UC3525BDWG4

Frequency - Switching:	100Hz ~ 400kHz
Base Part Number:	UC3525B
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Dead Time Control, Frequency Control, Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	49%
Series:	--
Voltage - Supply (Vcc/Vdd):	8 V ~ 35 V
Output Phases:	1
Number of Outputs:	2
Topology:	Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
Output Configuration:	Positive
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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UC3525BDWG4 Application Field and Working Principle

Introduction to UC3525BDWG4

The UC3525BDWG4 is a high-efficiency, low-voltage, single-channel, fixed-frequency PWM control integrated circuit designed for switching regulator and DC-DC controller applications. It features a regulated 5V output voltage and is capable of providing up to 500mA of output current. The UC3525BDWG4 is capable of operating at frequencies ranging from 1kHz to 100kHz and is capable of providing a wide range of output voltages and current values.

Applications

The UC3525BDWG4 is well-suited for making high-efficiency, high-frequency switching regulators and DC-DC controllers. This IC is widely used in a variety of applications such as:

• Portable communication devices
• Battery-powered devices
• Low-power lighting
• RGB LED Drivers
• DC-DC buck regulators
• Step-up, flyback, and pressdown converters

Working Principle

The UC3525BDWG4 operates through pulse-width modulation (PWM) control. It has an oscillator section and a comparator section. The oscillator section is responsible for producing the pulse signal that controls the output voltage. The frequency of the signal is set by a resistor and capacitor connected to the control pin of the IC. The comparator section uses a voltage reference and the voltage signal at the output of the IC to compare and set the pulse width. A feedback signal is used to set the output voltage, and the pulse width is adjusted accordingly. The width of the pulse signal is adjusted so that the output voltage remains close to the target voltage.

Conclusion

The UC3525BDWG4 is a high-efficiency, low-voltage, single-channel, fixed-frequency PWM control integrated circuit that is well-suited for use as a switching regulator and DC-DC controller. It is capable of providing a wide range of output voltages and currents and can be used in various applications such as portable communication devices, battery-powered devices, low-power lighting, and RGB LED Drivers. The IC uses pulse-width modulation to control the output voltage and the width of the pulse signal is adjusted so that the output voltage stays close to the target voltage.

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