TPS65288RHAT

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TPS65288RHAT Application Field and Working Principle

The TPS65288RHAT from Texas Instruments is a 4-channel step-down DC/DC switching regulator suitable for power management in palmtop, handheld, and laptop applications. It\'s designed to reduce overall board space and provide an efficient solution for space-constrained power applications. It also provides flexibility to configure the output voltage for different applications. This makes it an ideal choice for a wide range of power management requirements.

The TPS65288RHAT is a high performance switching regulator featuring a unique control Xtend™ feature that allows it to extend the output voltage range beyond the preset limit. This new feature significantly enhances system performance and increases output capacity by allowing the use of even higher load currents. Furthermore, the TPS65288RHAT has a wide input voltage range of 4.5 to 18 V, low dropout voltage, low quiescent current, and a frequency range of 250 kHz to 1 MHz.

The TPS65288RHAT can be used in a variety of applications, including handheld communications, portable medical, tablet computers, cordless phones, and portable instrumentation. It can be used for powering integrated circuit devices, LED displays, and other electronic devices. It is well suited for applications that demand high peak currents, low quiescent current, and efficient power management with extended output voltage range.

Working Principle

The TPS65288RHAT operates on the principle of pulse-width modulation (PWM) control. It contains two outputs, PWM_A and PWM_B. When used together, the two outputs are synchronized in order to enhance system performance and prevent signal interference. The PWM_A output has a voltage range of 0.6V to 6.0V, while the PWM_B output has a voltage range of 0.7V to 7.0V.

The PWM_A and PWM_B outputs are driven by an on-chip, high-frequency oscillator. In addition, the TPS65288RHAT includes an accurate programmable PWM clock frequency of 1300 kHz, resulting in low switching losses and a fast transient response. The switching frequency can be adjusted to as low as 250 kHz to optimize efficiency. In addition, the TPS65288RHAT can be programmed to either a constant frequency mode or a pulse-skipping frequency-hopping mode for highest efficiency at light loads.

The TPS65288RHAT also includes a high current power MOSFET switch for each output. The combination of an on-chip high frequency oscillator and the power MOSFET switch enable the device to achieve a high level of power efficiency during low power operation. The output current is controlled via a high performance compensation network that allows for a wide output voltage range.

Lastly, the TPS65288RHAT features a range of protection features such as over-current and thermal protection. These protection features help ensure that the device is operating safely and efficiently at all times. In addition, the device includes on-chip circuit protection such as reverse current limiting, over-voltage protection, and under-voltage threshold protection.

Conclusion

The TPS65288RHAT from Texas Instruments is an efficient, high performance 4-channel step-down DC/DC switching regulator designed for power management in palmtop, handheld, and laptop applications. Its features such as Xtend™ control, wide input voltage range, low dropout voltage, low quiescent current, and a frequency range of 250 kHz to 1 MHz make it an ideal choice for a wide range of applications. It is well suited for applications that demand high peak currents, low quiescent current, and efficient power management with extended output voltage range.

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