TSM101AIDT

Overview

The TSM101AIDT is a voltage and current controller IC from STMicroelectronics, designed for secondary side control in switching power supplies. It integrates a high-stability series band gap voltage reference with 1% precision and 10 mA output current capability. The device includes two operational amplifiers featuring ORed outputs and a 1 MHz gain bandwidth product, alongside a controlled current source. It operates within a supply voltage range of 4.5 V to 32 V and supports surface mount installation in an 8-SOIC package.

Feature Summary

• Integrates a 1.24 V series voltage reference with 1% precision and 10 mA output current
• Contains two operational amplifiers with ORed outputs and 1 MHz gain bandwidth product
• Includes a built-in current generator with enable/disable function for current limitation adjustment

Applications

• Secondary side feedback control in switching power supplies
• Voltage and current regulation via optocoupler feedback to primary PWM controllers
• Current sensing offset modification using internal current sources

Procurement Notes

Verify the specific suffix 'DT' corresponds to the 8-SOIC surface-mount package configuration when sourcing. Confirm that the component meets RoHS3 compliance standards as indicated in official documentation. Ensure the operating temperature range aligns with system requirements, specifically noting the -40°C to 105°C ambient temperature specification. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for applications requiring integrated voltage and current monitoring on the secondary side of isolated power converters. The dual op-amp architecture allows for simultaneous regulation loops without additional discrete components. Consider the 1 MHz bandwidth for higher frequency control loop stability. Evaluate the 4.5 V minimum supply requirement against the auxiliary winding voltage availability in the target design.

Part Context

The TSM101AIDT belongs to the TSM101 family of voltage and current controllers manufactured by STMicroelectronics. This series is engineered for flyback and forward converter topologies where precise secondary-side regulation is critical. The integration of the band gap reference and amplifiers reduces bill-of-materials complexity compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers include TSM101ACDT.