TSM1013AIDT

Overview

The TSM1013AIDT is a highly integrated constant voltage and constant current controller designed for switch-mode power supply applications. It integrates one fixed 2.5V voltage reference with two operational amplifiers to provide precise control in battery chargers and adapters. The device operates within a DC supply voltage range of 4.5V to 28V and supports an operating temperature range of 0°C to 105°C. It features a current sink output stage, easy compensation capabilities, and low external component count requirements.

Feature Summary

• Integrates a fixed 2.5V voltage reference and two operational amplifiers for combined voltage and current regulation
• Features a current sink output stage that enables ORing functionality for simultaneous control loops
• Provides easy compensation through accessible output and negative input pins for both amplifiers

Applications

• Battery Chargers
• Adapters

Procurement Notes

Verify the specific suffix 'DT' indicates tape and reel packaging rather than tube. Confirm the 'A' designation corresponds to the 0.5% voltage precision variant as opposed to the standard 1% tolerance. Ensure the application environment remains within the specified 0°C to 105°C operating temperature range.

Selection Notes

Select this component when designing secondary side control for flyback converters requiring tight CV/CC regulation. The internal Zener clamp protects against supply voltages exceeding 28V. Consider primary PWM module coordination for start-up conditions where the IC may lack sufficient supply voltage.

Part Context

This part belongs to the TSM1013 family of power supply support circuits manufactured by STMicroelectronics. It is categorized under analog mixed-signal ICs specifically designed for power management tasks involving battery charging and adapter applications.

Replacement Considerations

TSM1013I

FAQ

How does the TSM1013 handle simultaneous voltage and current regulation?

The device uses two transconductance operational amplifiers with common collector outputs. This configuration creates an ORing function, ensuring the optocoupler activates whenever either the voltage or current limit is reached.

What is the purpose of the internal Zener clamp on the Vcc pin?

The internal Zener clamp limits the Vcc voltage to a maximum of 28V, protecting the IC from overvoltage conditions that may occur during startup or short-circuit scenarios.