SNOT034 April   2024 TLV1805 , TLV1805-Q1 , TLV1811 , TLV1811-Q1

 

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GUID-20240301-SS0I-HLWT-QVNL-PRJ5TKFVF6JP-low.svgConcept Circuit for Pilot Signal Generator

See more about this use case in the Reference Design TIDA-010239 AC Level 2 Charger Platform.

Design Challenges

  • Split supply needed to accommodate ±12V output signal to meet SAE J1772 standard
    • 0 to +3.3V input logic to bipolar ±12V output level translation
  • Minimum of ±12mA sinking and sourcing current
  • Rise time and fall time < 2μs per SAE J1772 Specifications

How High-Voltage Comparators benefit the system

  • Wide operating voltage of up to 40V (±20V) and rail-to-rail input
  • Rise and Fall times (<20ns) well exceed required specification
  • Output current exceeds ±12mA sinking and sourcing current
  • Push-Pull output eliminates need for pull-up resistor for simplicity and to maintain equal rise and fall times
  • Propagation Delay well below minimum requirements to maintain PWM accuracy
  • Small single-channel packages minimize pilot circuit footprint
  • Automotive qualified AEC-Q100 (Q1) variants available if required
Part Number Voltage Range Output Type Rise and Fall Time Supply Current Propagation Delay Package
TLV1811 2.4V to 40V (±1.2 to ±20V) Push-Pull 15ns 8µA 450ns SOT-23-5, SC-70-5
TLV1805 3.3V to 40V (±1.65V to ±20V) Push-Pull w/Shutdown 18ns 135µA 250ns SOT-23-6