L5991AD13TR

DC DC Switching Controllers Overview

The L5991AD13TR is a primary switching controller from STMicroelectronics, designed for off-line and DC-DC power supply applications using fixed frequency current mode control. It supports Boost and Flyback topologies with a single output. The device operates within a supply voltage range of 12 V to 20 V and features a switching frequency up to 1 MHz. It provides an output current capability of 1 A and delivers a reference voltage of 5.075 V. The maximum duty cycle is programmable, reaching up to 100%. The component is housed in a SOIC-16 package and is rated for operation between -40°C and +150°C.

DC DC Switching Controllers Feature Summary

• Programmable soft start and IN/OUT synchronization capabilities
• Standby function for oscillator frequency reduction during light load conditions
• Internal 100ns leading edge blanking on current sense input
• Pulse-by-pulse current limit with overcurrent protection and restart delay

DC DC Switching Controllers Applications

• Offline AC-DC power supplies
• DC-DC converter designs
• Flyback topology power management systems
• Equipment requiring energy-saving standby modes

DC DC Switching Controllers Procurement Notes

Verify the specific suffix '13TR' corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the SOIC-16 package dimensions align with the target PCB footprint. Ensure the operating temperature range meets the environmental requirements of the final application. Cross-reference the manufacturer part number with official distribution channels to guarantee authenticity and traceability.

DC DC Switching Controllers Selection Notes

Select this controller when implementing current mode PWM architectures requiring precise duty cycle control and synchronization. It is suitable for designs needing high efficiency under light loads due to its standby frequency reduction feature. Consider the 1 A output drive strength for direct MOSFET driving. Evaluate the thermal performance within the specified -40°C to +150°C range for robust industrial or commercial deployment.

DC DC Switching Controllers Part Context

This component belongs to the L5991 series of switching controllers developed by STMicroelectronics. The series utilizes BCD60II technology to integrate advanced power management features into a compact form factor. The L5991 family is engineered for high-performance power conversion, offering flexibility through programmable parameters while maintaining stability via internal protection mechanisms like UVLO and latch-off logic.

DC DC Switching Controllers Replacement Considerations

The L5991AD variant serves as a non-trailing-zero version of this part, differing primarily in packaging (tube vs. reel). Verify pin compatibility and electrical specifications before substituting with other L5991 series members. No alternative part numbers are confirmed as direct functional substitutes in public documentation.