200W RMS Stereo Amplifier using STK4231II IC + PCB

PCB 200W RMS Stereo Power Amplifier IC STK4231II

This audio amplifier circuit is a HI-FI two-channel 100w OCL High Power Stereo Audio Amplifier based on the STK4231II IC.

STK4231 is a Thick film hybrid IC two-channel 100W min AF Power Amp, manufactured by SANYO ELECTRIC CO. LTD JAPAN. The STK4221II IC is a dual high power amplifier chip, preferably suited for compact high power audio applications, it provides 2 channel high power best quality audio output of 100W RMS at both channel at 8Ω speaker.

Features

The STK4201II series are pin-compatible in the range output of 60W to 100W, are 22 pin SIP (Single Inline Package) IC with a special case designing for operation at more heat dissipation to generally reduce external heat sink.

But use a heat sink for protection. This IC is generally used in the home microsystem, car audio. The real IC image is shown below in Figure 2.

Fig. 2 – Pinout of IC STK4231II

Figure 3 below, show the schematic circuit diagram 100W + 100W RMS Stereo Power Audio Amplifier to be followed, with the arrangement of the components and their configurations.

Schematic diagram of 200W Stereo power amplifier IC STK4231II

Fig. 3 – Schematic 200W Stereo power amplifier IC STK4231II

Components List

U1…………………………… STK4231II – Audio Amplifier Integrated Circuit
R1, R2, R8 ………………. 1K ohms – 1/8 W – brown, black, red
R3, R4, R12, R16 …….. 56K ohms – 1/8 W – green, blue, orange
R5, R6 …………………….. 1K ohms – 1W – brown, black, red
R7 …………………………… 100 ohms – 1/8 W – brown, brown, black
R9, R14 …………………… 4.7K ohms – 1/8 W – yellow, violet, red
R10, R18 …………………. 4.7K ohms – 1W – yellow, violet, red
R11, R15 …………………. 0.22 ohms – 5W – red, red, silver, gold , black
R13, R17 …………………. 560 ohms – 1/8 W – green, blue, brown
R19, R20, R21, R22 ….. 4.7 ohms – 18W – yellow, violet, gold
R10 …………………………. 4.7K ohms – 1W – yellow, violet, red
C1, C2 ………………………… 470pF – Polyester or Ceramic Capacitor
C3, C4 ………………………… 2.2uF – Electrolytic Capacitor
C5, C6, C7, C8, 9, C10 …. 10uF – 63V – Electrolytic Capacitor
C11, C12 …………………….. 47 uF – 63V – Electrolytic Capacitor
C13, C14 ……………………. 100 nF – Polyester or Ceramic Capacitor
L1, L2 ………………………… 3uH inductor
J1, J2 ………………………….. Kre Block Terminal Terminal 3-Way Triple Connector
J1, J2 ………………………….. Kre Block Terminal Terminal 2-Way Double Connector
Others ………………………… Printed Circuit Board, tin, wire, etc.

Specified Transformer Power Supply

The power transformer must have a Dual Supply Capacity and 5 Amperes minimal current, this circuit is powered by a constant-voltage Dual Power Supply (+50V, 0V, -50V) CC, for the correct operation.

The power supply is the same as the one in Figure 4, available on the FVML website which is our partner,the difference is that the transformer is 35V AC, which after filtering will be approximately 50V DC.

Clicking in image below, you will be directed to the FVML website, which even has the calculations to understand it better and the printed circuit board files with GERBER files to download.

Fig. 4 Schematic Power Supply, click to download free the Gerber files

We are offering to download the link with the printed circuit board printing files, they are; Gerber, PDF layout, PNG, all the files with a direct link to Mega.

Direct link to download

Click in the link below to download the Files: PCB Layout, PDF, GERBER

Click Here!!!

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