Create a design and simulate using EE-Sim tools: MAX17690ATE+
The MAX17690ATE+ is a peak current mode, fixed-frequency switching controller specifically designed for the isolated flyback topology operating in Discontinuous Conduction Mode (DCM). The device senses the isolated output voltage directly from the primary-side flyback waveform during the off-time of the primary switch. No auxiliary winding or optocoupler is required for output voltage regulation.
The MAX17690ATE+ is designed to operate over a wide supply range from 4.5V to 60V. The switching frequency is programmable from 50kHz to 250kHz. A EN/UVLO pin allows the user to turn on/off the power supply precisely at the desired input voltage. The MAX17690ATE+ provides an input overvoltage protection through the OVI pin. The 7V internal LDO output of the MAX17690ATE+ makes it suitable for switching both logic-level and standard MOSFETs used in flyback converters. With 2A/4A source/sink currents, the MAX17690ATE+ is ideal for driving low RDS(ON) power MOSFETs with fast gate transition times. The MAX17690ATE+ provides an adjustable soft-start feature to limit the inrush current during startup.
The MAX17690ATE+ provides temperature compensation for the output diode forward voltage drop. The MAX17690ATE+ has robust hiccup-protection and thermal protection schemes, and is available in a space-saving 16-pin 3mm x 3mm TQFN package with a temperature range from -40°C to 125°C.
Get Started with No-Opto Flyback Technology and the MAX17690
Feature
- 4.5V to 60V Input Voltage Range
- No Optocoupler or Third Winding Required to Derive Feedback Signal Across Isolation Boundary
- 2A/4A Peak Source/Sink Gate Drive Currents
- 50kHz to 250kHz Programmable Switching Frequency
- Input EN/UVLO Feature
- Input Overvoltage Protection
- Programmable Soft-Start
- Hiccup-Mode Short-Circuit Protection
- Thermal Shutdown Protection
- -40°C to 125°C Operating Temperature Range
- Space-Saving, 16-Pin 3 x 3 TQFN Package
- AEC-Q100 Automotive Version Available
Applications
- Industrial and Telecom Applications
- Isolated Flyback Converters
- PLC I/O Modules
- Wide-Range DC-Input Isolated Power Supplies
