TSM101CDT

Overview

The TSM101CDT is a switching controller IC from STMicroelectronics, designed for secondary side control in switch-mode power supplies. It integrates a high-stability series band gap voltage reference providing 1.24 V with 1% precision and 10 mA output current. The device includes two ORed operational amplifiers with a 1 MHz gain-bandwidth product and a built-in current generator with enable/disable functionality. It operates within a supply voltage range of 4.5 V to 32 V and supports an output voltage range of 1.24 V to 32 V. The component is housed in an SOIC-8 package and functions by comparing DC voltage and current levels to provide feedback via an optocoupler.

Feature Summary

• Integrates a high-stability series band gap voltage reference with precise output capability
• Features two operational amplifiers with ORed outputs for flexible signal processing
• Includes a controlled current generator to modify current limitation levels

Applications

• Secondary side control for flyback switching power supplies
• Voltage and current regulation in isolated power converters
• Feedback loop implementation via optocouplers to primary PWM controllers

Procurement Notes

Verify the specific suffix 'CDT' indicates tape and reel packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to integration. Ensure the operating temperature range aligns with system requirements. Cross-reference the manufacturer part number against authorized channels to avoid counterfeit components. Validate pinout compatibility with existing PCB layouts during the design phase.

Selection Notes

Select this component for applications requiring integrated voltage and current monitoring on the secondary side. The dual op-amp configuration allows for simultaneous regulation loops without additional external components. Consider the SOIC-8 package constraints for thermal management and board space. Verify that the 1.24 V reference precision meets the overall system accuracy requirements. Ensure the supply voltage range matches the auxiliary winding or bias supply characteristics of the power stage.

Part Context

The TSM101CDT belongs to the TSM101 family of voltage and current controllers manufactured by STMicroelectronics. This series is specifically engineered for secondary side regulation in isolated power conversion topologies. The device consolidates reference, amplification, and current generation functions into a single integrated circuit, simplifying the design of closed-loop power supplies.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.