Shenzhen Xinluda Information Technology Co., Ltd. Electronic Parts
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The Xinluda XD494 is a complete pulse-width-modulation (PWM) control circuit integrated on a single monolithic chip, supplied in a through-hole DIP-16 package. Functionally and pin-for-pin compatible with the classic TL494, the XD494 combines two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, an internal 5V precision reference, and two uncommitted output transistors. This integration makes the XD494 a cost-effective core controller for a wide range of switch-mode and AC-DC power supply designs.
The device supports both push-pull and single-ended (common-emitter or emitter-follower) output operation, selectable via the output-control pin. During push-pull operation, the internal pulse-steering logic structurally prevents double-pulse output. The dead-time control comparator includes a fixed offset that provides approximately 5% dead time, and the common-mode input range of the error amplifiers spans -0.3V to (Vcc – 2V).
The Xinluda XD494 is a hard-to-find PWM controller with limited authorized-distributor availability, and stock at mainstream catalog distributors is frequently depleted. Pacific Component Xchange is an independent distributor specializing in scarce and obsolete power-management ICs. We help engineers and buyers secure the XD494 and TL494-family equivalents when standard supply channels come up empty.
Every order is backed by our authenticity and quality-assurance commitment, with inspection and counterfeit-avoidance procedures to protect your build. We offer global shipping and responsive sourcing for both prototype quantities and production runs. Request a quote (RFQ) today for current pricing, lead time, and available stock on the XD494 from Pacific Component Xchange.
The XD494 is a single-chip pulse-width-modulation (PWM) control IC from Xinluda in a DIP-16 package. It integrates two error amplifiers, an adjustable oscillator, a dead-time comparator, a pulse-steering flip-flop, a 5V reference, and two output transistors for switch-mode and AC-DC power supply designs.
Yes. The XD494 is functionally and pin-for-pin compatible with the industry-standard TL494 PWM controller, making it a drop-in alternative in most TL494-based push-pull and single-ended SMPS circuits.
The XD494 operates at a supply voltage up to 40V and supports switching frequencies up to 300 kHz, with an on-chip adjustable oscillator.
The XD494 provides two uncommitted output transistors rated for up to 200 mA (source or sink), configurable for push-pull or single-ended output operation.
The XD494 is supplied in a through-hole DIP-16 package and is RoHS compliant.
The XD494 is a hard-to-find part with limited authorized-distributor availability. Pacific Component Xchange is an independent distributor that specializes in sourcing scarce power-management ICs. Submit an RFQ for current pricing, lead time, and availability.
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