 10% (1.0%) THD+N. APA4835 includes a DC volume control , stereo bridge-tied and single-ended audio power amplifiers , stereo docking outputs , and a selectable gain control , that makes it optimally fittable for notebook PC , multimedia monitors , and other portable applications. The attenuator range of the volume control in APA4835 is from 0dB (DC_Vol=0.7VDD) to –105dB (DC_Vol=0V) with 32 steps. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in APA4835 , that reduces pops and clicks noise during power up or shutdown mode operation , and protects the chip from being destroyed by over temperature failure. To simplify the audio system design , APA4835 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. Besides the low supply current design to increase the efficiency of the amplifiers , APA4835 also features a shutdown function which keeps the supply current only 0.7µA (typ). • – 2.2W/Ch (typ) into a 3 Ω Load – 2.0W/Ch (typ) into a 4 Ω Load – 1.2W/Ch (typ) into a 8 Ω Load Output Power at 10% THD+N , VDD=5V • • • • • • • • – 2.8W/Ch (typ) into a 3 Ω Load – 2.3W/Ch (typ) into a 4 Ω Load – 1.5W/Ch (typ) into a 8Ω Load Single-ended mode at 1.0% THD+N – 95mW/Ch (typ) into 32Ω Load Depop Circuitry Integrated System Beep Detect Thermal shutdown protection circuitry High supply voltage ripple rejection Low Crossover Distortion PC99 Compliant 28-pin TSSOP-P (with enhanced thermal pad) power package available Pin Description GND SHUTDOWN Gain Select Mode Mute VDD DC Vol GND Right Dock Right In Beep In Left In Left Dock GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Right Out + VDD Right Out Right Gain 2 Right Gain 1 GND BYPASS HP Sense GND Left Gain 1 Left Gain 2 Left Out VDD Left Out + Applications • • • Notebook and Desktop Computers Multimedia Monitors Portable Applications 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. Rev. A.7 - Mar., 2003 1 www.anpec.com.tw APA4835 Ordering Information APA 4835 H a n d lin g C o d e T em p . R a ng e P ac kag e C o de P ackage C ode R : T S S O P -P Tem p. R ange I : -4 0 to 8 5 ° C H a n d lin g C o d e TU : Tube TR : Tape & R eel A P A4835 R : A P A4835 XXXXX X X X X X - D a te C o d e Block Diagram Internal gain select 20KΩ 20KΩ Mode Mute HP Sense DC Vol Control Left Dock 20KΩ 200KΩ 200KΩ 20KΩ 20KΩ 0.33µF 0.33 µF Right In Right Dock 20KΩ Shutdown VDD GND Left In Mode Control 10KΩ 10KΩ 20KΩ 0.068µF - Left Out + 20KΩ Bias + Volume Control 32 steps 20KΩ + 20KΩ + 10KΩ 10KΩ 20KΩ 0.068 µF 20KΩ + 20KΩ - Right Out 20KΩ Beep Detect Power Management Click and Pop Suppression Circuitry + + Left Out + Right Out Beep In Bypass Absolute Maximum Ratings (Over operating free-air temperature range unless otherwise noted.) Symbol VDD TA TJ T STG TS V ESD Parameter Supply Voltage Operating Ambient Temperature Range Maximum Junction Temperature Storage Temperature Range Soldering Temperature,10 seconds Electrostatic Discharge Rating 6 -40 to 85 Internally limited* 1 -65 to +150 260 -2000 to 2000*2 Unit V °C °C °C °C V Note :*1. APA4835 integrates internal thermal shutdown protection when junction temperature ramp up to 150°C. *2. Human body model : C=100pF, R=1500Ω, 3 positive pulses plus 3 negative pulses Copyright  ANPEC Electronics Corp. Rev. A.7 - Mar., 2003 2 www.anpec.com.tw APA4835 Thermal Characteristics Symbol RTHJA Parameter Thermal Resistance from Junction to Ambient in Free Air TSSOP-P* TSSOP-P** Rating 60 35 Unit °C/W *5in2 printed circuit board with 2oz trace and copper pad through 12 25mil diameter vias. The thermal pad on the TSSOP_P package without solder on the printed circuit board. **5in2 printed circuit board with 2oz trace and copper pad through 12 25mil diameter vias. The thermal pad on the TSSOP_P package with solder on the printed circuit board. Electical Characteristics Electrical Characteristics for Entire IC The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C Symbol VDD IDD ISD VIH VIL Parameter Supply Voltage Quiescent Power Supply Current Shutdown Current SE/BTL High Input Voltage SE/BTL Low Input Voltage Test Conditions Min. 3.3 VIN=0V, IO=0A VPIN 2= VDD 4 APA4835 Typ. Max. 5.5 13 25 0.7 2.0 0.8 Unit V mA µA V V Electrical Characteristics for Volume Attenuators The following specifications apply for VDD= 5V. Limits apply for TA= 25°C Symbol CRANGE AM Parameter Attenuator Range Mute Attenuation Test Conditions Min. Gain with VPIN 7=5V Attenuation with VPIN 7=0V VPIN 5=5V, Bridged Mode VPIN 5=5V, Single-Ended Mode -90 -88 -88 APA4835 Typ. Max. ±0.5 -105 Unit dB dB Electrical Characteristics for BTL Mode Operation The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C Symbol VOS PO Parameter Output Offset Voltage Output Power Test Conditions VIN=0V THD=1%, f=1kHz RL=3Ω RL=4Ω RL=8Ω THD=10%, f=1kHz RL=8Ω 3 APA4835 Typ. 5 2.2 2.0 1.2 1.5 Unit mV W Copyright  ANPEC Electronics Corp. Rev. A.7 - Mar., 2003 www.anpec.com.tw APA4835 Electical Characteristics (Cont.) Electrical Characteristics for BTL Mode Operation (Cont.) The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C Symbol THD+N Parameter Test Conditions APA4835 Typ. 0.2 0.15 0.1 74 95 95 30 Unit Total Harmonic Distortion + Noise AVD=2, 20Hz