UNISONIC TECHNOLOGIES CO., LTD PA4838

Transcription

1 UNISONIC TECHNOLOGIES CO., LTD PA4838 STEREO W AUDIO POWER AMPLIFIERS WITH DC VOLUME CONTROL AND LECTABLE GAIN DESCRIPTION The UTC PA4838 is a monolithic integrated circuit and designed to provide DC volume control with minimum amount of external components, and stereo bridged audio power amplifiers capable of producing W into 4Ω or.w into 3Ω with less than.% THD. The UTC PA4838 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suitable for multimedia monitors, portable radios, desk top, and other portable applications. The UTC PA4838 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance. FEATURES * DC Volume Control Interface * System Beep Detect * Stereo switchable bridged/single-ended power amplifiers * Selectable internal/external gain and bass boost * Click and pop suppression circuitry * Thermal shutdown protection ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing PA4838L-P8-R PA4838G-P8-R TSSOP-8 Tape Reel PA4838L-N8-R PA4838G-N8-R HTSSOP-8 Tape Reel MARKING of 4 Copyright 7 Unisonic Technologies Co., Ltd QW-R-.E

2 PIN CONFIGURATION GND 8 Right Out+ Shutdown Gain Select V DD Right Out- Mode 4 Right Gain Mute V DD DC Vol GND Right Dock Right In Right Gain GND Bypass HP Sense GND Left Gain Beep In Left In 8 7 Left Gain Left Out- Left Dock 3 6 V DD GND 4 Left Out+ PIN DESCRIPTION PIN NO PIN NAME I/O DESCRIPTION, 8, 4,, 3 GND Power ground Shutdown I Shutdown mode control input, high active. Place PA4838 into shutdown mode, when held high 3 Gain Select I Gain select input. Applying to V DD select the external gain mode. Applying V to this pin selects the internally set unit gain. 4 Mode I Mode select input. Mode, selected by applying V to this pin forces the PA4838 to effectively function as a line-out unity-gain amplifier. Mode, apply V DD to mode pin to use the internal DC control volume. At mode, the amplifier gain accords to the DC voltage applied to the DC Vol pin. DO NOT let the mode pin float. Mute I Mute input, active high. Muting the amplifier and DOCK outputs when held high. DO NOT let the mute pin float. 6, 6, 7 V DD Power supply 7 DC Vol I Internal stereo volume control input, the setting is a function of DC voltage applied to this pin. 9 Right Dock O Output of the right side internal amplifier which drive the volume control input. Right In I Input of the right side internal amplifier Beep In I Beep signal input, a mono input that accepts the beep signal to accommodate system alert signal. Left In I Input of the left side internal amplifier 3 Left Dock O Output of the left side internal amplifier which drive the volume control input. Left Out+ O Left side speaker output high 7 Left Out- O Left side speaker output low 8 Left Gain I Connect to resistor can adjust the differential gain of the left side output stage 9 Left Gain I Connect to resistor can adjust the differential gain of the left side output stage HP Sense I Headphone control input, applying a voltage between 4V and V DD can turn off the amps that drive the Left Out+ & Right Out+ pins. Bypass I Connecting a capacitor for low noise performance and high PSRR. 4 Right Gain I Connect to resistor can adjust the differential gain of the right side output stage Right Gain I Connect to resistor can adjust the differential gain of the right side output stage 6 Right Out+ O Right side speaker output high 8 Right Out- O Right side speaker output low UNISONIC TECHNOLOGIES CO., LTD of 4 QW-R-.E

3 BLOCK DIAGRAM Left Dock Internal gain select kω kω Mode Mute HP Sense DC Vol control kω kω kω kω Left In.33μF Beep In Right In.33μF Shutdown VDD GND Mode Control Beep Detect Power Management Bias Volume Control 3 steps kω kω kω kω kω kω kω kω kω.68μf -Left Out +Left Out +Right Out - Right Out kω Bypass Click and Pop Suppression Circuitry.68μF Right Dock kω kω UNISONIC TECHNOLOGIES CO., LTD 3 of 4 QW-R-.E

4 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Supply Voltage V DD 6. V Supply Voltage(Recommended Operating Range) V DD.7 ~.V V Input Voltage V IN -.3 ~ V DD +.3 V Power Dissipation P D Internally limited Junction Temperature T J + Operation Temperature (Ta) T OPR -4 ~ +8 Storage Temperature T STG -4 ~ + Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER SYMBOL RATINGS UNIT TSSOP-8 C/W θ JA HTSSOP-8 93 C/W VThermal Resistance TSSOP-8 C/W θ JC HTSSOP-8 C/W Note: The θ JA of HTSSOP is given that exposed die attach pad is not soldered on PCB. ELECTRICAL CHARACTERISTICS (V DD =V, Ta =, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT ENTIRE IC Supply Voltage V DD.7. V Headphone Sense High Input Voltage V IH 4 V Headphone Sense Low Input Voltage V IL.8 V Quiescent Power Supply Current I DD V IN =V, I OUT =A 3 ma Shutdown Current I SD V SHUTDOWN =V DD.7. μa VOLUME ATTENUATORS Attenuator Range C RANGE Gain with V DCVOL =V, No Load ±.7 db Attenuation with V DCVOI =V (BM & ) -7 db Mute Attenuation A M V MUTE =V, Bridged Mode (BM) -78 db V MUTE =V, Single-Ended Mode () -78 db SINGLE-ENDED MODE OPERATION Output Power P OUT THD=.%, f=khz, R L =3Ω 8 mw THD=%, f=khz, R L =3Ω 9 mw Total Harmonic Distortion + Noise THD+N V OUT =V RMS, f=khz, R L =kω, A VD =.6 % Power Supply Rejection Ratio PSRR C B =.μf, f=hz, V RIPPLE =mv rms 8 db Channel Separation X TALK f=khz, C B =.μf 6 db Signal to Noise Ratio SNR P OUT =7mW, R L =3Ω, A-Wtd Filter db UNISONIC TECHNOLOGIES CO., LTD 4 of 4 QW-R-.E

