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NCP1203 equivalent ic

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Gaber Mohamed Boraey

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Hello everyone

That’s a pwm controller ic in a smps board, used for fire alarm panel

Attached photos

The mosfet and the pwm ic is burned “ shorter” , and the ic not available in Local market, NCP1203 , is there any equivalent ic for this?, or I can use power module instead of mosfet and ic?

Here the power module I mean

CA888 (CA-888) Super LCD / LED Power Supply Board Universal Module : Buy Online Electronic Components Shop, Price in India : electroncomponents.com

LCD power board damage a large proportion. One of the power to drive the chip, high-power power switch, sampling resistor damage is the most common, because of these component models, variety, often because there is no same spare parts, and can not be rep
www.electroncomponents.com www.electroncomponents.com

Mainly it’s for TVs power supply, so how you think to use here?,

I would prefer equivalency ic, how you think?

Regards
 

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  • 69B19C1E-C11B-45A6-910D-324C4478E227.jpeg
    69B19C1E-C11B-45A6-910D-324C4478E227.jpeg
    1.3 MB · Views: 18
  • B3D45337-631F-4125-AF81-3B29DE630600.jpeg
    B3D45337-631F-4125-AF81-3B29DE630600.jpeg
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It's a common SMPS controller function (current mode flyback) but with special features (built-in oscillator without external RC circuit). Unlikely to find a drop-in replacement. Industry standard controllers like UC3842 can be probably used with additional components and swapped pinout, not well suited for repair.

Also there's a certain risk that more components than only controller and switcher FET are damaged.
 
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