Keeping Power Supplies Alive with Obsolete SG1626Y Controllers

The Challenge: A Legacy PWM Controller, Now Discontinued

An OEM relied on the SG1626Y: a pulse-width modulation (PWM) controller IC in the power supply units of one of its long-running industrial product lines. Despite being discontinued, this part remained a key component in its system architecture.

But with no availability through authorized channels and no drop-in replacements available, the OEM faced an unpleasant choice: stop production or invest in costly redesigns and revalidation.

Why This Component Was Critical

The SG1626Y provided:

• Accurate voltage and current regulation for switching power supplies

• Integrated undervoltage lockout and soft-start features

• Proven performance in high-efficiency industrial power systems

Rewriting firmware and requalifying a replacement PWM IC wasn’t feasible within the customer’s tight timeline. They needed the original part, fast.

Maketronics’ Role: Rapid Sourcing with Quality Assurance

The Maketronics team activated its global database of vetted suppliers across Asia, Europe, and North America. Within a short span:

1. We located a traceable stock of SG1626Y in verified condition

2. Performed visual inspection and external lab verification

3. Tested the parts at a third-party certified lab for External Visual Inspection (EVI)

4. Shared a QC report with the customer, giving peace of mind about authenticity

5. Coordinated prompt international shipment to the customer’s facility

Results Delivered

1. Sourced a discontinued PWM controller despite no availability in franchise channels

2. Delivered in time to prevent production stoppage

3. Saved the customer from a costly redesign cycle

4. Maintained compatibility with legacy system architecture

5. Provided test-backed confidence in part authenticity

When Obsolete Power Components Stall You. We Step In

At Maketronics, we specialize in finding discontinued and hard-to-source components essential to legacy industrial systems. From ICs to embedded boards, if it’s out of stock, we’ll track it down.

Need help sourcing an obsolete part? We’re ready.

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