TPS61132PWRG4

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TPS61132PWRG4 Application Field and Working Principle

The TPS61132PWRG4 is a multi-topology, spread-spectrum, synchronous boost converter with integrated 60-V/1.2-A power switch optimized for low-power, high-voltage applications. The device can operate at frequencies of up to 500 kHz, maximizing efficiency and reducing output noise, while its spread-spectrum frequency modulation feature lowers EMI emissions. The TPS61132PWRG4 is suitable for applications such as 5 V to 12 V LED driver or other LED applications, Class 3 high-efficiency AC/DC adapters, battery-powered LED lighting, and industrial, automotive, and medical applications.

The TPS61132PWRG4 belongs to the PMIC (power management IC) category and falls under voltage regulators, specifically the linear and switching type. PMICs are chips used in electronic devices that control the power distribution, voltage and current regulation, sequencing and protection against overvoltage and overheating. These chips are essential for the proper functioning of the device and help save power. Linear and switching regulators are designed to convert a voltage from one level to another with minimal power loss.

Working Principle

The TPS61132PWRG4 is an integrated boost converter that operates from an input voltage of 0.5 V to 5.5 V and provides an adjustable output voltage range from 1.2 V to VIN. The device contains an internal power switch and a synchronous rectifier, and its 600 mA gate drive allows for a wide area of operation. It is enabled through a low-active input and features internal soft-start, internal thermal shutdown, and diagnostics based on the EN/PWRGD pin.

The device operates with a peak current mode control architecture and utilizes a digital loop filter allowing use of small external components. It also supports an adjustable frequency from 50 kHz to 500 kHz, allowing for an optimized solution with minimized external components. In addition, the device has a Spread Spectrum Function (SSF) which makes the switching frequency vary slightly around the nominal frequency, reducing electromagnetic noise.

Furthermore, the TPS61132PWRG4 features an adaptative Current Limit Control (ALC) circuit that ensures constant output current at 0.85 â ‰ ¤ Vin â ‰¤ 5.5 V and no load to maximum load conditions. This regulation is done by sensing the output current of the device and adapting the output voltage accordingly. The device also supports a peak current limit up to 1.2A.

Conclusion

The TPS61132PWRG4 is a multi-topology, spread-spectrum, synchronous boost converter optimized for low-power, high-voltage applications. It is designed for applications such as 5V to 12V LED drivers, Class 3 high-efficiency AC/DC adapters, battery-powered LED lighting and industrial, automotive, and medical applications. It is part of the PMIC (Power Management IC) family, specifically falling under voltage regulators, linear and switching types. The device operates with a peak current mode control architecture, an adjustable frequency range from 50 kHz to 500 kHz and features an adaptative Current Limit Control circuit, ensuring constant output current.

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