Phase-Shifted Full-Bridge Controller with Synchronous Rectification using UCC28950
This Phase-shifted Full-Bridge controller with synchronous rectification carrier board contains all of the features necessary to implement a phase-shifted full-bridge with a synchronous rectification topology power converter. All inputs and output pins are accessible using a header connector. A High-efficiency DC-DC converter can be created using this carrier board + external H-Bridge and Transformer. Refer to the datasheet of UCC28950 and schematic to configure the various frequencies, current feedback, voltage feedback and delays.
Features
- Operating power supply 12V (Range 8V to 17V DC)
- Internal reference voltage 5V
- Converter switching frequency setting range, FSW (nom) 50-1000Khz
- Programmable delay range between OUTA, OUTB and OUTC, OUTD set by resistors DELAB and DELCD and parameter KA(1) : 30ns-1000ns
- Programmable delay range between OUTA, OUTF and OUTB, OUTE set by resistor DELEF, and parameter KEF(1): 30ns-1400ns
- Programmable DCM range as percentage of voltage at CS(1) : 5% – 30%
- Programmable TMIN range: 100ns-800ns
- Enhanced Wide Range Resonant Zero Voltage Switching (ZVS) Capability
- Direct Synchronous Rectifier (SR) Control
- Light-Load Efficiency Management Including
- Burst Mode Operation
- Discontinuous Conduction Mode (DCM), Dynamic SR On and Off Control with Programmable Threshold
- Programmable Adaptive Delay
- Average or Peak Current Mode Control with Programmable Slope Compensation and Voltage Mode Control
- Naturally Handles Pre-Biased Start Up with DCM Mode
- Closed Loop Soft Start and Enable Function
- Programmable Switching Frequency up to 1 MHz with Bi-Directional Synchronization
- (±3%) Cycle-by-Cycle Current Limit Protection with Hiccup Mode Support
- 150-µA Start-Up Current
- VDD Undervoltage Lockout
- Wide Temperature Range –40°C to +125°C
- PCB Dimensions 36.20 x 25.24 mm
Connections: Connectors CN1
- Pin 1 VS = Voltage Sense (Voltage Feedback)
- Pin 2 VCC = Power Supply 12V DC (Range 8V-17VDC)
- Pin 3 = GND
- Pin 4 = Enable/Soft start
- Pin 5 = Output A
- Pin 6 = Output B
- Pin 7 = Output C
- Pin 8 = Output D
- Pin 9 = Output E
- Pin 10 = Output F
- Pin 11 = SYNC
- Pin 12 = GND
- Pin 13 = Current Sense (Current Feedback)
- Pin 14 = VREF 5V DC
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This Phase-shifted Full-Bridge controller with synchronous rectification carrier board contains all of the features necessary to implement a phase-shifted full-bridge with a synchronous rectification topology power converter. All inputs and output pins are accessible using a header connector. A High-efficiency DC-DC converter can be created using this carrier board + external H-Bridge and Transformer. Refer to the datasheet of UCC28950 and schematic to configure the various frequencies, current feedback, voltage feedback and delays.
Features
- Operating power supply 12V (Range 8V to 17V DC)
- Internal reference voltage 5V
- Converter switching frequency setting range, FSW (nom) 50-1000Khz
- Programmable delay range between OUTA, OUTB and OUTC, OUTD set by resistors DELAB and DELCD and parameter KA(1) : 30ns-1000ns
- Programmable delay range between OUTA, OUTF and OUTB, OUTE set by resistor DELEF, and parameter KEF(1): 30ns-1400ns
- Programmable DCM range as percentage of voltage at CS(1) : 5% – 30%
- Programmable TMIN range: 100ns-800ns
- Enhanced Wide Range Resonant Zero Voltage Switching (ZVS) Capability
- Direct Synchronous Rectifier (SR) Control
- Light-Load Efficiency Management Including
- Burst Mode Operation
- Discontinuous Conduction Mode (DCM), Dynamic SR On and Off Control with Programmable Threshold
- Programmable Adaptive Delay
- Average or Peak Current Mode Control with Programmable Slope Compensation and Voltage Mode Control
- Naturally Handles Pre-Biased Start Up with DCM Mode
- Closed Loop Soft Start and Enable Function
- Programmable Switching Frequency up to 1 MHz with Bi-Directional Synchronization
- (±3%) Cycle-by-Cycle Current Limit Protection with Hiccup Mode Support
- 150-µA Start-Up Current
- VDD Undervoltage Lockout
- Wide Temperature Range –40°C to +125°C
- PCB Dimensions 36.20 x 25.24 mm
Connections: Connectors CN1
- Pin 1 VS = Voltage Sense (Voltage Feedback)
- Pin 2 VCC = Power Supply 12V DC (Range 8V-17VDC)
- Pin 3 = GND
- Pin 4 = Enable/Soft start
- Pin 5 = Output A
- Pin 6 = Output B
- Pin 7 = Output C
- Pin 8 = Output D
- Pin 9 = Output E
- Pin 10 = Output F
- Pin 11 = SYNC
- Pin 12 = GND
- Pin 13 = Current Sense (Current Feedback)
- Pin 14 = VREF 5V DC
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