TSM101ACD

Overview

The TSM101ACD 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, two ORed operational amplifiers, and a current source. The device compares DC output voltage and current levels against an internal reference to provide feedback via an optocoupler to the primary-side PWM controller. It features a 1.24 V reference with 1% precision, a 10 mA output current capability, and a built-in current generator with enable/disable functionality. The operational amplifiers offer a 1 MHz gain bandwidth product. It operates within a supply voltage range of 4.5 V to 32 V and supports SO-8 surface mount packaging.

Feature Summary

• Integrates a high-stability series band gap voltage reference with 1% precision and 10 mA output current capability
• Includes two operational amplifiers with ORed outputs and a 1 MHz gain bandwidth product for precise signal processing
• Features a built-in current generator with enable/disable function to modify current limitation levels by offsetting sensing resistor information

Applications

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

Procurement Notes

Verify the specific suffix 'CD' corresponds to the SO-8 tube package configuration as documented in official STMicroelectronics datasheets. Confirm that the industrial temperature grade (-20°C to +80°C) meets the thermal requirements of the target application environment. Ensure compatibility with the 4.5 V to 32 V supply voltage range during system design validation.

Selection Notes

Select the TSM101ACD when designing secondary-side regulation for flyback topologies requiring integrated voltage and current monitoring. The component is suitable for applications needing a stable 1.24 V reference and dual op-amps for error amplification. Consider the SO-8 package constraints and the 1 MHz bandwidth limitations when determining maximum switching frequencies and loop stability requirements.

Part Context

The TSM101ACD belongs to the TSM101 family of voltage and current controllers manufactured by STMicroelectronics. This series is specifically engineered for secondary side management in switch-mode power supplies. The device simplifies circuit design by combining reference, amplification, and current generation functions into a single integrated circuit, reducing component count compared to discrete solutions.

Replacement Considerations

Consult official STMicroelectronics documentation for verified substitute part numbers within the TSM101 family or equivalent functional replacements. Verify pinout compatibility and electrical parameter alignment before substituting.