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MAXREFDES1141: 2.4W DC-DC Flyback Converter Using the MAX17596

MAXREFDES1141

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Description

The MAX17596 is a peak-current-mode controller for designing wide input-voltage flyback regulators. The device offers input thresholds suitable for low-voltage DC-DC applications (4.5V to 36V) and contains a built-in gate driver for an external n-channel MOSFET. The MAX17596 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 MAX17596 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
  • 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
  • Overtemperature Protection
  • Programmable Soft-Start and Slope Compensation
  • Input Overvoltage Protection

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Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.

 

Schematic

PCB Layout

Test Results

Parametrics

Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 19 29 0.1 - 24 2.4 Isolated Flyback

Parametrics

Input Type DC
Vin(Min) 19
Vin(Max) 29
Iout(Max) 0.1
Single/Multiple Output -
Vout(V) 24
Pout(W) 2.4
Isolated/Non-Isolated Isolated
Topology Flyback

Maxim Devices (1)

Part Number Name Product Family Order Design kits and evaluation modules
MAX17596 Peak-Current-Mode Controllers for Flyback and Boost Regulators Isolated Power Buy Now Design Kits

Maxim Devices (1)

Part Number Product Family
Isolated Power
Peak-Current-Mode Controllers for Flyback and Boost Regulators

Design Files (4)

Title Type Size Date
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 462KB 2019-07-09
maxrefdes1141-bom PDF 103KB 2019-07-09
maxrefdes1141-schematic PDF 19KB 2019-07-09
maxrefdes1141-pcb PDF 1MB 2019-07-09
Date Type
2019-07-09

TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 462KB)

2019-07-09

maxrefdes1141-bom

(PDF, 103KB)

2019-07-09

maxrefdes1141-schematic

(PDF, 19KB)

2019-07-09

maxrefdes1141-pcb

(PDF, 1MB)

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