This automobile stereo amplifier project is a class AB audio energy amplifier utilizing the Hitachi HA13118 module. It no longer handiest can be used in car utility but additionally in any transportable or residence amplifier process. It is inconspicuous to construct & has a most of outdoor phases. The module has a high power output from a low voltage supply utilizing the bridge tied load system, & a excessive achieve of 55dB.
This project will probably be useful in softwares where the input sign is a low stage, with out requiring using a separate pre-amplifier. This IC module has a inbuilt surge safety circuit, thermal shutdown circuit, ground fault protection circuit & power provide fault protection circuit making it reliable.
This project will probably be useful in softwares where the input sign is a low stage, with out requiring using a separate pre-amplifier. This IC module has a inbuilt surge safety circuit, thermal shutdown circuit, ground fault protection circuit & power provide fault protection circuit making it reliable.
The Specifications of this undertaking
D.C. Input : eight – 18V at 1-2 A
Power output : 18W maximum, 4 ohm load, 18V DC supply
S/N ratio : > 70 dB
THD : < 0.2% @ 1W
Freq. Response : ~ 30 Hz to 30 okHz, –3 dB
Input stage : < 25 mV, for full output (G > 50dB)
Input Impedance : ~ 30 ok ohm
D.C. Input : eight – 18V at 1-2 A
Power output : 18W maximum, 4 ohm load, 18V DC supply
S/N ratio : > 70 dB
THD : < 0.2% @ 1W
Freq. Response : ~ 30 Hz to 30 okHz, –3 dB
Input stage : < 25 mV, for full output (G > 50dB)
Input Impedance : ~ 30 ok ohm
The provide voltage vital for this challenge is eight -18V DC, as a minimum one to two Amps. Maximum output power will handiest be bought with a power supply of 18V at larger than two A, using a 4 ohm speaker. The power supply needs to be neatly filtered to scale back mains hum, a regulated provide will scale back noise even additional. Additional filtering is now not sensible if working from a battery supply.
Circuit Diagram Description
Most of the circuitry is contained inside the amplifier module. C10 is the enter coupling capacitor and blocks DC from the input. C11 bypasses any RF which could additionally be current at the input. C1 & C2 provide an AC floor for the inverting inputs of the IC. R1/C7 and R2/C8 provide a excessive frequency load for stability with difficult speakers. C five & C six present bootstrap feedback for the IC. C9 & C12 present power provide filtering.
Most of the circuitry is contained inside the amplifier module. C10 is the enter coupling capacitor and blocks DC from the input. C11 bypasses any RF which could additionally be current at the input. C1 & C2 provide an AC floor for the inverting inputs of the IC. R1/C7 and R2/C8 provide a excessive frequency load for stability with difficult speakers. C five & C six present bootstrap feedback for the IC. C9 & C12 present power provide filtering.
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An externally mounted logarithmic potentiometer of between 10k ohm and 50k ohm, is used relying on the specified input impedance. The impedance should be keep as excessive as feasible for a guitar amp, except utilizing a separate pre-amp. Make sure-that the heat sink is hooked up to the module.
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