Analog Devices MAX17595 | Demoboard MAXREFDES1249

Description

The MAX17595/MAX17596/MAX17597 is a family of peak-current-mode controllers for design of wide input-voltage flyback and boost regulators. The MAX17595 offers optimized input thresholds for universal input AC-DC converters and telecom DC-DC (36V to 72V input range) power supplies. The MAX17596/MAX17597 offer input thresholds suitable for low-voltage DC-DC applications (4.5V to 36V). The MAX17597 implements a boost converter. All three controllers contain a built-in gate driver for external n-channel MOSFETs. The MAX17595/MAX17596/MAX17597 house 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/MAX17596/MAX17597 family 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 ensuree 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/Non-Isolated 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—MAX17595
• DC-DC (4.5V to 36V) Flyback Controller—MAX17596
• Nonsynchronous (4.5V to 36V) Boost PWM Controller—MAX17597
• 3mm x 3mm TQFN Package
• 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

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

More information

• Datasheet
• IC product information