CS5173ED8

Voltage - Output (Min/Fixed):	1.28V
Base Part Number:	CS5173
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	560kHz
Current - Output:	1.5A (Switch)
Voltage - Output (Max):	40V (Switch)
Series:	--
Voltage - Input (Max):	30V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost, Flyback, Forward Converter, SEPIC
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Obsolete
Packaging:	Tube

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CS5173ED8 Application Field and Working Principle

Introduction

CS5173ED8 is an integrated integrated switching regulator with innovative technologies for improving efficiency, performance, and simplicity in DC-to-DC applications. The integrated device comprises of two independent stages, an adjustable frequency buck regulator and a fixed frequency buck regulator. The device is designed to provide output voltages from 0.76V (for small loads) up to 24V to satisfy the requirements of large power systems. It is capable of working up to 3.2kW/module and with a wide operating temperature range from - 40°C to + 85°C, it is suitable for use in many industrial applications.

Application Field

The CS5173ED8 has a wide range of applications. It is suitable for use in communications, computer, office automation, and industrial equipment, such as base station, CNC machine, industrial computer, switching power source module and the like. It is also ideal for powering advanced distributed-power architectures, medical devices, and network application power supplies. The CS5173ED8 can be used to regulate output voltage in any type of load (resistive, capacitive or inductive) and can be used in DC/DC converter applications such as step-down, step-up, flyback, forward, and buck-boost architectures. It can also be used as a DC-DC converter for motor control, adjustable motor speed control and motor starting applications.

Working Principle

The CS5173ED8 is an integrated integrated switching regulator consisting of two independent stages, an adjustable frequency buck regulator and a fixed frequency buck regulator. In the adjustable frequency buck stage, an adjustable oscillator generates the switching frequency and synchronizes the operation of both independent stages. The switching of the two-stage synchronous rectification is controlled by the signals from the oscillator, the adjustable frequency and the controlled current limit. The outputs are filtered using the internal voltage compensation and the current limit circuits. The fixed frequency buck stage is a synchronous buck regulator with an adjustable current limit. The switching frequency of the fixed frequency buck stage is determined by the internal frequency divider. The divider acts as a frequency limiter, allowing for stable regulation over the input voltage range. The device also has two integrated analog and digital interfaces; one for voltage and current measurement and the other for remote control. The constant on-time feature of the device allows for a very small solution size compared to other solutions.

Conclusion

The CS5173ED8 is an integrated switching regulator that is perfectly suited for high efficiency DC-DC conversions in distributed-power architectures and motor control applications. Its wide operating temperature range and high efficiency makes it ideal for industrial use, and its simple and intuitive analog and digital interface make it simple to configure and use.

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