UNISONIC TECHNOLOGIES CO., LTD DUAL 2.2W AUDIO AMPLIFIER PLUS STEREO HEADPHONE FUNCTION DESCRIPTION The UTC L4863 is a dual bridge-connected audio power amplifier. It combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip to simplify audio system design. In addition, the headphone input pin allows the amplifiers to operate in single-ended mode when driving stereo headphones. The IC could deliver different power by packages as below (when connected to a 5V supply with less than.0% THD+N.): - HTSSOP-20, 4Ω load: 2.2W - HTSSOP-20, 3Ω load: 2.5W(with forced-air cooled) - SOP/DIP, 8Ω load:.w. The UTC L4863 features an externally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce clicks and pops during device turn-on. FEATURES *Pb-free plating product number: L4863L * Click and pop suppression * Thermal shutdown protection * Unity-gain stable * Stereo headphone amplifier mode ORDERING INFORMATION Ordering Number Normal Lead Free Plating Package Packing L4863-D6-T L4863L-D6-T DIP-6 Tube L4863-S6-R L4863L-S6-R SOP-6 Tape Reel L4863-S6-T L4863L-S6-T SOP-6 Tube L4863-S8-R L4863L-S8-R SOP-8 Tape Reel L4863-S8-T L4863L-S8-T SOP-8 Tube L4863-N20-R L4863L-N20-R HTSSOP-20 Tape Reel L4863-N20-T L4863L-N20-T HTSSOP-20 Tube of Copyright 2007 Unisonic Technologies Co., Ltd
PIN CONFIGURATION DIP-6/SOP-6 SOP-8 SHUTDOWN 2 6 5 HP-IN SHUTDOWN 8 2 7 HP-IN +OUT A 3 4 +OUT B +OUT A 3 6 +OUT B -OUT A -IN A 4 5 6 3 2 -OUT B -IN B -OUT A -IN A 4 5 6 5 4 3 -OUT B -IN B +IN A 7 8 9 BYPASS +IN B +IN A 7 8 2 BYPASS +IN B 9 HTSSOP-20 SHUTDOWN +OUT A -OUT A -IN A +IN A 20 2 9 3 8 4 7 5 6 6 5 7 4 8 3 9 2 HP-IN +OUT B -OUT B -IN B BYPASS +IN B PIN DESCRIPTION PIN NO. DIP-6/SOP-6 SOP-8 HTSSOP-20 PIN NAME I/O PIN DESCRIPTION 4,3 4,5 4,7 Supply voltage 2,7,5 2,7,9,,7 2,7,9,,,2,9 Ground 2 4 BYPASS Internal mid-supply bias reference bypassing SHUTDOWN I Entire IC into the shutdown mode when this pin connected to the 6 8 20 HP-IN I Output mode select, connected to the for SE mode or for BTL mode 8 8 8 +INA I Non-inverting input of channel A, connected to BYPASS pin inside the IC 6 6 6 -INA I Inverting input of channel A 3 3 3 +OUTA Channel A + output in BTL mode, high impedance in O SE mode 5 5 5 -OUTA O Channel A - output in BTL mode, + output in SE mode 9 3 +INB I Non-inverting input of channel B, connected to BYPASS pin inside the IC 3 5 -INB I Inverting input of channel B 4 6 8 +OUTB Channel B + output in BTL mode, high impedance in O SE mode 2 4 6 -OUTB O Channel B - output in BTL mode, + output in SE mode UNISONIC TECHNOLOGIES CO., LTD 2 of
ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage 6.0 V Recommended Supply Voltage Range 2.0 ~ 5.5 V Input Voltage V IN -0.3 ~ +0.3 V Power Dissipation P D Internally limited Junction Temperature T J +25 Operating Temperature T OPR -40 ~ +85 Storage Temperature T STG -65 ~ +50 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 SOP-6 80 /W Thermal Resistance (Junction to Ambient) SOP-8 90 /W θ JA DIP-6 63 /W HTSSOP-20 90 /W SOP-6 20 /W Thermal Resistance (Junction to Case) SOP-8 2 /W θ JC DIP-6 20 /W HTSSOP-20 2 /W ELECTRICAL CHARACTERISTICS (Notes )( =5V, Ta =25, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT FOR ENTIRE IC Supply Voltage 2 5.5 V Quiescent Power Supply Current V IN =0V, I OUT =0A, HP-IN=0V 6.5 20 I DD (Note 2) V IN =0V, I OUT =0A, HP-IN=4V 5.8 ma Shutdown Current I SD applied to the SHUTDOWN pin 2 0.7 µa Headphone Input Voltage High V IH 4 V Low V IL 0.8 V FOR BRIDGED-MODE OPERATION Output Offset Voltage V O(OFF) V IN =0V 5 50 mv R L =3Ω 2.5 THD=%, f=khz R L =4Ω 2.2 HTSSOP-20 Output Power R L =3Ω 3.2 THD+N=%, f=khz (measured at the device P OUT R L =4Ω 2.7 W terminals) THD=%, f=khz R L =8Ω.0. SOP/DIP THD+N=%, f=khz R L =8Ω.5 W THD+N=%, f=khz, RL=32Ω 0.34 W Total Harmonic HTSSOP-20 R L =4Ω, P OUT =2W 0.3 THD+N 20Hz f 20kHz, Distortion + Noise SOP/DIP A VD =2 R L =8Ω, P OUT =W 0.3 % Power Supply Rejection Ratio PSRR =5V, V RIPPLE =200mV RMS, R L =8Ω, C B =.0µF 67 db Channel Separation XTALK f=khz, C B =.0µF 90 db Signal To Noise Ratio SNR =5V, P OUT =.W, R L =8Ω 98 db UNISONIC TECHNOLOGIES CO., LTD 3 of
ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT FOR SINGLE-ENDED OPERATION Output Offset Voltage V O(OFF) V IN =0V 5 50 mv THD=0.5%, f=khz, R L =32Ω 75 85 Output Power P OUT THD+N=%, f=khz, R L =8Ω 340 mw THD+N=%, f=khz, R L =8Ω 440 Total Harmonic Distortion + Noise THD+N A V=-, P OUT =75mW,20Hz f 20kHz, R L =32Ω 0.2 % Power Supply Rejection Ratio PSRR C B =.0µF, V RIPPLE =200mV RMS, f=khz 52 db Channel Separation X TALK f=khz, C B =.0µF 60 db Signal To Noise Ratio SNR =5V, P OUT =340mW, R L =8Ω 95 db Note:. All voltages are measured with respect to the ground () pins, unless otherwise specified. 2. Depends on the offset voltage when a practical load is connected to the amplifier. 3. When driving 3Ω or 4Ω and operating on a 5V supply, the HTSSOP-20 package must be mounted to the circuit board that has a minimum of 2.5 in 2 of exposed, uninterrupted copper area connected to the exposed-dap. UNISONIC TECHNOLOGIES CO., LTD 4 of
TYPICAL APPLICATION CIRCUIT Audio Input Audio Input C I µf C I µf To Control Pin on Headphone jack R F 20K R I 20K C B (CB size) 0.33µF R I 20K R F 20K 0k 0K 6 8 -IN A +IN A Bypass -IN B 9 +IN B 4,3 Shutdown 6 HP-IN C S + 0.