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Home » NEWEST Products » New by Manufacturer » Maxim Integrated » Maxim MAX17598/99 Current-Mode PWM Controllers
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Maxim MAX17598/99 Current-Mode PWM Controllers

Maxim MAX17598/99 Current-Mode PWM Controllers

Maxim Integrated MAX17598 / MAX17599 low IQ, active clamp current-mode PWM controllers contain all the control circuitry required for the design of wide-input isolated/nonisolated forward-converter industrial power supplies. MAX17598 is designed for universal input (rectified 85V AC to 265V AC) or telecom (-36V DC to -72V DC) power supplies. MAX17599 is optimized for low-voltage industrial supplies (4.5V DC to 30V DC). These Maxim Integrated devices include an AUX driver that drives an auxiliary MOSFET (clamp switch) that helps implement the active-clamp transformer reset topology for forward converters. Such a reset topology has several advantages, including reduced voltage stress on the switches, transformer size reduction due to larger allowable flux swing, and improved efficiency due to elimination of dissipative snubber circuitry. Programmable dead time between the AUX and main driver allows for zero voltage switching (ZVS).

Features
  • Active-Clamp Peak-Current-Mode Forward PWM Controller
  • 20µA Startup Current in UVLO
  • Programmable Input Undervoltage Lockout
  • Programmable Input Overvoltage Protection
  • Programmable 100kHz to 1MHz Switching Frequency
  • Switching Frequency Synchronization Up to 1.2MHz
  • Programmable Frequency Dithering for Low EMI Spread-Spectrum Operation
  • Programmable Dead Time
  • Adjustable Soft-Start
  • Programmable Slope Compensation
  • Fast Cycle-by-Cycle Peak-Current-Limit 40ns Typical Propagation Delay
  • 70ns Internal Leading-Edge Current-Sense Blanking
  • Hiccup-Mode-Output Short-Circuit Protection
  • Soft-Stop for Well-Controlled Clamp Capacitor Discharge
  • Negative Current Limit to Limit Clamp-Switch Clamp Capacitor and Transformer Reverse Current
Applications
  • Industrial Power Supplies
  • Isolated Battery Chargers
  • Servers and Embedded Computing
  • Telecom and Datacom Power Supplies
Part Number VIN (V) min VIN (V) max
MAX17598 8 1000
MAX17599 4.5 36

Block Diagram

Block Diagram
  • Maxim Integrated
  • Semiconductors|Integrated Circuits|IC-Power Management