Phitips Semiconductors Audio/Radio Products Product specification Low voltage mono/stereo power amplifier TDA7050 GENERAL DESCRIPTION The TDA7050 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 Vp Total quiescent current (at Vp = 3 V) ltot Bridge tied load application (BTL) Output power at Ry = 32 2 Vp =3 V; dtot = 10% Po D.C. output offset voltage between the outputs |AV} Noise output voltage (r.m.s. value} at f= 1kHz; Rg =5kQ Vnotrms) Stereo application Output power at Ry = 32 2 tot = 10%; Vp =3V Po dtot = 10%; Vp = 4,5 Vv Py Channel separation at Rg = 0 22; f = 1 kHz a Noise output voltage (r.m.s. value) at f=1kHz; Rg =5kQ Vno(rms) 1,6 to 6,0 V typ. 3,2 mA typ. 140 mW max. 70 mV typ. 140 nV typ. 35 mW typ. 75 mW typ. 40 dB typ. 100 uV PACKAGE OUTLINE 8-lead DIL; plastic (SOTQ7). June 1989 1~151 Philips Semiconductors Audio/Radio Products Product specification Low voltage mono/stereo power amplifier TDA7050 RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) Supply voltage Vp max, 6V Peak output current 'omM max, 150 mA Total power dissipation see derating curve Fig. 1 Storage temperature range Tstq 55 to +150 C Crystal temperature Te max. 100 C A.C. and d.c, short-circuit duration at Vp = 3,0 V (during mishandling) tse max. 5 s 400 72913651 Prot (nw) 300 200 100 0 ~50 0 50 100 150 Tamb (C} Fig. 1 Power derating curve. THERMAL RESISTANCE From junction to ambient Rthia = 110 K/W June 1989 1-152 Phitips Semiconductors Audio/Radio Products Product specification Low voltage mono/stereo power amplifier TDA7050 CHARACTERISTICS Vp=3V;f=1 kHz; RL = 32 Q; Tampb = 25 OC; unless otherwise specified parameter symbol min, typ. max, unit Supply Supply voltage Vp 1,6 - 6,0 Vv Total quiescent current Itot - 3,2 4 mA Bridge-tied load application (BTL); see Fig. 4 Output power* Vp = 3,0 V; deot = 10% Po - 140 - mW Vp = 4,5 V; deot = 10% (Ry = 64 2) Po - 150 - mw Voltage gain Gy - 32 - dB Noise output voltage (r.m.s. value) Rs =5kQ; f= 1 kHz Vno(rms) - 140 - uv Rs =0 2; f = 500 kHz; B = 5 kHz Vno(rms) - tbf - uv D.C. output offset voltage (at Rg = 5 kQ} [AV] - ~ 70 mV Input impedance (at Rg = o) |Z; | 1 - - MQ Input bias current iF _ 40 - nA Stereo application; see Fig. 5 Output power* Vp = 3,0 V; drot = 10% Po - 35 mW Vp = 4,5 V; dtot = 10% Po - 75 - mW Voltage gain Gy 24.5 26 27.5 dB -_ Noise output voltage (r.m.s. value) Rg =5kQ; f= 1 kHz Vnolrms) - 100 - uv Rs = 0 2; f = 500 kHz; B = 5 kHz Vno(rms) - tbf - uv Channel separation Rg =0 22; f= 1 kHz a 30 40 - dB Input impedance (at Rg = o>} IZ; | 2 - MQ Input bias current iF - 20 - nA * Output power is measured directly at the output pins of the IC. {t is shown as a function of the supply voltage in Fig. 2 (BTL application) and Fig. 3 (stereo application). June 1989 1-153 Philips Semiconductors Audio/Radio Products Product specification Low voltage mono/stereo power amplifier TDA7050 7291366 200 {mW} 100 50 20 0 2 4 Vp IVI 6 Fig. 2 Output power across the load impedance (R,_) as a function of supply voltage (Vp) in BTL application. Measurements were made at f = 1 KHZ; dtgt = 10%; Tamb = 25 OC. APPLICATION INFORMATION 7291367 200 Po (mW} 100 50 20 10 0 2 4 piv) & Fig. 3 Output power across the load impedance (R\_) as a function of supply voltage (Vp) in stereo application. Measurements were made at f = 1 kHz; dtot = 10%; Tamb = 25 OC. Vp Vp . left channel input 8 input I8 Rg Rg 22 Vis 22 2]- kQ 2 7 kQ 1 7 y . + 50 + (fo i, BF 7050 R RL TDA705 E L right channel TDA7050 input % Rs 4 22 3 + rN 6 ko wT 6 3 A y * 50 i 7 uF RL 5 5 7291364 a 7291363 ae 7 Fig. 4 Application diagram (BTL); also used as test circuit. June 1989 Fig. 5 Application diagram (stereo); also used as test circuit.