Bridge-Tied Load (BTL) class-H high efficiency power amplifier in a 17 lead DIL-bent-SIL plastic power package. Its essence is that to a certain value output (approx. 20 watts) amplifier operates in the mode B. If the output power increases further, included a clever scheme to increase the voltage output stage and thus enables the amplifier to swing to a maximum power of 70 watts.
Key features :
| Supply voltage |
: 14.4V |
| Current consumption in silent mode |
: 110mA |
| Input resistance |
: 150Ohm |
| Rated output power (CG = 0.5%) |
: 55W |
| Maximum power output (CG = 10%) |
: 70W |
| Frequency |
: 20 … 20000V |
This chip is recommended for use in the entry-level subwoofer in your car. And the scheme presented is optimized for this application. Although, of course, no one bothers to play with it a full signal.
Parts List :
R1,R2,R3 : 10K
R4 : 1K
C1,C2 : 0,22uF
C3 : 10uF/16V
C4, C5 : 10000uF/25v
C6 : 0,1uF
C7 : 4700uF/25V
VT1 : KT3107
HL1 : any
DA1 : TDA1562
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