TEA1731LTS/1H

Overview

The TEA1731LTS/1H is a low-cost switched mode power supply controller IC from the TEA173X series, designed for flyback topologies. It operates in peak current and frequency control mode with integrated slope compensation for continuous conduction mode. The device features frequency jitter to reduce electromagnetic interference and implements dynamic frequency reduction at medium and low output power levels to maintain high efficiency across the total load range. It includes internal overpower protection and accepts an overpower situation for a limited time.

Feature Summary

• Integrated overpower protection with internal time-out capability
• Frequency jitter implementation to reduce electromagnetic interference
• Dynamic frequency reduction at low power levels to maintain high efficiency
• Low supply current during start-up and normal operation

Applications

• Flyback topology power supplies
• Low cost SMPS applications
• Power requirements up to 75 W

Procurement Notes

Verify the specific suffix '1H' against official NXP documentation to confirm pinout compatibility and electrical characteristics relative to other variants like '1Z'. Ensure the component meets RoHS compliance requirements for the target market. Confirm availability through authorized distributors as stock levels fluctuate. Validate that the TSOP-6 package matches the PCB footprint design constraints.

Selection Notes

Select this controller for designs requiring a balance between cost and efficiency in flyback converters. It is suitable for applications where reducing electromagnetic interference is critical due to its jitter feature. Consider this part when designing for power levels up to 75 W with minimal external components. Evaluate the need for external overtemperature protection implementation based on system thermal constraints.

Part Context

This component belongs to the TEA173X GreenChip family of SMPS control ICs. These devices are optimized for high efficiency and reliability in consumer and industrial power adapters. The family focuses on simplifying design by minimizing external component count while providing advanced control modes such as peak current and frequency control.

FAQ

How does the TEA1731LTS/1H handle overload conditions?

The IC features internal overpower protection (OPP) with an internal time-out. It can accept an overpower situation for a limited amount of time before triggering protection.

What mechanism is used to reduce electromagnetic interference?

The controller implements frequency jitter to spread the switching noise spectrum and reduce electromagnetic interference emissions.