UCC35702D

Frequency - Switching:	100kHz
Base Part Number:	UCC35702
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Frequency Control, Sequencing, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	8.8 V ~ 15 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

The UCC35702D is a switching controller designed for use in the development of Point of Load (POL) and Polymer Point of Load (PPL) DC/DC converters. Utilizing a Zero Voltage Switching (ZVS) method, the UCC35702D is capable of offering continuous operation up to 94% efficiency with extremely low EMI/EMC compliance. The device also actively tracks the desired duty cycle setting, thus providing more accurate output voltages than comparable solutions.

Application Field

The UCC35702D is a universal controller for both synchronous and asynchronous converters. It is ideal for use in medical and industrial applications, as well as automotive, battery power systems, and notebook computers. The UCC35702D can also be used in a variety of applications including distributed power systems, point-of-load conversion, and motor control.

Working Principle

The UCC35702D utilizes a Zero Voltage Switching (ZVS) technique in order to achieve both high efficiency and low EMI/EMC compliance. With this technique, the switching transistors are driven into the active region without a voltage spike occurring across them. This causes the switch to turn “on” and “off” at zero voltage, resulting in minimal power losses.In addition to the ZVS method, the UCC35702D also actively tracks the desired duty cycle setting. This ensures that the output voltage is accurately maintained, regardless of changes in load or input conditions. To further increase efficiency and reduce losses, the device can be used in synchronous or asynchronous converters.

Conclusion

The UCC35702D is a highly efficient, low EMI/EMC switching controller designed specifically for POL and PPL DC/DC conversion applications. Utilizing a Zero Voltage Switching technique, the device is able to operate at up to 94% efficiency while actively tracking the desired duty cycle setting. The device can also be used in both synchronous and asynchronous converters, allowing for further efficiency and power savings. Overall, the UCC35702D is an excellent choice for powering a variety of applications, such as medical and industrial equipment, automotive systems, battery power systems, and more.

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