UCC28950PW
| Parameters | |
|---|---|
| Factory Lead Time | 1 Week |
| Lifecycle Status | ACTIVE (Last Updated: 3 days ago) |
| Mounting Type | Surface Mount |
| Package / Case | 24-TSSOP (0.173, 4.40mm Width) |
| Surface Mount | YES |
| Number of Pins | 24 |
| Operating Temperature | -40°C~125°C TJ |
| Packaging | Tube |
| JESD-609 Code | e4 |
| Pbfree Code | yes |
| Part Status | Active |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Number of Terminations | 24 |
| ECCN Code | EAR99 |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Additional Feature | ALSO OPERATES IN CURRENT MODE AND AVERAGE CURRENT MODE AND PWM CONTROL TECHNIQUE ALSO POSSIBLE |
| Subcategory | Switching Regulator or Controllers |
| Technology | BICMOS |
| Terminal Position | DUAL |
| Terminal Form | GULL WING |
| Peak Reflow Temperature (Cel) | 260 |
| Frequency | 1MHz |
| Base Part Number | UCC28950 |
| Function | Step-Up/Step-Down |
| Number of Outputs | 6 |
| Output Voltage | 5V |
| Output Type | Transistor Driver |
| Operating Supply Voltage | 12V |
| Input Voltage-Nom | 12V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Output Configuration | Positive |
| Output Current | 20mA |
| Voltage - Supply (Vcc/Vdd) | 8V~17V |
| Max Supply Current | 10mA |
| Output Power | 1.12W |
| Control Features | Dead Time Control, Enable, Frequency Control, Soft Start |
| Topology | Full-Bridge |
| Control Mode | VOLTAGE-MODE |
| Frequency - Switching | 50kHz~1MHz |
| Control Technique | PHASE-SHIFT CONTROL |
| Synchronous Rectifier | Yes |
| Nominal Input Voltage | 3.6V |
| Switcher Configuration | PHASE-SHIFT |
| Max Duty Cycle | 97 % |
| Duty Cycle (Max) | 95% |
| Output Phases | 1 |
| Height | 1.2mm |
| Length | 7.8mm |
| Width | 4.4mm |
| Thickness | 1mm |
| Radiation Hardening | No |
| REACH SVHC | No SVHC |
| RoHS Status | ROHS3 Compliant |
| Lead Free | Lead Free |
UCC28950PW Full-bridge Controller Description
The UCC28950 enhanced phase-shifted controller expands on Texas Instruments' industry-standard UCx895 phase-shifted controller family, offering best-in-class efficiency in today's high-performance power systems. The UCC28950 implements advanced full-bridge control as well as active control of the synchronous rectifier output stage.
The primary-side signals allow for programmable delays to ensure ZVS operation over a wide load current and input voltage range, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers, maximizing overall system efficiency.
The UCC28950 also includes a burst mode and dynamic SR on/off control when transitioning into and out of Discontinuous Current Mode (DCM) operation, ensuring ZVS operation is extended down to much lighter loads.
UCC28950PW Full-bridge Controller Features
Voltage Mode Control
(±3%) Cycle-by-Cycle Current Limit Protection With Hiccup Mode Support
Programmable Switching Frequency up to 1 MHz with Bi-Directional Synchronization
Direct Synchronous Rectifier (SR) Control
Enhanced Wide Range Resonant Zero Voltage Switching (ZVS) Capability
Average or Peak Current Mode Control
VDD Undervoltage Lockout
Closed Loop Soft Start and Enable Function
Programmable Slope Compensation
Discontinuous Conduction Mode (DCM), Dynamic SR On and Off Control with Programmable Threshold
Programmable Adaptive Delay
Burst Mode Operation
Naturally Handles Pre-Biased Start-Up With DCM Mode
150-μA Start-Up Current
Wide Temperature Range –40°C to +125°C
Full-bridge Full-bridge Controller Applications
Datacom, Telecom, and Wireless Base-Station
High-Density Power Architectures
Phase-Shifted Full-Bridge Converters
Solar Inverters, and Electric Vehicles
Power
Server, Power Supplies
Industrial Power Systems
