JAJSR40 august   2023 UCC15241-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 Safety Limiting Values
  9. 8 Safety-Related Certifications
  10. 9 Insulation Characteristics
  11. 10Typical Characteristics
  12. 11Detailed Description
    1. 11.1 Overview
    2. 11.2 Functional Block Diagram
    3. 11.3 Feature Description
      1. 11.3.1 Power Stage Operation
        1. 11.3.1.1 VDD-VEE Voltage Regulation
        2. 11.3.1.2 COM-VEE Voltage Regulation
        3. 11.3.1.3 Power Handling Capability
      2. 11.3.2 Output Voltage Soft Start
      3. 11.3.3 ENA and PG
      4. 11.3.4 Protection Functions
        1. 11.3.4.1 Input Undervoltage Lockout
        2. 11.3.4.2 Input Overvoltage Lockout
        3. 11.3.4.3 Output Undervoltage Protection
        4. 11.3.4.4 Output Overvoltage Protection
        5. 11.3.4.5 Overpower Protection
        6. 11.3.4.6 Overtemperature Protection
    4. 11.4 Device Functional Modes
  13. 12Application and Implementation
    1. 12.1 Application Information
    2. 12.2 Typical Application
      1. 12.2.1 Design Requirements
      2. 12.2.2 Detailed Design Procedure
        1. 12.2.2.1 Capacitor Selection
        2. 12.2.2.2 Single RLIM Resistor Selection
        3. 12.2.2.3 RDR Circuit Component Selection
        4. 12.2.2.4 Feedback Resistors Selection
      3. 12.2.3 Application Curves
    3. 12.3 System Examples
    4. 12.4 Power Supply Recommendations
    5. 12.5 Layout
      1. 12.5.1 Layout Guidelines
      2. 12.5.2 Layout Example
  14. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 サポート・リソース
    4. 13.4 Trademarks
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 用語集
  15. 14Mechanical, Packaging, and Orderable Information
  16. 15Tape and Reel Information

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

11.4 Device Functional Modes

Depending on the input and output conditions, ENA pin voltage, as well as the device temperature, the UCC15241-Q1 operates in one of the below operation modes.

  1. Disable mode. In this mode, the module is off, but waiting for ENA pin becoming high to start operate.
  2. Soft-start mode. In this mode, the module starts to deliver power to the secondary side. The primary-side operation duty cycle and secondary-side references are raised gradually to reduce the stress to the module.
  3. Normal operation mode. In this mode, the module operates normally, delivers power to the secondary side.
  4. Protection mode, auto-recovery. In this mode, the module is off, due to the input UVLO or OVLO protection. After the input voltage fault is cleared, depending on the ENA pin voltage condition, it either becomes disabled mode if the ENA pin voltage is low, or it goes through soft-start mode to the normal operation mode.
  5. Protection mode, latched-off. In this mode, the module is off, due to other protections. The module remains off even the fault causing the protection is cleared. Recycling VVIN operation must ensure the input voltage goes below the analog UVLO falling threshold (VVIN_ ANALOG_UVLOP_FALLING ) first to reset the latch-off state, or the ENA pin is toggled Low (OFF) then High (ON).

Table 11-1 lists the supply functional modes for this device. The ENA pin has an internal weak pull-down resistance to ground, but TI does not recommend leaving this pin open.

Table 11-1 Device Functional Modes

INPUT

OUTPUTS

 Operation Mode
VVIN ENA FAULT V(VDD – VEE)
Isolated Output1		 V(COM – VEE)
Isolated Output2		 PG Open Drain
VVIN < VVIN_UVLOP_RISING X X OFF OFF High Protection mode, auto-recovery
VVIN_UVLOP_RISING < VVIN < VVIN_OVLO_RISING LOW X OFF OFF High Disable mode
VVIN_UVLOP_RISING < VVIN < VVIN_OVLO_RISING HIGH NO FAULT Regulating at Setpoint Regulating at Setpoint Low Normal operation
VVIN_UVLOP_RISING < VVIN < VVIN_OVLO_RISING HIGH YES FAULT OFF OFF High Protection mode, latched-off
VVIN > VVIN_OVLO_RISING X X OFF OFF High Protection mode, auto-recovery