Click here to ask about the production status of specific part numbers. MAX17692A/MAX17692B 4.2V60V No-Opto Isolated Flyback Converter with Integrated FET General Description Benefits and Features Maxim s Rainier family of isolated power devices enable Reduces External Components and Total Cost cooler, smaller, and simpler power-supply solutions. The Eliminates the Optocoupler and Secondary-Side MAX17692A/B is a high efficiency no-opto integrated Error Amplifier nMOSFET flyback converter that uses fixed frequency Up to 20% Space Savings peak current mode control. The device senses the isolated 76V, Low R Integrated nMOSFET DSON output voltage directly from the primary-side flyback wave- Internal Loop Compensation (MAX17692A) form during the secondary-side rectifier conduction. No Built-In Soft-Start secondary-side error amplifier and optocoupler are re- Reduces Power Dissipation quired to provide an accurate, isolated, regulated output Delivers up to 3.5W Output Power voltage, saving up to 20% of PCB space normally required Frequency Fold-Back Enables Enhanced Light- for a traditional flyback converter. Load Efficiency The MAX17692A/B features a low R , 76V, 205m 2.5A Shutdown Current DSON integrated nMOSFET primary switch and is designed to Supports Key System-Level Design Requirements operate over a wide supply range from 4.2V to 60V. The Frequency Dithering Supports Low-EMI, Spread- switching frequency of the device is programmable from Spectrum Operation 100kHz to 350kHz. An EN/UVLO feature allows the user Switching Frequency Synchronization to External to turn ON/OFF the power converter precisely at the de- Clock sired input voltage. Input overvoltage protection can be Operates Reliably in Adverse Environments implemented using the OVI pin (MAX17692A only). Soft- Output Diode Forward Voltage Temperature start limits inrush current at startup. The MAX17692A/B Compensation supports external clock synchronization to avoid low-fre- Hiccup Current-Limit Protection quency beats on the input bus in systems with multiple Programmable EN/UVLO Threshold converters. The device also has programmable frequency Input Overvoltage (OVI) Protection (MAX17692A) dithering for low-EMI, spread-spectrum operation. Overtemperature Protection The MAX17692A/B allows temperature compensation for High Industrial -40C to +125C Ambient Operating variations in the output rectifier diode forward voltage Temperature Range/ -40C to +150C Junction drop. The MAX17692A is internally compensated for loop Temperature Range stability, while the MAX17692B offers external loop com- pensation flexibility. The MAX17692A/B has robust hic- Ordering Information appears at end of data sheet. cup-protection and thermal protection schemes, and is available in a space-saving 12-pin, 3mm x 3mm TDFN package with a temperature range from -40C to +125C. Applications Isolated Power Supplies PLC I/O Modules IGBT Gate Drive Supplies Industrial and Telecom Applications 19-100948 Rev 0 12/20MAX17692A/MAX17692B 4.2V60V No-Opto Isolated Flyback Converter with Integrated FET Typical Application Circuit 19V TO 30V 3:1, 55H 5V, 0.7A D OUT Z VIN 30V 4.7F 100F EN/UVLO D S OVI FB MAX17692AMAX17692A 160k SS LX 68nF TC/VCM RT SET SYNC/ V 68.1k 2.2F CC 10k GND DITHER www.maximintegrated.com Maxim Integrated 2