SGLS183C August   2003  – July 2025 UCC2808A-1Q1 , UCC2808A-2Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configurations and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pin Descriptions
        1. 7.3.1.1 COMP Pin
        2. 7.3.1.2 OUTA and OUTB Pins
        3. 7.3.1.3 RC Pin
        4. 7.3.1.4 VDD Pin
    4. 7.4 Device Functional Modes
      1. 7.4.1 VCC
      2. 7.4.2 Push-Pull or Half-Bridge Function
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5 Pin Configurations and Functions

UCC2808A-1Q1 UCC2808A-2Q1
Table 5-1 Pin Functions
PIN TYPE(1) DESCRIPTION
NAME NO.
COMP 1 I/O COMP is the output of the error amplifier and the input of the PWM comparator. See also Section 7.3.1.1.
CS 3 I The input to the PWM, peak current, and overcurrent comparators. The overcurrent comparator is only intended for fault sensing. Exceeding the overcurrent threshold causes a soft start cycle. An internal MOSFET discharges the current sense filter capacitor to improve dynamic performance of the power converter.
FB 2 I The inverting input to the error amplifier. For best stability, keep FB lead length as short as possible and FB stray capacitance as small as possible.
GND 5 G Reference ground and power ground for all functions. Due to high currents, and high frequency operation of the UCC2808A-xQ1, a low impedance circuit board ground plane is highly recommended.
OUTA 7 I/O Alternating high current output stages. Both stages are capable of driving the gate of a power MOSFET. Each stage is capable of 500mA peak-source current, and 1A peak-sink current. See also Section 7.3.1.2.
OUTB 6
RC 4 I The oscillator programming pin. The oscillator of the UCC2808Ax-Q1 tracks VDD and GND internally, so that variations in power supply rails minimally affect frequency stability. See also Section 7.3.1.3.
VDD 8 P

The power input connection for this device. See also Section 7.3.1.4.
(1) I = Input, O = Output, I/O = Input or Output, G = Ground, P = Power.