UNISONIC TECHNOLOGIES CO., LTD PA7468 Preliminary CMOS IC STEREO 2.6W AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL DESCRIPTION As an audio power amplifier with DC volume control, UTC PA7468 is a stereo bridged audio power amplifier. In normal operation it can produce 2.6Ω (1.8W) into 4W with less than 10% (1.0%) THD+N. In UTC PA7468, the attenuator range of the volume control is from 20dB (@DC_VOL=0V) to -80dB (@DC_VOL=3.54V) with 32 steps. Besides, the UTC PA7468 includes the depop circuitry and the thermal shutdown protection circuitry (to reduce pops and clicks noise during power up or shutdown mode operation). The UTC PA7468 has a BTL mode for speaker drive and a SE mode for headphone drive. These tow modes can be quickly chosen by the SE/ BTL input control pin signal. FEATURES * Low Operating Current: 9mA *Two Output Modes Allowable with BTL and SE Modes(chosen by SE/ BTL pin) *Low Current Consumption :1mA(in Shutdown Mode) *With Short Circuit Protection *With Thermal Shutdown Protection *With Over Current Protection Circuitry *Eliminating Turn-on and Turn-off Transients in Outputs by Improved Depop Circuitry to. *Very High PSRR *32 Steps Volume Adjustable *BTL Mode :2.6W per Channel Output Power into 4Ω Load at 5V ORDERING INFORMATION Ordering Number Lead Free PA7468L-S16-R PA7468L-S16-T Halogen Free PA7468G-S16-R PA7468G-S16-T www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing SOP-16 SOP-16 Tape Reel Tube 1 of 6 QW-R502-322.b PA7468 Preliminary CMOS IC PIN CONFIGURATION MUTE 1 16 ROUT- SHUTDOWN 2 15 VDD RIN- 3 14 ROUT+ BYPASS 4 13 SE/BTL GND 5 12 GND LIN- 6 11 LOUT + VOLUME 7 10 VDD VOLMAX 8 9 LOUT- PIN DESCRIPTION PIN NO. 1 PIN NAME MUTE 2 SHUTDOWN 3 4 5.12 6 7 RINBYPASS GND LINVOLUME 8 VOLMAX 9 10, 15 11 13 14 16 LOUTVDD LOUT+ SE/ BTL ROUT+ ROUT- DESCRIPTION Input pin for mute controlling: low for normal operation; high to mute. When this pin is pulled low the chip will be into shutdown mode. ISD= 1μA Right channel input pin Pin for bias voltage generator Ground Left channel input pin Volume gain setting input signal. Pin for setting the maximum output swing. Inputting VC to this pin, the output voltage swing will be clamped between VOH- VC & VOL + VC. Connecting GND to this pin will disable the function. For this pin, the max input voltage must be ≤1/2 VDD. Left channel’s negative output in BTL mode; high impedance in SE mode. Supply voltage Left channel’s positive output in BTL mode and SE mode Output mode control input, high :SE output mode ,low :for BTL mode. Right channel’s positive output in BTL mode and SE mode Right channel’s negative output in BTL mode ;high impedance in SE mode. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-322.b PA7468 Preliminary CMOS IC BLOCK DIAGRAM LIN- 6 RIN- 3 VOLUME 7 VOLMAX 8 1 SE/BTL 13 SHUTDOWN 2 9 LOUT- 4 BYPASS 14 ROUT+ 16 ROUT- MUTE SE/BTL POWER and DEPOP CIRCUIT SHUTDOWN CKT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LOUT+ Volume Control BYPASS MUTE 11 10 15 VDD 12 5 GND 3 of 6 QW-R502-322.b PA7468 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER Supply Voltage SYMBOL VDD RATINGS -0.3 ~ +6.0 UNIT V VIN -0.3 ~ VDD+0.3 V Input Voltage (SE/ BTL , SHUTDOWN , MUTE) Power Dissipation PD Internal Limited W Junction Temperature TJ 150 °C Storage Temperature TSTG -65 ~ +150 °C 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 Junction to Ambient SYMBOL θJA UNIT °C/W RATINGS 4.5 ~ 5.5 UNIT V 2.0 V 4.0 V 1.0 V RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL VDD Supply Voltage High Threshold Voltage Low SHUTDOWN , MUTE SE/ BTL SHUTDOWN , MUTE SE/ BTL Common Mode Input Voltage Ambient Temperature RATINGS 90 VIH VIL VICM TA 1.0 V VDD-1.0 -40 ~ 85 V °C ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified) VDD = 5V PARAMETER Output Differential Voltage SYMBOL VOS Supply Current IDD Supply Current in Shutdown Mode ISD High Input Current Low Input Current IIH IIL TEST CONDITIONS MIN SE/ BTL =0V 9 20 mA SE/ BTL =5V 4 10 mA SE/ BTL =0V, SHUTDOWN =0V Operating Characteristics, BTL mode (VDD = 5V, RL = 4Ω, Gain = 2V/V) PARAMETER SYMBOL TEST CONDITIONS THD+N=10%, fIN=1kHz Maximum Output Power POUT THD+N=1%, fIN=1kHz Total Harmonic Distortion Plus Noise Power Ripple Rejection Ratio Channel Separation Signal to Noise Ratio MIN RL=3Ω RL=4Ω RL=8Ω RL=3Ω RL=4Ω RL=8Ω POUT =1.2W, RL= 4Ω, fIN=1kHz THD+N POUT =0.9W, RL= 8Ω, fIN=1kHz PSRR VRR=0.1Vrms, RL=8Ω, CB=1μF, fIN=120Hz Crosstalk CB =1μF, RL=8Ω, fIN=1kHz S/N POUT=1.1W, RL=8Ω, A Weighting UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP MAX UNIT 5 mV 1 1 μA 900 900 nA nA TYP MAX UNIT 2.9 W 2.6 W 1.6 W 2.4 W 1.8 W 1.3 W 0.07 % 0.08 % 60 dB 90 dB 95 dB 4 of 6 QW-R502-322.b PA7468 Preliminary CMOS IC ELECTRICAL CHARACTERISTICS(Cont.) Operating Characteristics, SE mode (VDD = 5V, Gain = 1V/V) PARAMETER SYMBOL TEST CONDITIONS Maximum Output Power Total Harmonic Distortion Plus Noise Power Ripple Rejection Ratio Channel Separation Signal to Noise Ratio MIN RL= 16Ω THD+N=10%, fIN=1kHz RL= 32Ω POUT RL= 16Ω THD+N=1%, fIN=1kHz RL= 32Ω POUT=125mW, RL= 16Ω, fIN=1kHz THD+N POUT=65mW, RL= 32Ω, fIN=1kHz PSRR VIN=0.1Vrms, RL=8Ω, CB=1μF, fIN=120Hz Crosstalk CB=1μF, RL=32Ω, fIN=1kHz S/N POUT=75mW, SE, RL=32Ω, A Weighting TYP MAX UNIT 220 mW 120 mW 160 mW 95 mW 0.09 % 0.09 % 60 dB 60 dB 100 dB VOLUME CONTROL TABLE_BTL MODE (Supply Voltage VDD=5V) GAIN(DB) 20 18 16 14 12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 -34 -36 -38 -40 -80 HIGH(V) 0.12 0.23 0.34 0.46 0.57 0.69 0.80 0.91 1.03 1.14 1.25 1.37 1.48 1.59 1.71 1.82 1.93 2.05 2.16 2.28 2.39 2.50 2.62 2.73 2.84 2.96 3.07 3.18 3.30 3.41 3.52 5.00 LOW(V) 0.00 0.17 0.28 0.39 0.51 0.62 0.73 0.84 0.96 1.07 1.18 1.29 1.41 1.52 1.63 1.74 1.85 1.97 2.08 2.19 2.30 2.42 2.53 2.64 2.75 2.87 2.98 3.09 3.20 3.32 3.43 3.54 HYSTERESIS(MV) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 52 51 50 49 47 46 45 44 43 41 40 39 38 37 35 34 33 32 30 29 28 27 26 24 23 22 21 20 18 17 16 RECOMMENDED VOLTAGE(V) 0 0.20 0.31 0.43 0.54 0.65 0.77 0.88 0.99 1.10 1.22 1.33 1.44 1.56 1.67 1.78 1.89 2.01 2.12 2.23 2.35 2.46 2.57 2.69 2.80 2.91 3.02 3.14 3.25 3.36 3.48 5 5 of 6 QW-R502-322.b PA7468 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT 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 www.unisonic.com.tw 6 of 6 QW-R502-322.b