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UCC28731-Q1

現行

車用零功耗待機 PSR 返馳控制器

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產品規格表

UCC28731-Q1

現行
產品規格表 立即訂購

產品詳細資料

Topology Buck, Flyback Control mode Primary-side regulation Features Current limiting, DCM, Green mode, High-voltage startup, Input line monitor, Leading edge blanking, Light load efficiency, Low power, Overcurrent protection, Overtemperature protection, Primary-side regulated, Quasi-Resonant, Soft start, Thermal shutdown, Valley switching
Topology Buck, Flyback Control mode Primary-side regulation Features Current limiting, DCM, Green mode, High-voltage startup, Input line monitor, Leading edge blanking, Light load efficiency, Low power, Overcurrent protection, Overtemperature protection, Primary-side regulated, Quasi-Resonant, Soft start, Thermal shutdown, Valley switching
SOIC (D) 7 29.4 mm² 4.9 x 6
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40⁰C to +125⁰C
    • Device HBM classification Level 2: ±2kV
    • Device CDM classification Level C4B: ±750V
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Enables zero-power (< 5mW) standby consumption
  • Primary-side regulation (PSR) eliminates optical coupler
  • ±5% voltage regulation and current regulation across line and load
  • 700V start-up switch with 30V minimum start-up voltage
  • 83kHz maximum switching frequency enables low stand-by power charger designs
  • Resonant-ring valley-switching operation for improved overall efficiency
  • Frequency-dither to ease EMI compliance
  • Clamped gate-drive output for MOSFET
  • Over-voltage, low-line, and over-current protection functions
  • Programmable cable compensation
  • SOIC-7 package
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40⁰C to +125⁰C
    • Device HBM classification Level 2: ±2kV
    • Device CDM classification Level C4B: ±750V
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Enables zero-power (< 5mW) standby consumption
  • Primary-side regulation (PSR) eliminates optical coupler
  • ±5% voltage regulation and current regulation across line and load
  • 700V start-up switch with 30V minimum start-up voltage
  • 83kHz maximum switching frequency enables low stand-by power charger designs
  • Resonant-ring valley-switching operation for improved overall efficiency
  • Frequency-dither to ease EMI compliance
  • Clamped gate-drive output for MOSFET
  • Over-voltage, low-line, and over-current protection functions
  • Programmable cable compensation
  • SOIC-7 package

The UCC28731-Q1 isolated-flyback power supply controller provides constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler minimizing board area plus BOM count for higher lifetime reliability. This device processes information from the primary power switch and an auxiliary flyback winding for precise regulation of output voltage and current, hence the label "PSR".

A minimum switching frequency of 32Hz facilitates achieving less than 5mW of no-load power. An internal 700V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time. Control algorithms in the UCC28731-Q1 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The UCC28731-Q1 isolated-flyback power supply controller provides constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler minimizing board area plus BOM count for higher lifetime reliability. This device processes information from the primary power switch and an auxiliary flyback winding for precise regulation of output voltage and current, hence the label "PSR".

A minimum switching frequency of 32Hz facilitates achieving less than 5mW of no-load power. An internal 700V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time. Control algorithms in the UCC28731-Q1 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
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* Data sheet UCC28731-Q1 Zero-Power Standby PSR Flyback Controller for Automotive datasheet (Rev. A) PDF | HTML 2024年 11月 12日

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開發板

UCC28730EVM-552 — 具有 UCC24650 次級側邊喚醒的 UCC28730 初級側返馳控制器

UCC28730EVM-552 評估模組是 10W 離線不連續模式 (DCM) 返馳式轉換器，可提供定電壓 (CV) 和定電流 (CC) 輸出穩壓，無需使用光學耦合器。  一次側控制器會偵測二次側壓降監測器   UCC24650 的喚醒訊號，以改善對大負載步進的暫態嚮應。  EVM 展示 UCC28730 如何能以內部 700V 啟動開關，動態控制操作狀態及經過特殊調製的調變曲線，無需犧牲啟動時間或輸出暫態嚮應。

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