S-1702MGC05-I6T1U

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Converter, Battery Powered Devices
Voltage - Input:	2 V ~ 6.5 V
Number of Outputs:	1
Voltage - Output:	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	6-SMD, Flat Leads
Supplier Device Package:	SNT-6A

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S-1702MGC05-I6T1U Application Field and Working Principle

Introduction

The S-1702MGC05-I6T1U is a switch-mode power factor correction (PFC) IC that includes PFC boost controller, active PFC valley-fill, operating current detector, and soft-start function. This IC is designed to control the boost PFC converter with its unique current-mode PFC controller and active valley-fill, providing high power factor, excellent load and line transient response, and low EMI filter cost, particularly at low power ranges. The device also includes adjustable deadtime, slope compensation, output offset voltage, and delays in order to optimize the system.

Application Field

The S-1702MGC05-I6T1U is suitable for a wide range of applications such as power factor correction, DC/DC converter, AC/DC adapter, active PFC, and more. Its output voltage is adjustable from 4V to 60V and its peak current is up to 20A.The S-1702MGC05-I6T1U is well-suited for telecommunications, data systems, computer peripherals, and other AC/DC power supplies that require a high power factor, low distortion, and low output noise. This device can also be used in automotive, industrial, and consumer applications where the size and cost of the power supply are critical.

Working Principle

The principle of S-1702MGC05-I6T1U operation is based on the current-mode control with active valley-fill. The valley-fill based system ensures continuous conduction in the boost power factor converter.The output voltage of S-1702MGC05-I6T1U is set by the resistor divider connected to the Vref pin. The current mode PFC controller monitors the voltage across the resistor divider and sends a control signal to the gate of the power switch. This control signal increases or decreases the switching frequency, thus making the converter more or less efficient.The maximum current of the power converter is limited by the current-mode control. Maximum current is limited by a peak current limit circuit, which is set by a resistor connected between pins CP-LIM and VCC. The current control is provided by the external current sense resistor between pins Ip-LIM and IP-SET.

Conclusion

The S-1702MGC05-I6T1U is a unique switch-mode PFC IC that can be used in a wide range of applications such as power factor correction, DC/DC converter, AC/DC adapter, active PFC, and more. It can provide high power factor, excellent load and line transient response, low EMI filter cost, adjustable deadtime, slope compensation, output offset voltage, and delays. Based on its current-mode control with active valley-fill and its adjustable parameters, the S-1702MGC05-I6T1U is well-suited for many applications, particularly those that require a size and cost-efficient power supply.

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