Datenblatt-Suchmaschine für elektronische Bauteile |
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TDA2005L-J11-A-T Datenblatt(PDF) 7 Page - Unisonic Technologies |
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TDA2005L-J11-A-T Datenblatt(HTML) 7 Page - Unisonic Technologies |
7 / 16 page TDA2005 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 7 of 16 www.unisonic.com.tw QW-R107-035,D BRIDGE AMPLIFIER DESIGN The following consideraions can be useful when designing a bridge amplifier. PARAMETER SINGLE ENDED BRIDGE VOUT max Peak Output Voltage (before clipping) (Vs-2VCE sat) 1 2 Vs-2VCE sat IOUT max Peak Output Current (before clipping) Vs-2VCE sat 1 2 RL Vs-2VCE sat RL POUT max RMS Output Power (before clipping) (Vs-2VCE sat)2 2RL 4 1 (Vs-2VCE sat)2 2RL Where: VCE sat=output transistors saturation voltage VS=allowable supply voltage RL=load impedance Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In order words, with the same RL the bridge configuration can deliver an output power that is four times the output power of a single ended amplifier, while, with the same max output current the bridge configuration can deliver an output power that is twice the output power of a single ended amplifier. Core must be taken when selecting Vs and RL in order to avoid an output peak current above the absolute maximum rating. From the expression for Io max, assuming Vs=14.4V and VCE sat=2V, the minimum load that can be driven by UTC TDA2005 in bridge configuration is: The voltage gain of the bridge configuration is given by (see Figure 3): Gv= V0 V1 =1+ R1 R2× R4 R2 + R4 R3 R4 + For sufficiently high gains (40 ~ 50dB) it is possible to put R2=R4 and R3=2R1, simplifing the formula in: Gv=4 R1 R2 GV (dB) R1(Ω) R2=R4(Ω) R3(Ω) 40 1000 39 2000 50 1000 12 2000 Bridge Configuration |
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