UCC28951QPWRQ1 is an advanced Phase-Shifted Full-Bridge (PSFB) PWM controller from TI, and an enhanced version of the UCC28950, optimized for high-efficiency high-power DC-DC power conversion. The device supports a wide 4.5V~12V bias voltage range with operating frequencies up to 1MHz, supporting Zero-Voltage Switching (ZVS) soft-switching technology that significantly reduces switching losses and improves efficiency.

The controller features advanced closed-loop soft-start control that dynamically adjusts the startup process based on load conditions, preventing output voltage overshoot and inrush current. The synchronous rectification (SR) control function optimizes the drive timing of secondary-side synchronous rectifier MOSFETs, further reducing conduction losses and improving overall conversion efficiency.

Comprehensive protection features include: overcurrent protection (OCP), overvoltage protection (OVP), undervoltage lockout (UVLO), overtemperature shutdown (OTP), and closed-loop soft-start. The compact TSSOP-16 package is AEC-Q100 qualified, widely used in automotive DC-DC converters, charging stations, server power supplies, and industrial power applications.

Note: For detailed electrical parameters, refer to the official TI UCC28951 datasheet. Specifications are subject to change without notice. Design engineers should verify all parameters before final design.

UCC28951QPWRQ1 uses the TSSOP-16 (16-pin Thin Shrink Small Outline Package), compact with small pin pitch, suitable for space-constrained power module designs. The TSSOP-16 package integrates all PWM controller functional pins including drive outputs, feedback input, protection settings, and bias supply pins.

The pin definition is clear, suitable for standard SMT assembly. PCB layout requires short wide drive output traces to minimize impedance, and synchronous rectification control signals need controlled timing delay. The package is RoHS compliant and AEC-Q100 automotive-grade qualified.

UCC28951QPWRQ1 TSSOP-16 functional pin definitions:

• OUTA / OUTB (Half-Bridge Drive Outputs): Primary-side half-bridge A/B high-side and low-side PWM drive outputs, driving the full-bridge switching devices.
• OUTC / OUTD (Half-Bridge Drive Outputs): Primary-side half-bridge C/D PWM drive outputs, forming a phase-shifted full-bridge with OUTA/OUTB.
• SYNC (Synchronous Signal): Synchronous rectification control signal output, controlling secondary-side SR MOSFET switching timing.
• COMP (Error Amplifier Output): Voltage-mode PWM comparator input, connected to compensation network.
• FB (Feedback Input): Output voltage feedback input, connected to optocoupler or resistor divider network.
• CS (Current Sense): Overcurrent sense input, connected to current transformer or sense resistor.
• VREF (Reference Voltage): 5V reference voltage output.
• VCC (Bias Supply): 4.5V~12V bias power input.
• GND (Ground): Device ground pin; analog and power grounds should be routed separately.

The following alternative parts are listed for reference. Before selecting an alternative, verify communication interface, supply voltage, security algorithm compatibility, and software API differences.

Texas Instruments (NASDAQ: TXN), headquartered in Dallas, Texas, USA, is one of the world's largest analog semiconductor companies. TI offers a complete AC-DC and DC-DC power management product line, from PWM controllers to integrated power stages, covering all power design needs from consumer electronics to automotive electronics.

TI has multiple technical support centers and local warehouses in China, enabling fast response to domestic customer needs for samples and volume production.