UCC28730-Q1 Zero-Power Standby PSR Flyback Controller for Automotive | TI.com

UCC28730-Q1 (ACTIVE) Zero-Power Standby PSR Flyback Controller for Automotive

 

Description

The UCC28730-Q1 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.

An internal 700-V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time or output transient response. Control algorithms in the UCC28730-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.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: -40⁰C to +125⁰C
    • Device HBM Classification Level 2: ±2 kV
    • Device CDM Classification Level C4B: ±750 V
  • Enables Zero-Power (< 5 mW) Standby Consumption
  • Primary-Side Regulation (PSR) Eliminates Opto-coupler
  • ±5% Voltage Regulation and Current Regulation Across Line and Load
  • 700-V Start-up Switch
  • 83-kHz Maximum Switching Frequency Enables Low Stand-by Power Charger Designs
  • Resonant-Ring Valley-Switching Operation for Highest 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

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WEBENCH® Designer UCC28730-Q1

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 85.00 to 480.00V
Vout  V 3.3 to 22V
Iout  A ≤ 10A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Control method Duty cycle (Max) (%) Frequency (Max) (kHz) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Rating Package size: mm2:W x L (PKG)
UCC28730-Q1 Order now Primary-side regulation     99     83     21/7     PSR
DCM
HV Start-up
Low Power
Light Load Efficiency
Current Limiting
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
-40 to 125     SOIC | 7     Automotive     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28700-Q1 Order now Primary-side regulation     99     132     21/8     PSR
DCM
Low Power
Light Load Efficiency
Error Amplifier
Current Limiting
Green Mode
Input Line Monitor
Leading Edge Blanking    
-40 to 125     SOT-23 | 6     Automotive     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)