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  • UCCx8C5x Low-Power Current-Mode High-Performance PWM Controller for Si and SiC MOSFETs

    • SLUSER8C June   2022  – March 2023 UCC28C50 , UCC28C51 , UCC28C52 , UCC28C53 , UCC28C54 , UCC28C55 , UCC28C56H , UCC28C56L , UCC28C57H , UCC28C57L , UCC28C58 , UCC28C59 , UCC38C50 , UCC38C51 , UCC38C52 , UCC38C53 , UCC38C54 , UCC38C55

      PRODUCTION DATA  

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  • UCCx8C5x Low-Power Current-Mode High-Performance PWM Controller for Si and SiC MOSFETs
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Detailed Pin Description
        1. 8.3.1.1 COMP
        2. 8.3.1.2 FB
        3. 8.3.1.3 CS
        4. 8.3.1.4 RT/CT
        5. 8.3.1.5 GND
        6. 8.3.1.6 OUT
        7. 8.3.1.7 VDD
        8. 8.3.1.8 VREF
      2. 8.3.2  Undervoltage Lockout
      3. 8.3.3  ±1% Internal Reference Voltage
      4. 8.3.4  Current Sense and Overcurrent Limit
      5. 8.3.5  Reduced-Discharge Current Variation
      6. 8.3.6  Oscillator Synchronization
      7. 8.3.7  Soft-Start Timing
      8. 8.3.8  Enable and Disable
      9. 8.3.9  Slope Compensation
      10. 8.3.10 Voltage Mode
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation
      2. 8.4.2 UVLO Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Input Bulk Capacitor and Minimum Bulk Voltage
        2. 9.2.2.2  Transformer Turns Ratio and Maximum Duty Cycle
        3. 9.2.2.3  Transformer Inductance and Peak Currents
        4. 9.2.2.4  Output Capacitor
        5. 9.2.2.5  Current Sensing Network
        6. 9.2.2.6  Gate Drive Resistor
        7. 9.2.2.7  VREF Capacitor
        8. 9.2.2.8  RT/CT
        9. 9.2.2.9  Start-Up Circuit
        10. 9.2.2.10 Voltage Feedback Compensation
          1. 9.2.2.10.1 Power Stage Poles and Zeroes
          2. 9.2.2.10.2 Slope Compensation
          3. 9.2.2.10.3 Open-Loop Gain
          4. 9.2.2.10.4 Compensation Loop
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 Precautions
        2. 9.4.1.2 Feedback Traces
        3. 9.4.1.3 Bypass Capacitors
        4. 9.4.1.4 Compensation Components
        5. 9.4.1.5 Traces and Ground Planes
      2. 9.4.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  11. 11Mechanical, Packaging, and Orderable Information
  12. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • D|8
    • MSOI002K
  • DGK|8
    • MPDS028E
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • sluser8c_oa
  • sluser8c_pm
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
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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
PARAMETERUCCx8C4xUCCx8C5x
Supply current at 52 kHz2.3 mA1.3 mA
Startup current (max)100 µA75 µA
VDD abs max20 V30 V
Reference Voltage Accuracy±2%±1%
UVLO and DMAX for Si FET6 options6 options
UVLO and DMAX for SiC FETnone6 options
Smallest package optionVSSOP (8)VSSOP (8)

The UCCx8C5x family is offered in 8-pin VSSOP (DGK), and 8-pin SOIC (D) packages.

Device Information
PART NUMBERPACKAGE(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.
GUID-20221102-SS0I-708N-CNP5-HV7QXLTZPQC1-low.svgSimplified Application

4 Revision History

Changes from Revision B (February 2023) to Revision C (March 2023)

  • Initial release of the UCC28C56L, UCC38C53, and UCC38C55 devicesGo

Changes from Revision A (October 2022) to Revision B (February 2023)

  • Initial release of the UCC28C50, UCC28C51, UCC28C52, UCC28C53, UCC28C54, UCC28C55, UCC28C57H, UCC28C57L, UCC38C50, UCC38C51, UCC38C52, and UCC38C54 deviceGo
  • Corrected Figure 8-5 Oscillator Synchronization Circuit Go

5 Device Comparison Table

UVLOJunction Temperature (TJ) (°C)Maximum duty cycle
Turn on at 14.5 V
Turn off at 9 V
for off-line applications		Turn on at 8.4 V
Turn off at 7.6 V
for dc/dc applications		Turn on at 7 V
Turn off at 6.6 V
for battery applications
UCC28C52UCC28C53UCC28C50–40 to 125100%
UCC38C52UCC38C53UCC38C500 to 85
UCC28C54UCC28C55UCC28C51–40 to 12550%
UCC38C54UCC38C55UCC38C510 to 85
UVLOJunction
Temperature (TJ) (°C)		Maximum duty cycle
Turn on at 18.8 V
Turn off at 15.5 V
Suitable for HV applications using GEN-I SiC MOSFET		Turn on at 18.8 V
Turn off at 14.5 V
Suitable for HV applications using GEN-II SiC MOSFET		Turn on at 16 V
Turn off at 12.5 V
Suitable for HV applications using GEN-III SiC MOSFET
UCC28C56HUCC28C56LUCC28C58–40 to 125100%
UCC28C57HUCC28C57LUCC28C59–40 to 12550%

 
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