XL3845 – Current-Mode PWM Controller – Xinluda

The XL3845 from Xinluda is a fixed-frequency, current-mode PWM controller in an SOP-8 package, functionally aligned with the industry-standard UC3845 family. It is offered as a request-for-quote (RFQ) item through Pacific Component Xchange.

The XL3845 is a high-performance, fixed-frequency current-mode PWM controller manufactured by Xinluda (Shenzhen Xinluda Information Technology). Belonging to the widely deployed UCx84x / UC3845 controller family, the XL3845 is designed to implement off-line and DC-to-DC fixed-frequency current-mode control schemes with a minimum of external components. It is supplied in a compact SOP-8 surface-mount package (the Xinluda datasheet also documents a DIP-8 option) and provides the load-response and line-regulation advantages of current-mode control over voltage-mode designs.

Key Features

• Current-mode PWM control with cycle-by-cycle current limiting for robust, reliable power-converter regulation
• Integrated undervoltage lockout (UVLO): typical 8.8 V start-up threshold and 8.0 V minimum operating voltage per the Xinluda datasheet
• Low start-up current: typically 60 uA
• High-current push-pull (totem-pole) output with up to 1 A drive capability, suitable for directly driving a power MOSFET gate
• Stable internal reference voltage source with integrated undervoltage lockout
• Maximum operating frequency up to 500 kHz
• Maximum duty cycle limited to 50% (typical 48%), consistent with the UC3844/UC3845 variants of the family
• SOP-8 surface-mount package for space-constrained power designs
• Pin-function compatible with the industry-standard UC3845 / TL3845 controller family for second-source flexibility

Applications

• Off-line AC-DC switch-mode power supplies (SMPS)
• Isolated and non-isolated DC-DC converters
• Flyback and forward converter controllers
• Auxiliary and bias power supplies
• Adapter, charger and industrial power modules
• LED driver and constant-current/constant-voltage power stages

Why Source XL3845 from Pacific Component Xchange

The XL3845 is a specialty Xinluda controller with limited authorized-distributor availability, which makes consistent, verified supply a challenge for production and repair builds. Pacific Component Xchange is an independent distributor focused on hard-to-find and obsolete power-management ICs and optocouplers. We help engineers and procurement teams secure the XL3845 and its UCx84x-family equivalents when standard channels come up short.

Every order is backed by our commitment to authenticity and quality, with inspection and traceability processes designed to protect your bill of materials from counterfeit and substandard parts. We offer global shipping and flexible quantities for prototype through production volumes.

Because the XL3845 is a request-for-quote item, contact Pacific Component Xchange today to request a quote on current availability, lead time, and pricing. Submit your RFQ and our sourcing team will respond promptly with verified stock options.