Components

2MHz Automotive Non-Synchronous Boost Controller

The NCV898032 from ON Semiconductor is an adjustable output non−synchronous boost controller which drives an external N−channel MOSFET. The device uses peak current mode control with internal slope compensation. The IC incorporates an internal regulator that supplies charge to the gate driver.

Protection features include internally−set soft−start, undervoltage lockout, cycle−by−cycle current limiting and thermal shutdown. Additional features include low quiescent current sleep mode and microprocessor compatible input pin.

Applications are expected to include various automotive systems such as: LED lighting, backlighting, headlamps; Start-stop systems; Boost, Flyback, SEPIC, Cuk Topologies; and Direct gas injection systems.

Simplified block diagram and application schematic (click on schematic to enlarge)

Features

  • Peak Current Mode Control with Internal Slope Compensation
  • 2 V [1]3% Reference Voltage for Constant Current Loads
  • 2 MHz Fixed Frequency Operation
  • Wide Input Voltage Range of 3.2 V to 40 V, 45 V Load Dump
  • Input Undervoltage Lockout (UVLO)
  • Internal Soft−Start
  • Low Quiescent Current in Sleep Mode (< 10 [1]A Typical)
  • Cycle−by−Cycle Current Limit Protection
  • Hiccup−Mode Overcurrent Protection (OCP)
  • Thermal Shutdown (TSD)
  • NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
  • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Benefits include:

  • LED PWM Dimming Capable
  • Accurate Current/Voltage Regulation
  • Facilitates Use of Lower Cost Magnetics and Filter Capacitors
  • Designed for Automotive Battery Operating Environment
  • Works in a Wide Variety of Applications
  • Disables Startup in Undervoltage Conditions
  • Very Low Off-State Current
  • Protects Against Overcurrent Conditions
  • Thermally Protects IC
ON Semiconductor
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