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Zero-Power Standby PSR Flyback Controller for Automotive


Package | PIN: D | 7
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $1.48
10-24 $1.32
25-99 $1.23
100-249 $1.05
250-499 $0.97
500-749 $0.79
750-999 $0.63
1000+ $0.56


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: -40⁰C to+125⁰C
    • Device HBM Classification Level 2: ±2kV
    • 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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Texas Instruments  UCC28730QDRQ1

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 minimumswitching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This deviceprocesses information from the primary power switch and an auxiliary flyback winding for precisecontrol of output voltage and current.

An internal 700-V start-up switch, dynamically- controlled operating states and atailored modulation profile support ultra-low stand-by power without sacrificing start-up time oroutput transient response. Control algorithms in the UCC28730-Q1 allow operating efficiencies tomeet or exceed applicable standards. Discontinuous conduction mode (DCM) operation withvalley-switching reduces switching losses. Modulation of the switching frequency and primarycurrent peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load andline ranges.