DATA SHEET
UCCx8C5x Low-Power Current-Mode High-Performance PWM Controller for Si and SiC MOSFETs
1 Features
- Undervoltage lockout options to support both Si and SiC MOSFET applications
- 30-V VDD absolute maximum voltage
- 1-MHz maximum fixed frequency operation
- 50-μA startup current, 75-μA maximum
- Low operating current: 1.3 mA (at fOSC = 52 kHz)
- Fast 35-ns, cycle-by-cycle overcurrent limiting
- ±1-A peak driving current
- Rail-to-rail output
- 25-ns rise time
- 20-ns fall time
- ±1% accurate 2.5-V error amplifier reference
- Pin-to-pin compatible and drop-in replacement for UCCx8C4x
- Functional Safety-Capable
- Documentation available to aid functional safety system design
2 Applications
- General purpose single-ended DC-DC or off-line isolated power converters
- Auxiliary power supply for solar power inverters, motor drives, energy storage systems
- Isolated power supply for EV charging stations
3 Description
The UCCx8C5x family of devices are high-performance current-mode PWM controllers that can drive both Si and SiC MOSFETs in various applications. The UCCx8C5x family is a more efficient and robust version of the UCCx8C4x.
The UCCx8C5x family has new UVLO thresholds that allow for reliable SiC MOSFET operation (UCC28C56-59), in addition to existing UVLO thresholds for continued Si MOSFET support (UCCx8C50-55).
VDD absolute maximum voltage rating is extended from 20 V to 30 V for optimally driving the gate of 20-Vgs, 18-Vgs, or 15-Vgs SiC MOSFETs, while also allowing for the exclusion of an external LDO.
Device Performance Improvements
| PARAMETER | UCCx8C4x | UCCx8C5x |
|---|---|---|
| Supply current at 52 kHz | 2.3 mA | 1.3 mA |
| Startup current (max) | 100 µA | 75 µA |
| VDD abs max | 20 V | 30 V |
| Reference Voltage Accuracy | ±2% | ±1% |
| UVLO and DMAX for Si FET | 6 options | 6 options |
| UVLO and DMAX for SiC FET | none | 6 options |
| Smallest package option | VSSOP (8) | VSSOP (8) |
The UCCx8C5x family is offered in 8-pin VSSOP (DGK), and 8-pin SOIC (D) packages.
Device Information
| PART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
|---|---|---|
| UCC28C50, UCC28C51 UCC28C52, UCC28C53, UCC28C54, UCC28C55, UCC38C50, UCC38C51 UCC38C52, UCC38C53 UCC38C54, UCC38C55 | SOIC (8) | 3.91 mm × 4.90 mm |
| VSSOP (8) | 3.00 mm × 3.00 mm | |
| UCC28C56H, UCC28C56L UCC28C57H, UCC28C57L, UCC28C58, UCC28C59 | SOIC (8) | 3.91 mm × 4.90 mm |
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Application
