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| ILA7053 GENERAL DESCRIPTION The ILA7053 is an integrated class-B stereo power amplifier in a 16-lead dual-in-line (DIL) plastic package. The device, consisting of two BTL amplifiers, is primarily developed for portable audio applications but may also be used in mains-fed applications. Features * No external components * No switch-ON/OFF clicks * Good overall stability * Low power consumption * Short-circuit-proof. QUICK REFERENCE DATA PARAMETER Supply voltage range Total quiescent current Output power Internal voltage gain Total harmonic distortion PO=0.1W RL= RL=8 Vp=6V CONDITIONS SYMBOL Vp Itot PO GV THD MIN. 3 38 TYP. 6 9 1.2 39 0.2 MAX. 18 16 40 1.0 . UNIT V mA W dB % 2 X 1 W PORTABLE/MAINS-FED STEREO POWER AMPLIFIER PACKAGE OUTLINE 16-lead DIL; plastic (SOT38); SOT38-1; PINNING 1 2 3 4 5 6 7 8 SGND1 IN1 n.c. n.c. Vp IN2 SGND2 n.c. signal ground 1 input 1 not connected not connected supply voltage input 2 signal ground 2 not connected 9 10 11 12 13 14 15 16 OUT2A GND2 n.c. OUT2B OUT1B GND1 n.c. OUT1A output 2 (positive) power ground 2 not connected output 2 (negative) output 1 (negative) power ground 1 not connected output 1 (positive) Note The information contained within the parentheses refer to the polarity of the loudspeaker terminal to which the output must be connected. FUNCTIONAL DESCRIPTIO The ILA7053 is a stereo output amplifier, with an internal gain of 39 dB, which is primarily for use in portable audio applications but may also be used in mains-fed applications. The current trends in portable audio application design is to reduce the number of batteries which results in a reduction of output power when using conventional output stages. The ILA7053 overcomes this problem by using the Bridge-Tied-Load (BTL) principle and is capable of delivering 1.2 W into an 8 load (Vp = 6 V). The load can be short-circuited under all input conditions. RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) PARAMETER CONDITIONS SYMBOL MIN. MAX. UNIT Supply voltage Non-repetitive peak output current Crystal temperature Storage temperature range Vp IOSM TC Tstg -55 18 1.5 +150 +150 V A C C 1 ILA7053 CHARACTERISTICS Vp = 6 V; R(_ = 8 Q; Tamb = 25 C; unless otherwise specified; measured from test circuit, Fig.7. PARAMETER Supply voltage range Total quiescent current Input bias current Supply voltage ripple rejection Input impedance DC output offset voltage Noise output voltage (RMS value) Output power Total harmonic distortion Internal voltage gain Channel balance Channel separation Frequency response note 3 note 3 note 2 CONDITIONS RL =; note 1 SYMBOL Vp ltot Ibias SVRR Zi V13-16 V12-9 note 4 note 5 THD = 10% PO=0.1W Vno(rms) Vno(rms) PO THD GV Gv a f MIN. 3 40 38 40 TYP. 6 9 100 50 100 150 60 1.2 0.2 39 0.02 to 20 MAX. 18 16 300 100 100 300 1.0 40 1 UNIT V mA nA dB k mV mV mV mV W % dB dB dB kHz Notes to the characteristics 1. With a practical load the total quiescent current depends on the offset voltage. 2. Ripple rejection measured at the output with Rs = 0 and f =100 Hz to 10 kHz. The ripple voltage (200 mV) is applied to the positive supply rail. Rs = 5 k. The noise output voltage (RMS value) is measured with Rs = 5 k, unweighted and a bandwidth of 60 Hz to 15 kHz. The noise output voltage (RMS value) is measured with Rs = 0 and f = 500 kHz with 5 kHz bandwidth. If RL = 8 and LL = 200 mH the noise output current is only 100 nA. 2 |
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