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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Parametrics Compare all products in Flyback controllers

 
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 UCC28700-Q1
Current     Current    
99     99    
83     132    
21/7     21/8    
PSR
DCM
HV Start-up
Low Power
Light Load Efficiency
Current Limiting
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
PSR
DCM
Low Power
Light Load Efficiency
Error Amplifier
Current Limiting
Green Mode
Input Line Monitor
Leading Edge Blanking    
-40 to 125     -40 to 125    
SOIC | 7     SOT-23 | 6    
Automotive     Automotive    
7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)     6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    

Design tool

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