UCC25600

8 引脚高性能谐振模式控制器

The high performance, resonant mode controller is designed for dc-to-dc applications using resonant topologies, especially the LLC half-bridge resonant converter. This highly integrated controller implements frequency modulation control and complete system functions in only an 8-pin package. Switching to the UCC25600 will greatly simplify the system design and layout, and improve time to market, all at a price point lower than competitive 16-pin device offerings.

The internal oscillator supports the switching frequencies from 40 kHz to 350 kHz. This high-accuracy oscillator realizes the minimum switching frequency limiting with 4% tolerance, allowing the designer to avoid over-design of the power stage and, thus, further reducing overall system cost. The programmable dead time enables zero-voltage switching with minimum magnetizing current. This maximizes system efficiency across a variety of applications. The programmable soft-start timer maximizes design flexibility demanded by the varied requirements of end equipment using a half-bridge topology. By incorporating a 0.4-A source and 0.8-A sink driving capability, a low cost, reliable gate driver transformer is a real option.

The UCC25600 delivers complete system protection functions including overcurrent, UVLO, bias supply OVP, and overtemperature protection.

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Variable Switching Frequency Control

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Programmable Minimum Switching Frequency

With 4% Accuracy 3% Accuracy at Temperature

Range: –20°C to 105°C

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Programmable Maximum Switching Frequency

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Programmable Dead Time for Best Efficiency

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Programmable Soft-Start Time

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Easy ON and OFF Control

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Overcurrent Protection

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Overtemperature Protection

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Bias Voltage UVLO and Overvoltage Protection

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Integrated Gate Driver With 0.4-A Source and 0.8-

A Sink Capability

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Operating Temperature Range: –40°C to 125°C

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SOIC 8-Pin Package