TPS54626PWP

Voltage - Output (Min/Fixed):	0.765V
Base Part Number:	TPS54626
Supplier Device Package:	14-HTSSOP
Package / Case:	14-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	650kHz
Current - Output:	6.5A
Voltage - Output (Max):	5.5V
Series:	SWIFT™, D-CAP2™, Eco-Mode™
Voltage - Input (Max):	18V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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TPS54626PWP Application Field and Working Principle

The TPS54626PWP is a synchronous step-down DC-DC converter designed for high current applications. The device is designed to deliver 10A of continuous output current over a wide input voltage range of 4.5V to 20V while still maintaining an overall low system cost, small form factor, and high efficiency. The TPS54626PWP integrates many of the features required for high current DC-DC converters, including an internal power switch with over-current protection, output voltage accuracy and ripple waveforms, adjustable frequency and soft-start, and over-temperature protection.The TPS54626PWP is suitable for any application which requires a reliable, efficient, and cost-effective high-current power supply. Typical applications include servers, storage, networking, FPGA, and other high power applications.

Functional Diagram

The TPS54626PWP is a synchronous buck converter with two internal power MOSFETs in a single 12-pin package. It has an input voltage range of 4.5V to 20V, an adjustable output voltage of 0V to 90% of the input voltage, and a maximum output current of 10A. Figure 1 shows the functional diagram of the device. The MOSFETs are connected to and controlled by the Internal High Side Driver (HSDRV) and the Internal Low Side Driver (LSDRV). The HSDRV and LSDRV are controlled through a control loop that uses a voltage reference and comparator. The voltage reference senses the output voltage and provides a feedback signal to the comparator which adjusts the duty cycle of the MOSFETs to keep the output voltage within a predetermined range.

Working Principle

The TPS54626PWP works by converting an input voltage to an adjustable, regulated output voltage. When the TPS54626PWP is powered on, the internal high side MOSFET (HS) is switched to turn on. This allows the input voltage to flow through the internal inductor, and the energy stored in the inductor is then released to the output capacitor which is used to charge the output voltage. The voltage of the output capacitor is regulated by the internal error amplifier and comparator which continuously monitors the output voltage and adjusts the duty cycle of the MOSFETs accordingly. The duty cycle represents the amount of time that the HS and LS MOSFETs are turned on during a single pulse-width modulation (PWM) cycle. As the output voltage approaches its target voltage, the duty cycle is decreased to reduce the amount of current flowing to the output capacitor. The TPS54626PWP also includes several other features to help ensure reliability and efficiency. One such feature is the over-current protection (OCP) which is designed to protect the device from excessive current. The OCP limits the output current of the device to a predetermined limit to prevent damage to the MOSFETs or other components.

Conclusion

The TPS54626PWP is a cost-effective, efficient, and reliable step-down DC-DC converter designed for high current applications. It provides an adjustable output voltage range of 0V to 90% of the input voltage, and a maximum output current of 10A. The device offers adjustable frequency and soft-start, over-current protection, and over-temperature protection. The TPS54626PWP is a highly suitable choice for any application which requires a reliable and efficient high-current power supply.

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