TL594IPW

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TL594 is a pulse width modulation (PWM) control integrated circuit (IC). This control IC is used to regulate one or more switched-mode power supplies or DC-DC voltage converters. It is used to variably control the output voltage of the converters depending on the demands of the application. TL594IPW is among the latest version of PWM control IC manufactured by Texas Instruments Inc. This IC is designed for an accurate control of the output voltage, load current and temperature of the converter. Therefore, it is an ideal choice of application in high power switching regulators, motor controllers, isolated AC to DC and DC to DC converters.

TL594IPW Application Field And Working Principle

TL594IPW find huge applications in a varied range of consumer electronics. Some of the consumer electronics where its applications can be found include ultra-reliability products such as server racks, industrial devices such as vacuum cleaners, washing machines and refrigerators, and other consumer products such as smart switches, solenoids, digital cameras and speakers. The core working of the TL594IPW is based on Pulse Width Modulation (PWM). The PWM is a digital process wherein the output voltage is regulated by varying the amount of time the load is switched in a fixed on and off cycles. This PWM process transforms the digital signals into an output voltage. The PWM output voltage is then regulated using the TL594IC and other gate driver control logic. This PWM control is used to regulate the output voltage of the parameters such as current, voltage and temperature.

Features of TL594IPW

TL594IPW has a number of features which provide the user a flexibility and ease of use. Some of its salient features are:

• Accepts a 3V to 36V input range
• High efficiency and precision current control
• High accuracy voltage control
• Up to ± 5% tolerance on output voltage
• Thermal protection
• Under voltage lockout
• Soft start capability
• Output over and under voltage protection
• Low power consumption
• Highly versatile for a wide range of applications
• Pinout and package compatible with TI TL594 family devices

Internals of TL594IPW

The internal architecture of the TL594IPW consists of several functional blocks, such as the bias generator, oscillator, regulation logic, MOSFET gate driver, thermal protection and protection circuitry. The bias generator receives the main control voltage, VCC, and generates the precise internal voltage levels necessary for the proper operation of the remaining circuitry. This is then followed by the oscillator which provides the pulse width modulation (PWM) signals to the regulation logic. The regulation logic block provides the regulation gains and setpoint voltages by manipulating the PWM signals based on the feedback signals received from the output. The MOSFET gate driver block provides the logic level to drive the external MOSFETs located on the converter’s output stage. Finally, the protection circuitry block provides additional protection against over current, over temperature, under and over voltage.

Conclusion

TL594IPW is an advanced PWM IC designed to regulate one or more switched-mode power supplies or DC-DC voltage converters. It provides precise control of the output current, voltage and temperature. This advanced IC is used in a wide range of consumer electronics, including ultra-reliability products such as server racks and industrial devices such as washing machines and refrigerators. The various features of the IC, such as the high efficiency and precision current control, flexibility, accurate voltage control and others, make TL594IPW an ideal choice of application in high power switching regulators, motor controllers, isolated AC to DC and DC to DC converters.

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