TSM101ID

Overview

The TSM101ID is a voltage and current controller integrated circuit manufactured by STMicroelectronics. It incorporates a high stability series band gap voltage reference, two ORed operational amplifiers, and a current source. The device compares the DC voltage and current level at the output of a switching power supply to an internal reference. It provides feedback through an optocoupler to the PWM controller IC in the primary side. The controlled current generator modifies the level of current limitation by offsetting information from the current sensing resistor.

Feature Summary

• Integrates a 1.24 V series voltage reference with 1% precision and 10 mA output current capability
• Features two operational amplifiers with ORed outputs and a 1 MHz gain bandwidth product
• Includes a built-in current generator with enable and disable functions for flexible control

Applications

• Switching mode power supplies requiring constant voltage and constant current modes
• Feedback circuits connecting secondary side regulation to primary side PWM controllers
• Current limiting applications utilizing external current sensing resistors

Procurement Notes

Verify the specific suffix 'ID' against the manufacturer's official datasheet to confirm the package type and temperature grade. Ensure the ordering part number matches the exact component required for the design. Confirm availability and lead times directly with authorized distributors or the manufacturer. Check for any recent product change notices that may affect specifications or packaging.

Selection Notes

Select this component for designs requiring precise voltage and current regulation in isolated power supplies. The integrated ORed op-amp configuration simplifies compensation networks. Verify that the 4.5 V to 32 V supply voltage range aligns with the system requirements. Consider the SO8 package option if space constraints are present compared to DIP or TSSOP variants.

Part Context

The TSM101 belongs to a family of specialized analog circuits designed for power management applications. Variants such as TSM101CDT and TSM101CN exist within the same product line, offering different package styles or reel options. This specific model represents a standard industrial grade solution for offline AC/DC converters.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin replacements. Alternative models within the TSM101 family may offer different packaging but identical electrical characteristics. Cross-reference with other STMicroelectronics voltage and current controllers if specific package types are unavailable.