What is the Xinluda XL2844?

The XL2844 is a high-performance current-mode PWM controller from Xinluda, supplied in an SOP-8 package. It belongs to the well-known 284x controller family and follows the UC2844 architecture used in off-line and DC-DC switch-mode power supplies.

Is the XL2844 compatible with the UC2844?

The XL2844 is built around the standard UC2844 current-mode PWM architecture and shares the characteristic 16 V / 10 V UVLO thresholds and the under-50% maximum output duty cycle of the 2844 variant. Designers often use it as a cost-effective alternative in 2844-based designs, but you should always verify pinout and parameters against your specific circuit and the manufacturer datasheet.

What is the maximum duty cycle of the XL2844?

As a 2844-variant controller, the XL2844 limits the maximum output duty cycle to under 50% via an internal toggle flip-flop that runs the output at half the oscillator frequency. This distinguishes it from 2842/2843-type parts, which can approach 100% duty cycle. Always confirm against the manufacturer datasheet for your design.

What package does the XL2844 come in?

Pacific Component Xchange lists the XL2844 in the SOP-8 surface-mount package, consistent with the Xinluda 284x PWM controller series.

What are the UVLO thresholds of the XL2844?

The XL2844 uses the 2844-variant undervoltage lockout thresholds of approximately 16 V turn-on and 10 V turn-off, which make it well suited to bootstrap-started off-line flyback and forward converters.

Why is the XL2844 only available by request for quote?

The XL2844 is a regional / house-brand part with limited authorized-distributor availability. Pacific Component Xchange sources it on a request-for-quote basis so we can confirm verified stock, current pricing, and lead time for each order.

Can Pacific Component Xchange supply the XL2844 in production quantities?

Yes. As an independent distributor focused on hard-to-find power-management ICs, Pacific Component Xchange can source the XL2844 in prototype through production volumes. Submit an RFQ and our team will locate stock and provide a quote with lead time and global shipping options.

XL2844 – PWM Controller – Xinluda

The Xinluda XL2844 is a high-performance current-mode PWM controller in an SOP-8 package, pin-compatible with the industry-standard UC2844 family. Available for RFQ from Pacific Component Xchange.

Brand:Xinluda

SKU: XL2844 Categories: Electronic Parts, RFQ

Please contact us or add to quote for current pricing and availability.

The Xinluda XL2844 is a high-performance fixed-frequency, current-mode PWM (pulse-width modulation) controller designed for off-line and DC-to-DC switch-mode power supplies. It belongs to the widely adopted 284x/384x controller family and follows the well-known UC2844 architecture, making it a practical, cost-effective drop-in option for power-supply designs that rely on a current-mode control loop with cycle-by-cycle current limiting. The XL2844 is supplied in a compact SOP-8 surface-mount package.

As a member of the 2844 group, the XL2844 features the characteristic 16 V turn-on / 10 V turn-off undervoltage lockout (UVLO) thresholds, which make it well suited to bootstrap-started off-line flyback and forward converter topologies. Like other 2844-variant controllers, it incorporates an internal toggle flip-flop that limits the maximum output duty cycle to under 50%, a behavior designers should account for in transformer and timing design. Its current-mode control scheme provides inherent line feed-forward, automatic pulse-by-pulse current limiting, and improved load-transient response compared with simple voltage-mode controllers.

Key Features

Current-mode PWM control with cycle-by-cycle current limiting
Characteristic 2844-variant undervoltage lockout (UVLO): 16 V turn-on / 10 V turn-off thresholds
Maximum oscillator/switching frequency: up to 500 kHz
2844-variant maximum output duty cycle: limited to under 50% by an internal toggle flip-flop
Trimmed internal oscillator for precise frequency control
Latched PWM logic for reliable single-pulse-per-cycle operation
SOP-8 surface-mount package

Applications

Off-line AC-DC flyback and forward switch-mode power supplies
Isolated and non-isolated DC-DC converters
Power adapters and chargers
Auxiliary and standby power supplies
Industrial and consumer SMPS designs
LED driver power stages

Why Source XL2844 from Pacific Component Xchange

The XL2844 is a regional / house-brand PWM controller with limited authorized-distributor coverage, which can make it difficult to source through mainstream channels. Pacific Component Xchange is an independent distributor specializing in hard-to-find and obsolete power-management ICs. We help engineers and buyers secure 284x-family controllers like the XL2844 when standard distribution is short or unavailable.

Every order is backed by our commitment to authenticity, inspection, and traceability, with global shipping to keep your production lines and field-service inventories running. Because this is a request-for-quote item, pricing and lead time are confirmed per order based on current market supply. Contact Pacific Component Xchange today to request a quote on the XL2844 and let our sourcing team locate verified stock for your build.

Additional Information

Manufacturer	Xinluda
Component Type	Current-Mode PWM Controller
Family	284x / UC2844-type
UVLO Thresholds	16 V on / 10 V off (2844 variant)
Max Oscillator Frequency	Up to 500 kHz
Max Output Duty Cycle	<50% (internal toggle flip-flop, 2844 variant)
Control Method	Current mode
Package	SOP-8
Part Status	Active
Availability	Available