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reference designMAX17595 | Demoboard MAXREFDES1037

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

More information

Products

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IR(A)
L(mH)
RDC max.(Ω)
VR(V (AC))
VT(V (AC))
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W(mm)
H(mm)
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Samples
7448640401
WE-FC Common Mode Power Line Choke, 0.9 A, 9.4 mH
Simu­lation
Downloads10 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-FC Common Mode Power Line Choke
Rated Current0.9 A
Inductance9.4 mH
DC Resistance0.55 Ω
Rated Voltage250 V (AC)
Insulation Test Voltage2000 V (AC)
MaterialMnZn 
Length21.3 mm
Width21.3 mm
Height17.8 mm
MountTHT 
750317114
Transformer, –, 0.097 mH
Simu­lation
Downloads4 files

CAD files ZIP

Electric models ZIP

Others ZIP

Download all 4 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product series Transformer
–
Inductance0.097 mH
–
–
Insulation Test Voltage2800 V (AC)
–
Length27.95 mm
Width20.32 mm
Height28.58 mm
MountTHT