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Analog Devices MAX17595 | Demoboard MAXREFDES1037

72W Offline Flyback Converter Using the MAX17595

Overview

TopologyFlyback Converter
Input voltage103-128 V
Switching frequency100-1000 kHz
Output 124 V / 3 A

Description

The MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulators. The MAX17595 offers optimized input thresholds for universal input AC-DC converters and telecom DC-DC (36V to 72V input range) power supplies. It contains a built-in gate driver for an external n-channel MOSFET. The MAX17595 houses an internal error amplifier with 1% accurate reference, eliminating the need for an external reference. The switching frequency is programmable from 100kHz to 1MHz with an accuracy of 8%, allowing optimization of magnetic and filter components, resulting in compact and cost-effective power conversion. For EMI-sensitive applications, the MAX17595 incorporates a programmable frequency dithering scheme, enabling low-EMI spread-spectrum operation. Users can start the power supply precisely at the desired input voltage, implement input overvoltage protection, and program soft-start time. A programmable slope compensation scheme is provided to ensure stability of the peak current-mode control scheme. Hiccup-mode overcurrent protection and thermal shutdown are provided to minimize dissipation in overcurrent and overtemperature fault conditions.

Features

  • Programmable Switching Frequency Allows Optimization of the Magnetic and Filter Components, Resulting in Compact, Cost-Effective, Efficient Isolated/ Nonisolated Power Supplies
  • 100kHz to 1MHz Programmable Switching Frequency with Optional Synchronization
  • Peak Current Mode Control Provides Excellent Transient Response—Offline (Universal Input AC) and Telecom (36V to 72V) Flyback Controller
  • Programmable Frequency Dithering Enables Low EMI Spread-Spectrum Operation
  • Integrated Protection Features Enhance System Reliability
  • Adjustable Current Limit with External Current Sense Resistor
  • Fast Cycle-By-Cycle Peak Current Limiting Hiccup-Mode Short-Circuit Protection
  • Overtemperature Protection
  • Programmable Soft-Start and Slope Compensation
  • Input Overvoltage Protection

Typical applications

  • Battery-Powered Applications, Wide-Range DC-Input Flyback/Boost Battery Chargers
  • Industrial and Telecom Applications
  • Universal Input Offline AC-DC Power Supplies

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesIR
(A)
L
(mH)
RDC max.
(Ω)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
Mount Samples
7448640401SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-FC Common Mode Power Line Choke 0.9 9.4 0.55 250 2000 MnZn 21.3 21.3 17.8 THT
750317114SPEC
4 files Active i| Production is active. Expected lifetime: >10 years. Transformer 0.097 2800 27.95 20.32 28.58 THT
Order Code Data­sheet Simu­lation
7448640401SPEC
750317114SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesIR
(A)
L
(mH)
RDC max.
(Ω)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
Mount Samples