JAJSMY4 September   2021 UCC14240-Q1

ADVANCE INFORMATION  

  1. 特長
  2. アプリケーション
  3. 概要
  4. Revision History
  5. Pin Configuration and Functions
  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 Power Ratings
    6. 6.6 Insulation Specifications
    7. 6.7 Electrical Characteristics
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Stage Operation
      2. 7.3.2 Digital I/O ENA and /PG
      3. 7.3.3 Power-Up and Power-Down Sequencing
    4. 7.4 Device Functional Modes
  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
        1. 8.2.2.1 RLIM Resistor Selection
        2. 8.2.2.2 Capacitor Selection
    3. 8.3 System Examples
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 サポート・リソース
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ(パッケージ|ピン)
  • DWN|36
サーマルパッド・メカニカル・データ
発注情報

Pin Configuration and Functions



Figure 5-1 DWN Package, 36-Pin SSOP (Top View)
Table 5-1 Pin Functions
PINTYPE (1)DESCRIPTION
NAMENO.
GNDP1, 2, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18GPrimary-side ground connection for VIN. Place several vias to copper pours for thermal relief. See Layout Guidelines.
/PG3O

Active low powergood open-drain output pin. /PG pulled low when (UVLO ≤ VIN ≤ OVLO); (UVP1 ≤ (VDD – VEE) ≤ OVP1); (UVP2 ≤ (COM – VEE) ≤ OVP2); TJ_Primary ≤ TSHUT_primary; and TJ_secondary ≤ TSHUT_secondary

ENA4IEnable pin. Forcing ENA LOW disables the device. Pull HIGH to enable normal device functionality. 5.5-V recommended maximum.
VIN6, 7PPrimary input voltage. Connect a 2.2-µF ceramic capacitor from VIN to GNDP. Connect a 0.1-µF high-frequency bypass ceramic capacitor close the pins.
VEE19, 20, 21, 22, 23, 24, 25,26, 27, 30,31, 36G

Secondary-side reference connection for VDD and COM. The VEE pins are used for the high current return paths.

VDD28, 29PSecondary-side isolated output voltage from transformer. Connect a 2.2-µF and a parallel 0.1-µF ceramic capacitor from VDD to VEE. The 0.1-µF ceramic capacitor is the high frequency bypass and must be next to the IC pins.
RLIM32PSecondary-side second isolated output voltage resistor to limit the source current from VDD to COM node, and the sink current from COM to VEE. Connect a resistor from RLIM to COM to regulate the (COM – VEE) voltage. See Section 8.2.2.1 for more detail.
FBVEE33IFeedback (COM – VEE) output voltage sense pin used to adjust the output (COM – VEE) voltage. Connect a resistor divider from COM to VEE so that the midpoint is connected to FBVEE, and the equivalent FBVEE voltage when regulating is 2.5 V. Add a 100-pF to 330-pF ceramic capacitor for high frequency decoupling in parallel with the low-side feedback resistor. The 0.1-µF ceramic capacitor for high frequency bypass must be next to the FBVEE and VEEA IC pins on top layer or back layer connected with vias.
FBVDD34IFeedback (VDD – VEE) output voltage sense pin and to adjust the output (VDD – VEE) voltage. Connect a resistor divider from VDD to VEE so that the midpoint is connected to FBVDD, and the equivalent FBVDD voltage when regulating is 2.5 V. Add a 100-pF to 330-pF ceramic capacitor for high frequency decoupling in parallel with the low-side feedback resistor. The 0.1-µF ceramic capacitor for high frequency bypass must be next to the FBVDD and VEEA IC pins on top layer or back layer connected with vias.
VEEA35GSecondary-side analog sense reference connection for the noise sensitive analog feedback inputs, FBVDD and FBVEE. Connect the low-side feedback resistors and high frequency decoupling filter capacitor close to the VEEA pin and respective feedback pin FBVDD or FBVEE. Connect to secondary-side gate drive lowest voltage reference, VEE. Use a single point connection and place the high frequency decoupling ceramic capacitor close to the VEEA pin. See Layout Guidelines.
P = power, G = ground, I = input, O = output