Xinluda Information Technology Co., Ltd Electronic Parts
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The XL3844 from Xinluda is a fixed-frequency, current-mode PWM (pulse-width modulation) controller designed for off-line and DC-to-DC switching power supply applications. It belongs to the well-established 384x controller family and is a functional equivalent of the industry-standard UC3844, allowing it to serve as a cost-effective alternative in existing designs. The XL3844 integrates a trimmed oscillator, a temperature-compensated reference with under-voltage lockout, a high-gain error amplifier, a current-sensing comparator, and a high-current totem-pole output stage capable of directly driving a power MOSFET.
The XL3844 is a hard-to-find part with little to no authorized-distributor stock through mainstream channels. As an independent distributor specializing in power-management ICs and optocouplers, Pacific Component Xchange helps engineers and buyers secure obsolete, allocated, and hard-to-source components like the XL3844 with confidence. Our team focuses on authenticity and quality verification, supported by global shipping and responsive RFQ handling.
Need the XL3844 or a qualified equivalent? Request a quote (RFQ) from Pacific Component Xchange today and our sourcing specialists will respond with current availability, lead time, and pricing.
The XL3844 is a fixed-frequency, current-mode PWM controller IC from Xinluda. It belongs to the standard 384x controller family and is a functional equivalent of the industry-standard UC3844, used in off-line and DC-DC switching power supplies.
The XL3844 is a functional equivalent of the standard UC3844 device. In most designs it can serve as a cost-effective alternative, but engineers should always verify electrical parameters against the official datasheet for their specific application before substituting.
Both share 16 V / 10 V UVLO thresholds suited for off-line operation. The key difference is the maximum duty cycle: the 3842 variant can approach 100%, while the 3844 variant is limited to under 50% by an internal toggle (divide-by-two) flip-flop, making it suitable for forward and flyback topologies that require duty-cycle limiting.
Xinluda lists the XL3844 in a surface-mount SOP-8 package, consistent with the standard 384x family footprint. If you require a different package or an equivalent part, Pacific Component Xchange can advise on alternatives.
Yes. The XL3844 has little to no authorized-distributor availability through mainstream channels, which is why Pacific Component Xchange offers it on a Request-For-Quote (RFQ) basis as an independent sourcing specialist.
Submit a Request for Quote (RFQ) to Pacific Component Xchange. Our sourcing team will respond with current availability, lead time, and pricing, and can suggest qualified equivalents if needed.
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