The PCM is of a power supply unit for a speaker and it has this PWM IC (OB2362). I am not able to find an exact replacement to that chip but found a close match (not sure though): the OB2263. It has the same pin-out. Can I replace the 2362 with the 2263?
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1\$\begingroup\$ Did you compare both datasheets? Where and what are the differences? \$\endgroup\$– UweMay 14 at 11:24
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\$\begingroup\$ the only major difference i came across was that the the 2362 has a fixed frequency mode of 65khz and the 2236 has a variable frequency mode from 60-100khz. Apart from that the absolute maximum ratings of both the ICs matched, the 2362 is rated at 12-26v whereas the 2236 is 10-30v. I can provide u links to both datasheet. Maybe u can take a look and see for yourself. I am still trying to understand all the technical characterestics given in the datasheet cz all of them don't exactly match. \$\endgroup\$– Shubhojit DasMay 14 at 12:59
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1\$\begingroup\$ Do they have the same pinout? If the 2362 you're replacing has a fixed frequency, while the 2263 you want to use has a variable frequency, how is that variable frequency set? \$\endgroup\$– brhansMay 14 at 13:10
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\$\begingroup\$ See page 8 of the OB2263 datasheet for the diagram Fosc(KHz) vs. RI(Kohm), a frequency of 65 kHz is acheived with RI = 100 kOhm. See page 3 Internal Oscillator frequency setting pin. A resistor connected between RI and GND sets the PWM frequency. RI is connected between Pin 4 RI and Pin 8 GND. A resistor with two wires may be soldered directly to the PCB. \$\endgroup\$– UweMay 14 at 16:51
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