MAX17691B
PRODUCTION4.2V–60V No-Opto Isolated Flyback Converter with Integrated FET
Reduce Solution Size and Component Count by Up to 30%
- Part Models
- 2
- 1ku List Price
- Starting From $2.52
Overview
- Reduces External Components and Total Cost
- Eliminates the Optocoupler and Secondary-Side Error Amplifier
- Up to 20% Space Savings
- 76V, Low RDSON Integrated nMOSFET
- Internal Loop Compensation (MAX17691A)
- Built-In Soft-Start
- Reduces Power Dissipation
- > 90% Efficiency
- Delivers up to 7.5W Output Power
- Frequency Fold-Back Enables Enhanced Light-Load Efficiency
- 2.5µA Shutdown Current
- Supports Key System-Level Design Requirements
- Frequency Dithering Supports Low-EMI, Spread-Spectrum Operation
- Switching Frequency Synchronization to External Clock
- Compliant with CISPR22 ClassB EMI Requirements
- Operates Reliably in Adverse Environments
- Output Diode Forward Voltage Temperature Compensation
- Hiccup Current-Limit Protection
- Programmable EN/UVLO Threshold
- Input Overvoltage (OVI) Protection (MAX17691A)
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range
Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17691A/B is a high efficiency No-Opto integrated nMOSFET flyback converter that uses fixed frequency peak current mode control. The device senses the isolated output voltage directly from the primary-side flyback waveform during secondary-side rectifier conduction. No secondary- side error amplifier and optocoupler are required to provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.
The MAX17691A/B features a low RDSON, 76V, 170mΩ integrated nMOSFET primary switch and is designed to operate over a wide supply range from 4.2V to 60V. The switching frequency of the device is programmable from 100kHz to 350kHz. An EN/UVLO feature allows the user to turn ON/OFF the power converter precisely at the desired input voltage. Input overvoltage protection can be implemented using the OVI pin (MAX17691A only). Softstart limits inrush current at startup. The MAX17691A/B supports external clock synchronization to avoid low-frequency “beats” on the input bus in systems with multiple converters. The device also has programmable frequency dithering for low-EMI, spread-spectrum operation. The MAX17691A/B allows temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17691A is internally compensated for loop stability, while the MAX17691B offers external loop compensation flexibility. The MAX17691A/B has robust hiccup- protection and thermal protection schemes, and is available in a space-saving 12-pin, 3mm x 3mm TDFN package with a temperature range from -40°C to +125°C.Applications
- Isolated Power Supplies
- PLC I/O Modules
- IGBT Gate Drive Supplies
- Industrial and Telecom Applications
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX17691BATC+ | Thin Dual Flatpack No Leads | ||
| MAX17691BATC+T | Thin Dual Flatpack No Leads |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 27, 2024 - 2400 ASSEMBLY |
||
| MAX17691BATC+ | PRODUCTION | |
| MAX17691BATC+T | PRODUCTION | |
Software Resources
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SIMPLIS Models 1
Evaluation Kits
Evaluation Kit for the MAX17691A in 5V Output-Voltage Application
Resources
Evaluation Kit for the MAX17691B 5V Output-Voltage Application
Resources
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