TL5001CDG4

TL5001CDG4 Application Field and Working Principle

Introduction to TL5001CDG4

TL5001CDG4 is a current mode switch controller which is made by Texas Instruments. It operates in voltage-mode topology and its working frequency range goes up to 150 kHz. The PWM controller has an optimized on- time control and supports pulse-by-pulse current limit. It has reverse protection protection, UVLO, thermal shutdown and cycle-by-cycle current limit. It is an ideal choice for DC/DC converter solutions.

Application Field

TL5001CDG4 is a DC/DC switch controller for adjustable and non-adjustable power supplies. The TL5001CDG4 is suitable for many applications including desktop computer power supply, peripheral power, auxiliary power, and PCMCIA applications. The frequency adjustable output voltage current mode PWM controllers provide constant frequency and allow the output voltage to be externally adjusted. Due to its wide range of voltage adjustments and its high accuracy, relatively high precision applications can be realized. The pins of the TL5001CDG4 are dual-inline packaging compatible and are directly suited for use in a surface mount assembly process.

Working Principle

The working principle of the TL5001CDG4 is based on current mode PWM control that is integrated in a fast standard surface MOSFET. This PWM control implements an adaptive slope compensation scheme to ensure a constant switching frequency and good load response characteristics. The output voltage is adjusted externally and the system limits the output current to prevent any overload situation. The TL5001CDG4 also supports external loop compensation for higher stability and a pulse by pulse current limit for fast over load protection.

It has an output voltage sense comparator to precisely regulate the output voltage. This output voltage regulator senses the actual output voltage and uses an external reference voltage to compare and regulate the output voltage. The external feedback resistors and output sense resistor values are optimized to provide an accurate output voltage across a wide range of operating conditions, with a minimum number of external components. In addition, this device includes programmable cycle-by-cycle current limit, as well as a maximum duty cycle control function to enhance system transient performance.

Conclusion

The TL5001CDG4 is a high performance switch controller that offers an adjustable and non-adjustable voltage output PWM controllers. Operation is optimized for low parts count, small size, and ease of use. The TL5001CDG4 is capable of providing a regulated output voltage and a stable current limit with a minimum number of external components. This PWM controller provides high precision, low ripple output voltage, which makes it suitable for almost any application. With its fast switching operation, accurate output voltage sensing, and wide range of operating conditions, it is an ideal choice for your DC/DC power conversion solutions.