Analog Devices Inc./Maxim Integrated MAX17690EVKITC#

Overview

MAX17690EVKITC# from Maxim Integrated is an evaluation kit for the MAX17690 peak-current-mode, no-optocoupler isolated flyback controller IC. It supports 4.5V–60V input, 50kHz–250kHz programmable switching frequency, 2A/4A gate drive, and primary-side output voltage regulation without auxiliary winding or optocoupler - enabling compact, low-BOM isolated DC-DC designs for industrial power supplies.

For engineers reviewing the MAX17690EVKITC# datasheet, MAX17690EVKITC# pinout, MAX17690EVKITC# application, or MAX17690EVKITC# equivalent, this kit provides validated reference design, layout, bill-of-materials, and test points to accelerate development of ±5% regulated, DCM-mode flyback converters targeting PLC I/O modules, telecom power, and wide-input industrial systems.

Technical Context

The MAX17690EVKITC# implements a complete isolated flyback reference design using the MAX17690 controller in a 16-pin 3mm × 3mm TQFN package. It demonstrates primary-side sensing via FB and SET pins, temperature-compensated regulation using TC and RTC, and robust hiccup-mode short-circuit protection triggered at 120mV CS threshold with 16,384-cycle timeout.

Key operational parameters include EN/UVLO turn-on at 1.215V (typ), OVI overvoltage trip at 1.215V (typ), INTVCC LDO regulated to 7V (typ) with 26–60mA current limit, and NDRV driver with 2A source / 4A sink capability and sub-20ns rise/fall times into 3.3nF load - all verified across –40°C to +125°C junction temperature range.

Key Specifications

Availability

MAX17690EVKITC# is available at Aetrix Electronics and suitable for industrial power supply validation, telecom DC-DC qualification, and PLC I/O module prototyping requiring stable component supply and production-ready reference design fidelity.

Supply support for MAX17690EVKITC# includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The MAX17690 product line delivers isolated flyback control with primary-side regulation - designed specifically to eliminate optocouplers and auxiliary windings while maintaining ±5% output accuracy across –40°C to +125°C for space-constrained, cost-sensitive industrial power systems.

FAQ

What is the purpose of the MAX17690EVKITC# evaluation kit?

The MAX17690EVKITC# is a fully assembled and tested evaluation platform for the MAX17690 no-optocoupler isolated flyback controller. It enables engineers to validate performance, measure efficiency, verify regulation accuracy, and adapt the reference design for custom 5V/1A isolated power supplies - eliminating the need to build first-pass hardware from scratch.

Does the MAX17690EVKITC# support input overvoltage protection?

Yes, the MAX17690EVKITC# implements input overvoltage protection via the OVI pin. With ROVI = 10kΩ and appropriate resistor divider, it triggers shutdown when input voltage exceeds the programmed threshold (typically 1.215V at OVI), resuming operation only after the OVI voltage falls below 1.1V - protecting downstream components during transient overvoltage events.

Can the MAX17690EVKITC# be used to evaluate temperature compensation?

Yes, the MAX17690EVKITC# includes RTC = 27.4kΩ connected to the TC pin, enabling active temperature compensation of the output diode forward voltage drop. This maintains ±5% output regulation across –40°C to +125°C by injecting a PTAT current that counteracts the diode's negative temperature coefficient.

What is the soft-start behavior demonstrated by the MAX17690EVKITC#?

The MAX17690EVKITC# uses CSS = 47nF on the SS pin, providing ≈470ms soft-start time (tSS = 5 × CSS). During startup, the internal 5µA current source ramps the SS voltage, which modulates the error amplifier reference to limit inrush current and ensure monotonic 5V output rise - preventing overshoot and stress on output capacitors and rectifiers.

How does the MAX17690EVKITC# achieve no-optocoupler regulation?

The MAX17690EVKITC# achieves no-optocoupler regulation by sampling the reflected flyback voltage at the FB pin during the MOSFET off-time, then using the SET pin voltage - proportional to output voltage plus diode drop - as the feedback signal. The internal algorithm samples near zero secondary current to minimize parasitic effects, delivering ±5% regulation without auxiliary winding or optocoupler.