SLUUCZ9B January   2024  – May 2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
      1. 1.3.1 U1 Component Selection
      2. 1.3.2 UCC33420-Q1 Pin Definition
    4. 1.4 Specification
  7. 2Hardware
    1. 2.1 EVM Setup and Operation
      1. 2.1.1 Recommended Test Equipment
      2. 2.1.2 External Connections for Easy Evaluation
      3. 2.1.3 Powering the EVM
      4. 2.1.4 EVM Test Points
      5. 2.1.5 Oscilloscope Probes: Probing the EVM
  8. 3Implementation Results
    1. 3.1 Schematic
    2. 3.2 Performance Data
      1. 3.2.1 Efficiency Data
      2. 3.2.2 Regulation Data
      3. 3.2.3 Startup Waveforms
      4. 3.2.4 Inrush Current
      5. 3.2.5 AC Ripple Voltage
      6. 3.2.6 Load Transient
      7. 3.2.7 VCC Short-Circuit
      8. 3.2.8 Thermal Performance
  9. 4Hardware Design Files
    1. 4.1 Assembly and Printed Circuit Board (PCB)
    2. 4.2 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Revision History

1.3.2 UCC33420-Q1 Pin Definition

Figure 1-1 UCC33420-Q1 Package (Top View)
Table 1-3 UCC33420-Q1 Pin Description
PIN TYPE(1) DESCRIPTION
NAME NO.
EN/FLT 1 I/O

Multi-functional enable input pin and output fault pin. Connect to microcontroller through an 18kΩ or greater pull-up resistor.

Enable input pin: Forcing EN low disables the device. Pull high to enable normal device functionality.

Fault output pin: This pin is pulled low for 200us to alert that power converter is shutdown due to a fault condition.
VINP 2 P Primary input supply voltage. Connect parallel 2.2nF 0402, and 10µF ceramic bypass capacitors close to VINP to GNDP pins.
GNDP 3, 4, 5, 6 G Power ground return connection for VINP.
SEL 7 I VCC selection pin. VCC setpoint is 5V when SEL is connected to VCC and 5.5V when SEL is shorted to GNDS.
VCC 8 P Isolated supply output voltage pin. Connect parallel 2.2nF 0402, and 22µF ceramic bypass capacitors close to VCC and GNDS pins.
GNDS 9, 10, 11, 12 G Power ground return connection for VCC.
(1) P=Power, G=Ground, I=Input, 0=Output