ISL6840IUZ

Power Supply Controllers, Monitors Overview

The ISL6840IUZ is a single-channel, adjustable frequency Pulse-Width Modulation (PWM) controller designed for flyback and forward converter applications. It utilizes an advanced BiCMOS process to achieve low power consumption while maintaining compatibility with industry-standard pinouts. The device operates within a supply voltage range of 7.5V to 14V and supports a no-load operating current of 2.3 mA. It features a 100% duty cycle capability and includes under-voltage lockout (UVLO) functionality starting at 7.0V. The component is housed in an 8-MSOP package and is rated for operation across a temperature range of -40°C to 105°C.

Power Supply Controllers, Monitors Feature Summary

• Advanced BiCMOS design ensures significantly improved performance compared to legacy controllers.
• Pin-compatible with the industry-standard 384x family of controllers for easy integration.
• Supports 100% duty cycle operation for efficient power conversion.
• Integrated under-voltage lockout protects against low input voltage conditions.

Power Supply Controllers, Monitors Applications

• Flyback converter designs
• Forward converter architectures
• General-purpose DC-DC switching power supplies

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix (e.g., IUZ vs. IUZ-T) to confirm tape-and-reel versus tube packaging requirements. Confirm RoHS compliance status as per the latest datasheet revision. Check for End-of-Life (EOL) notices or last-time-buy dates, as availability may be restricted. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Power Supply Controllers, Monitors Selection Notes

Select this component when a drop-in replacement for the 384x family is required without redesigning the PCB footprint. Consider the 2.3 mA no-load current for applications prioritizing efficiency in standby modes. Verify that the 7.0V UVLO threshold aligns with the system's minimum input voltage requirements. Ensure the 8-MSOP thermal pad capabilities meet the thermal dissipation needs of the target application.

Power Supply Controllers, Monitors Part Context

The ISL6840IUZ belongs to the ISL684x family of PWM controllers from Renesas Electronics (formerly Intersil). This family is engineered to provide enhanced performance over traditional discrete solutions. The part serves as a bridge between older legacy systems and modern efficiency standards, allowing manufacturers to upgrade power supply designs while retaining existing board layouts.

Power Supply Controllers, Monitors Replacement Considerations

Direct pin-compatible substitutes include other members of the ISL684x family, such as the ISL6841, ISL6842, ISL6843, and ISL6844, depending on specific feature requirements like soft-start or additional protection mechanisms. Legacy equivalents from other manufacturers may require schematic adjustments due to pinout differences.