µF TANT - AMP A + 20K 50K /2 50K - AMP B + 20K 2,7,5 C O 0µF + -OUT A 5 20K CONTROL PIN R L k RING 8 20K - 3 To HP-IN Circuit AMP 2A + +OUT A C O SLEEVE 0µF TIP 2 + HEADPHONE JACK -OUT B 20K 20K - 4 AMP 2B + +OUT B Note: Pin out shown for DIP-6 and SOP-6 packages. Refer to the PIN CONFIGURATION for the pin out of other packages. R L 8 k EXTERNAL COMPONENTS DESCRIPTION Figure.Typical Audio Amplifier Application Circuit Components R I C I R F C S C B Functional Description The inverting input resistance, along with R F, set the closed-loop gain. R I, along with C I form a high pass filter with fc=/(2r I C I ) The input coupling capacitor blocks DC voltage at the amplifier s input terminals. C I, along with R I, create a high pass filter with fc=/(2r I C I ). Refer to the section. Selecting Proper External Components, for an explanation of determine the value of C I. The feedback resistance, along with R I, set the closed-ioop gain. The supply bypass capacitor. Refer to the Power Supply Bypassing section for information about properly placing and selecting the value of, this capacitor. The capacitor, C B, filters the half-supply voltage present on the Bypass pin. Refer to the Selecting Proper External Components section for information concerning proper placement and selecting C B S value. UNISONIC TECHNOLOGIES CO., LTD 5 of
TYPICAL CHARACTERISTICS (For HTSSOP-20) THD+N vs Output Power =5V, R L =4 BW<80kHz THD+N vs Frequency =5V, R L =4 P OUT =2.0W, BW<80kHz 20Hz 20KHz 0. 0. 0.0 KHz 0 m 0. 3 Level (W) 0.0 0 20 0 k k 20k Frequency (Hz) Power Dissipation (W) UNISONIC TECHNOLOGIES CO., LTD 6 of
TYPICAL CHARACTERISTICS(Cont.) (For DIP-6, SOP-6 and SOP-8) THD+N(%) THD+N (%) UNISONIC TECHNOLOGIES CO., LTD 7 of
TYPICAL CHARACTERISTICS(Cont.) THD+N vs Output Power =-3.3V, A VD = -2 R L =4 THD+N vs Frequency =3.3V, A VD =-2 P OUT =750mW, R L =4 0. f=khz f=20khz f=20hz 0. 0.0 m 0. 2 Level (W) 0.0 20 0 k k 20k Frequency (Hz) 00 800 600 400 200 Output Power vs Load Resistance =3.3V, A V = - f=khz, BW<80kHz THD+N=% THD+N=% 0 0 20 30 Load Resistance (Ω) 40 800 600 400 200 Power Dissipation vs Supply Voltage =3.3V Single-ended 4Ω 8Ω 6Ω 0 0 250 500 750 00 Power Out (mw) UNISONIC TECHNOLOGIES CO., LTD 8 of
TYPICAL CHARACTERISTICS(Cont.) Output Power (W) Output Power (W) Output Power (W) Output Power (W) 0.8 0.6 Output Power vs Load resistance =5V f=khz A V =- Single Ended BW<80kHz 0.7 0.6 0.5 0.4 Output Power vs Supply Voltage R L =8Ω 0.4 % THD+N 0.2 % THD+N 0 0 20 30 40 50 60 Load Resistance (Ω) 70 0.3 0.2 0. 0 2 2.5 R L =6Ω R L =32Ω =5V f=khz THD+N.0% Bridged Load BW<80kHz 0.5 0.75 Output Power (W).25 UNISONIC TECHNOLOGIES CO., LTD 9 of
TYPICAL CHARACTERISTICS(Cont.) Power Dissipation (W) Output Noise Voltage (µv) Output Level (db) Output Level (db) PSRR (db) GAIN (db) Phase ( o ) UNISONIC TECHNOLOGIES CO., LTD of
TYPICAL CHARACTERISTICS(Cont.) Supply Current (ma) 5 2 9 6 3 Supply Current vs Supply Voltage BRIDGED (HP-IN=) 0 2 2.5 V IN =0V No Load SINGLE-ENDED (HP-IN= ) 3 3.5 4 4.5 5 Supply Voltage (V) 5.5 Dropout Voltage ( V ) 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 of