CS5307GDWR24 Integrated Circuits (ICs)

Frequency - Switching:	200kHz ~ 800kHz
Base Part Number:	CS5307
Supplier Device Package:	24-SOIC
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Frequency Control, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	8 V ~ 18 V
Output Phases:	4
Number of Outputs:	4
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	PWM Signal
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The CS5307GDWR24 is a three-phase synchronous rectifier controller designed for applications in dc-dc power conversion. It is a variant of the standard CS5307 increasing its robustness and integrated feature set. Using its onboard driver and fault tolerant design, the CS5307GDWR24 switching controller offers a comprehensive solution for dc-dc applications from 1A to 700A, making it an ideal choice for demanding applications such as automotive, telecom, IT and industrial.

Features

The CS5307GDWR24 is designed for synchronous rectification, phase balancing and overload protection. The controller supports de-rating and burst-mode operation and features adjustable fault-start conditions, allowing the device to be tailored for specific applications. The fault monitoring and control logic can be programmed in-system using the onboard GPIOs and is ideal for applications requiring a robust, adjustable and automated system supervision.The CS5307GDWR24 includes three dedicated intelligent high side drivers that support low-impedance performance, allowing decoupling of the amount of power produced and consumed at the same point in time. Furthermore, the device features programmable high-side and low-side drivers that can be used to create a controllable inrush current profile, preventing excessive peak current demand from the power supply. The operating temperature range for the CS5307GDWR24 is -40° to +125°C, and the input voltage range is 4.2V to 18V. The device offers various output and fault protection modes, as well as in-system programming of all parameters.

Application Field and Working Principle

The CS5307GDWR24 is ideal for use in systems requiring high current and high power. Typical applications include brushless direct current (BLDC) and permanent-magnet synchronous motor (PMSM) drivers, ac-dc power converters and dc-dc converters.The CS5307GDWR24 works by utilizing the power FETs of the rectifier stage to create voltage and current balances by adjusting the duty cycles of the high-side and low-side drivers. When a load is being supplied from the output of the rectifier stage, the controller will monitor the balance between them, providing the proper duty cycles to each of the power FETs of the rectifier stage to maintain the voltage and current balance. By monitoring the output at the rectifying stage and adjusting the duty cycles accordingly, the controller ensures the proper flow of power to the load regardless of its varying needs.Additionally, the CS5307GDWR24 supports phase-balancing and in-system programming of all parameters. The phase-balancing feature helps maintain a balanced load across the sources, reducing losses and improving circuit efficiency. The in-system programming features allow parameters, such as PWM frequency, predetermined signal levels, fault-thresholds and initial PWM pulse widths, to be set through an external terminal, which increases configurability and timesaving while reducing component costs.

Conclusion

The CS5307GDWR24 switching controller is an ideal solution for applications requiring a robust and fault-tolerant dc-dc conversion system. Featuring its own driver, fault monitoring and control logic, adjustable fault-start conditions, low-impedance performance, de-rating and burst-mode operation, and in-system programming capability, the CS5307GDWR24 is designed for synchronous rectification, phase balancing, overload protection, and efficiency control. It is ideal for use in a variety of systems requiring high current and high power, including brushless direct current (BLDC) and permanent-magnet synchronous motor (PMSM) drivers, ac-dc power converters and dc-dc converters.

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