MIC2291-15BML-TR

LED Driver IC Overview

The MIC2291-15BML-TR is a 1.2MHz pulse-width modulation (PWM) boost-switching regulator optimized for high-current white LED photo flash applications. It features an internal switch with a guaranteed current of 1.2A and operates within an input voltage range of 2.5V to 10V. The device provides an output voltage up to 34V, with specific over-voltage protection set at 15V. It utilizes a constant frequency PWM control scheme to minimize noise and input ripple. The feedback voltage is set to 95mV to reduce power dissipation. The component supports analog and PWM dimming and includes over-temperature protection and UVLO.

LED Driver IC Feature Summary

• Optimized for high-current white LED photo flash driving with integrated 1.2A switch
• Constant frequency 1.2MHz PWM operation reduces external component size and system noise
• Low 95mV feedback voltage minimizes total output voltage and battery current draw
• Integrated 15V over-voltage protection allows use of smaller external components

LED Driver IC Applications

• Camera flash circuits
• High-brightness white LED strings
• Mobile phone camera modules

LED Driver IC Procurement Notes

Verify the suffix BML indicates the 8-lead 2mm x 2mm MLF package variant. Confirm the -15 designation matches the required 15V over-voltage protection threshold for your circuit design. Ensure compatibility with Microchip's RoHS and REACH compliance standards. Check for any recent packing change notices or final test location updates that may affect logistics. Validate the part status as active before finalizing procurement plans.

LED Driver IC Selection Notes

Select this component when designing for compact camera flash applications requiring high peak currents. The 15V OVP option is suitable for driving series LED strings where lower voltage ratings are preferred. Consider the 8-MLF package for space-constrained PCB layouts. Evaluate the 1.2A switch current limit against the target LED string requirements. Ensure the input supply voltage remains within the 2.5V to 10V operational range.

LED Driver IC Part Context

This part belongs to the MIC2291 family of boost regulators manufactured by Microchip Technology, formerly Micrel. The family includes variants with different OVP levels, such as 34V options. The MIC2291-15BML-TR specifically denotes the version with 15V protection in the 8-lead MLF package. These devices are designed to replace discrete solutions, saving board space through high-frequency operation.

LED Driver IC Replacement Considerations

Direct substitutes include MIC2291-34YML-TR for higher voltage tolerance and MIC2291YD5-TR for SOT23-5 packaging. Verify pinout compatibility and thermal performance when swapping packages. Ensure the replacement maintains the 1.2A switch current capability and 1.2MHz switching frequency.