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Administración de potencia
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Controladores de CA/CC

UCC28731-Q1

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Controlador de retorno PSR de potencia en espera cero para automoción

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UCC28731-Q1

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Detalles del producto

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 mm × 6 mm)
  • 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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* Hoja de datos UCC28731-Q1 Zero-Power Standby PSR Flyback Controller for Automotive datasheet (Rev. A) PDF | HTML 12/11/2024

Diseño y desarrollo

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Placa de evaluación

UCC28730EVM-552 — Controlador de retorno de lado primario UCC28730 con activación de lado secundario UCC24650

El módulo de evaluación UCC28730EVM-552 es un convertidor de retorno en modo discontinuo (DCM) fuera de línea de 10 W que proporciona regulación de salida de tensión constante (CV) y corriente constante (CC) sin el uso de un acoplador óptico. El controlador del lado principal detecta una señal de (...)

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