LLC resonant controller with ultra-low standby power and high voltage startup
Product details
Parameters
Package | Pins | Size
Features
- Optimized low power mode and burst mode algorithm
- Burst mode with Soft-ON and Soft-OFF periods
- Minimized audible noise at no load and standby
- User option to disable burst mode
- Opto-coupler low power operation
- Efficiency performance exceeds DoE Level VI and EU CoC Tier-2 External Power Supply Standards
- Hybrid hysteretic control (HHC)
- Best-in-class transient response
- Fast exit from burst mode
- Robust adaptive dead-time control
- Integrated high-voltage gate driver with 0.6 A source and 1.2 A sink capability
- Robust capacitive region (ZCS) avoidance scheme
- Over temperature, output over voltage, input
under voltage protection, three levels
of over current protection - Integrated high voltage startup function
- Active X-capacitor discharge function
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Description
The UCC25640x is a fully featured LLC controller with integrated high-voltage gate driver. It has been designed to pair with a PFC controller to provide a complete power system using a minimum of external components. The resulting power system is designed to meet the most stringent requirements for standby power without the need for a separate standby power converter.
UCC25640x provides a highly efficient burst mode with soft-on and soft-off periods to minimize audible noise at standby operation. The burst power level and hysteresis are programmable, simplifying the optimization of efficiency and burst mode operation. Burst mode can also be disabled through pin configuration. UCC25640x uses hybrid hysteretic control to provide best in class line and load transient response.
UCC25640x includes a range of features designed to make LLC converter operation well controlled and protected. It can be used with UCC28056 or UCC28064A PFC controllers, along with UCC24624 synchronous rectifier controller to offer a complete power supply solution.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | UCC25640x LLC Resonant Controller with Ultra-Low Audible Noise and Standby Power datasheet (Rev. C) | Mar. 12, 2020 |
| Technical articles | How to reduce audible noise and power consumption at standby in your AC/DC design | Apr. 22, 2020 | |
| Application notes | Migrating to UCC25640x from UCC25630x (Rev. A) | Dec. 10, 2019 | |
| Application notes | Improving Transient Response in LLC Converters Using Hybrid Hysteretic Control (Rev. A) | Oct. 22, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Optimized burst mode function for low audible noise and low standby power
- Integrated high voltage startup and integrated gate drivers reducing total BOM count
- Robust protection features including overvoltage, overcurrent and zero current switching detection
- X capacitor discharge function
Software development
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOIC (DDB) | 14 | View options |
Ordering & quality
Support & training
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