General Description

The MAX15004A/B/MAX15005A/B high-performance, current-mode PWM controllers operate at an automotive input voltage range from 4.5V to 40V (load dump). The input voltage can go lower than 4.5V after startup if IN is bootstrapped to a boosted output voltage. The controllers integrate all the building blocks necessary for implementing fixed-frequency isolated/nonisolated power supplies. The general-purpose boost, flyback, forward, and SEPIC converters can be designed with ease around the MAX15004/MAX15005.

Benefts and Features

● Wide Supply Voltage Range Meets Automotive

   Power-Supply Operating Requirement Including

   “Cold Crank” Conditions

   • 4.5V to 40V Operating Input Voltage Range

      (Can Operate at Lower Voltage After Startup if

      Input is Bootstrapped to a Boosted Output)

● Control Architecture Offers Excellent Performance

   While Simplifying the Design

   • Current-Mode Control

   • 300mV, 5 Accurate Current-Limit Threshold

      Voltage

   • Programmable Slope Compensation

   • 50 (MAX15004) or Adjustable (MAX15005)

      Maximum Duty Cycle

● Accurate, Adjustable Switching Frequency and

   Synchronization Avoids Interference with Sensitive Radio Bands

   • Switching Frequency Adjustable from 15kHz to

      500kHz (1MHz for the MAX15005A/B)

   • RC Programmable 4 Accurate Switching

      Frequency

   • External Frequency Synchronization

● Built-In Protection Capability for Improved System Reliability

   • Cycle-by-Cycle and Hiccup Current-Limit Protection

   • Overvoltage and Thermal-Shutdown Protection

   • -40°C to +125°C Automotive Temperature Range

   • AEC-Q100 Qualified

Applications

● Automotive

● Vacuum Fluorescent Display (VFD) Power Supply

● Isolated Flyback, Forward, Nonisolated SEPIC, Boost Converters