TPS53624RHAT Integrated Circuits (ICs)

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The TPS53624RHAT is a high voltage DC/DC buck controller that give designers the option for low overall solution size, high performance, and improved transient response. It is effectively used in conditions where a high input voltage is required, such as in automotive and industrial applications. The device provides regulated output voltage with a high frequency PWM control scheme, accurate current sensing, and internal over current limit protection. Manufactured from silicon gate bipolar CMOS process, the TPS53624RHAT offers optimal efficiency and improved load transient performance typically seen in high-end products.

Features

• Wide input voltage range: 4V-40V
• Input voltage Under voltage Lockout (UVLO): 3V
• Output voltage programmable 0.8V-16V
• Few external components required
• Max Output current: 8A
• Max Frequency: 200KHz
• 0.6V Precision voltage reference
• High efficiency current sensing
• Temperature range of -40°C to 125°C

Applications

• AVR microcontroller with reset control
• Process control in automotive and industrial applications
• General Voltage regulation, including two-transistor forward converters and flyback applications
• LED lighting systems
• Power MOSFET and IGBT gate driving applications

Working Principle

The TPS53624RHAT implements a high frequency PWM control scheme and is driven by a fixed frequency oscillator with a minimum on-time of 30ns. During the ON-time, the pulses switch the MOSFETs and the inductor self-generates current. Current measured across the inductor together with a control loop, enable the TPS53624RHAT to provide regulation between input and output voltage. The device will not be able to respond to fast changing loads, which requires external compensation.

The device senses the signal from the power MOSFET output current to switch from low current to high current operating modes. In low mode, the TPS53624RHAT switches the power MOSFET between 0.2V and 1.5V and during high mode, the output current measured is monitored and reacts to the load. This process enables the user to select the operating mode and optimize it based on the application.

The TPS53624RHAT is composed of an internal 0.6V linear voltage reference, enabling it to accurately sense the output voltage and current. The internal voltage reference circuits also provide a thermally compensated reference. In order to protect the device from harmful conditions and to guarantee a safe and reliable operation, the TPS53624RHAT has an extensive set of protection features, including an internal over current protection (OCP), which is adjustable through external resistor, and an over temperature protection (OTP).

Conclusion

The TPS53624RHAT is a high-performance buck controller, ideally suited for use in a wide range of applications thanks to its wide input voltage range and robust protection measures. The device implements a high frequency PWM control scheme to provide accurate control of output voltage and current sense to meet the specific needs of the application. The TPS53624RHAT is available in an industrial temperature range of -40°C to 125°C.

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