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TDA8551 Datasheet(PDF) 9 Page - NXP Semiconductors |
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TDA8551 Datasheet(HTML) 9 Page - NXP Semiconductors |
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9 / 20 page  1998 Feb 23 9 Philips Semiconductors Product specification 1 W BTL audio amplifier with digital volume control TDA8551 When a practical PCB layout is used with wider copper tracks and some extra copper added both to the IC pin connections and underneath the IC, the thermal resistance from junction to ambient can be reduced. Without these measures Rth j-a = 160 K/W for the SO8 package; see Chapter “Thermal characteristics”. The power dissipation can be calculated as follows: For a maximum ambient temperature of 50 °C, VP =5V and RL =8 Ω this results in a worst case sine wave dissipation of 0.63 W. Figures 5 to 15 represent test results obtained while using the test circuit given in Fig.4. The following test conditions apply: Tamb =25 °C; VP = 5 V; f = 1 kHz; RL =8 Ω; Gv = 20 dB; audio bandwidth from 22 Hz to 22 kHz (except for Figs 8 and 9); unless otherwise specified. P T amb R th j-a -------------- = Fig.5 Supply current as a function of supply voltage. handbook, halfpage 024 6 10 0 8 6 4 2 MGM554 VP (V) IP (mA) Fig.6 Total harmonic distortion as a function of output power at different frequencies. (1) f = 10 kHz. (2) f = 1 kHz. (3) f = 100 Hz. handbook, halfpage 10 10−1 1 10−2 MGM551 10−2 10−1 110 Po (W) THD (%) (3) (2) (1) Fig.7 Total harmonic distortion as a function of output power at different gains. f = 1 kHz. (1) Gv = 0 dB. (2) Gv = 7 dB. (3) Gv =20dB. handbook, halfpage 10 10−1 1 10−2 MGM552 10−2 10−1 110 Po (W) THD (%) (1) (2) (3) |
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