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| INTEGRAL ILA7050 LOW VOLTAGE MONO/STEREO POWER AMPLIFIER GENERAL DESCRIPTION The ILA7050 is a low voltage audio amplifier for small radios with headphones (such as watch, pen and pocket radios) in mono (bridge-tied load) or stereo applications. Features * Limited to battery supply application only (typ. 3 and 4 V) * Operates with supply voltage down to 1,6 V * No external components required * Very low quiescent current * Fixed integrated gain of 26 dB, floating differential input * Flexibility in use - mono BTL as well as stereo * Small dimension of encapsulation (see package design example) QUICK REFERENCE DATA Supply voltage range Total quiescent current (at Vp = 3 V) Bridge tied load application (BTL) Output power at R) = 32 Q Vp=3V;dtat=10% D.C. output offset voltage between the outputs Noise output voltage (r.m.s. value) at f = 1 kHz; Rg = 5 kfit Stereo application Output power at R( = 32 dtot = 10%; Vp = 3V dtot = 10%; Vp= 4,5V Channel separation at Rs = 0 ; f = 1 kHz Noise output voltage (r.m.s. value) at f = 1 kHz; Rs = 5 k PACKAGE OUTLINE 8-lead DIL; plastic (SOT97); SOT97-1; PO PO K Vno(rms) typ. typ. typ. typ. 35 mW 75 mW 40 dB 100 mV Vno(rms) typ. 140 mV PO Vp ltot 1,6 typ. to 6,0 V 3,2 mA typ. max. 140 mW 70 mV lAVI INTEGRAL CHARACTERISTICS Vp = 3 V; f = 1 kHz; RL = 32 0., Tamb = 25 C; unless otherwise specified PARAMETER SYMBOL MIN. TYP. MAX. UNIT Supply Supply voltage Total quiescent current Bridge-tied load application (BTL); see Fig.4 Output power; note 1 Vp = 3,0 V; diet = 10% Vp = 4,5 V; diet = 10% (RL = 64 Q) Voltage gain Noise output voltage (r.m.s. value) RS = 5 kQ.-, f = 1 kHz RS = 0 Q; f = 500 kHz; B =5 kHz D.C. output offset voltage (at Rs = 5 k) Input impedance (at Rs =) Input bias current Stereo application; Output power; note 1 Vp=3,OV;dtot=10% Vp=4,5V;dtot=10% Voltage gain Noise output voltage (r.m.s. value) RS = 5 k; f = 1 kHz RS = 0 ; f = 500 kHz; B =5 kHz Channel separation RS = 0 ; f = 1 kHz Input impedance (at Rs = ) Input bias current Vno(rms) Vno(rms) K IZjl Ii 30 2 100 tbf 40 20 mV mV dB M nA PO PO GV 24.5 35 75 26 27.5 mW mW dB Vno(rms) Vno(rms) lVI IZiI Ii 1 140 tbf 40 70 mV mV mV M nA PO PO GV 140 150 32 mW mW dB Vp Itot 1,6 3,2 6,0 4 V mA Note 1. Output power is measured directly at the output pins of the IC. It is shown as a function of the supply voltage in Fig.2 (BTL application) and Fig.3 (stereo application). Application diagram (BTL) Application diagram (stereo) |
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