5 ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT BRIDGED MODE OPERATION Output Offset Voltage V OS V IN =V, No Load - + mv THD+N=.%, f=khz, R L =3Ω. W Output Power P OUT THD+N=.%, f=khz, R L =4Ω W THD=%(max), f=khz, R L =8Ω.. W THD+N=%, f=khz, R L =8Ω. W Total Harmonic Distortion+ Noise P OUT =W, R L =8Ω, A VD =, Hz<f<kHz.3 % THD+N POUT =34mW, R L =3Ω. % Power Supply Rejection Ratio PSRR C B =.μf, f=hz, R L =8Ω V RIPPLE =mv rms 74 db Channel Separation X TALK F=kHz, C B =.μf 7 db Signal to Noise Ratio SNR V DD =V, P OUT =.W, R L =8Ω A -Wtd Filter 93 db TRUTH TABLE FOR LOGIC INPUTS Gain Sel Mode Headphone Sense Mute Shutdown Output Stage Set To DC Volume Output Stage Configuration Internal Gain Fixed Internal Gain Fixed Internal Gain Adjustable Internal Gain Adjustable External Gain Fixed External Gain Fixed External Gain Adjustable External Gain Adjustable X X X Muted X Muted X X X X Shutdown X X Note: If system beep is detected on the Beep In pin, the system beep will be passed through the bridged amplifier regardless of the logic of the Mute and HP sense pins. UNISONIC TECHNOLOGIES CO., LTD of 4 QW-R-.E

6 TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 of 4 QW-R-.E

7 TYPICAL CHARACTERISTICS For HTSSOP-8 Total Harmonic Ditortion +Noise, THD+N (%) UNISONIC TECHNOLOGIES CO., LTD 7 of 4 QW-R-.E

8 TYPICAL CHARACTERISTICS (Cont.) VDD = V R L =kω Vin=Vrms AV= AV=4 AV= k k k k k Frequency (Hz).... VDD=3.3 V RL=8Ω P OUT =mw AV= AV=4 AV=. k k k k k Frequency (Hz) UNISONIC TECHNOLOGIES CO., LTD 8 of 4 QW-R-.E

9 TYPICAL CHARACTERISTICS (Cont.) No filter No filter A_wtd filter A_wtd filter VDD=V RL =8Ω AV =V/V k k k k k Frequency (Hz) VDD=V RL =kω AV =V/V k k k k k Frequency (Hz) - -4 VDD =V R L=3Ω P OUT =7mW A V=V/ V Crosstalk (db) -6-8 f=khz - f=khz - k k k k k Frequency (Hz) CF=.μF Gain (dbv) 8 6 CF=.68μF CF=.μF PRSS (dbga) 4 VDD=V RL=8Ω AV=V/V k k k k k Frequency (Hz) UNISONIC TECHNOLOGIES CO., LTD 9 of 4 QW-R-.E

10 TYPICAL CHARACTERISTICS (Cont.).... VDD= V RL =4Ω f=khz f=khz f=hz. m m 3m m 8m V DD =V RL=8Ω f=khz f=khz f=hz. m m m m m m.... VDD = V RL =6Ω f=khz f=khz f=hz. m m m m m m..... V DD =V R L =3 Ω f=khz f=hz f=khz.. m m 3m m 7m m m UNISONIC TECHNOLOGIES CO., LTD of 4 QW-R-.E

11 TYPICAL CHARACTERISTICS (Cont.).... VDD=3.3V RL=4Ω f=khz f=khz f=hz. m m m m m m.... VDD=3.3V RL=8Ω. m m 3m m f=khz f=khz f=hz 8m m 4m 8m..... m VDD=3.3V RL=6Ω f=khz f=khz f=hz m 3m m 7m m m.... VDD=3.3V RL=8Ω f=khz f=hz f=khz. m m 3m m 7m m m Total Harmonic Distortion+Noise, THD+N (%)..... m VDD=3.3V RL =3Ω m f=khz f=khz f=hz m m m 3m3m 4m m UNISONIC TECHNOLOGIES CO., LTD of 4 QW-R-.E

12 TYPICAL CHARACTERISTICS (Cont.). Power Disspation, PD (W) Power Disspation, PD (W) RL=3Ω RL =6Ω... RL=8Ω VDD=V THD<% RL=3Ω RL=6Ω. VDD =V THD<%.7.. RL=8Ω m VDD=V RL =kω f=khz f=khz f=hz m 3m m 8m 3 Output Volltage (V) Total Harmonic Distortion+Noise, THD+N (%) Total Harmonic Distortion+Noise, THD+N (%) UNISONIC TECHNOLOGIES CO., LTD of 4 QW-R-.E

13 TYPICAL CHARACTERISTICS (Cont.) Total Harmonic Distortion+Noise, THD+N (%) VDD =3.3V RL=kΩ docking f=khz f=khz f=hz m m 3m m 7m Output Volltage (V) Attenuation (db).8.6 VDD =V RL =8Ω Supply Current, IDD (ma) THD=% THD=% Supply Voltage, VDD (V). 3. VDD=V. THD=% THD=% LoadResistance (Ω) UNISONIC TECHNOLOGIES CO., LTD 3 of 4 QW-R-.E

14 TYPICAL CHARACTERISTICS (cont.) THD=% THD=% Load Resistance (Ω) VDD=3.3V VDD=3.3V THD=%.6 THD=% Load Resistance (Ω) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD 4 of 4 QW-R-.E