MIC2291-34BML-TR

LED Driver IC Overview

The MIC2291-34BML-TR is a 1.2MHz pulse-width modulation (PWM) boost-switching regulator optimized for high-current white LED photo flash applications. It features a guaranteed switch current of 1.2A, enabling the drive of three series-connected white LEDs at 100mA. The device operates with an input voltage range of 2.5V to 10V and supports output voltages up to 34V. Key electrical parameters include a 95mV feedback voltage, less than 1% line and load regulation, and a shutdown current of 1µA. It offers over-voltage protection options of 15V or 34V and functions within a junction temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Implements constant frequency 1.2MHz PWM control to minimize noise and input ripple injected into the battery source compared to variable frequency topologies.
• Utilizes a low 95mV feedback voltage reference to reduce power dissipation in the current set resistor and minimize total output voltage requirements.
• Provides selectable over-voltage protection levels of 15V or 34V to allow designers to optimize external component voltage ratings.

LED Driver IC Applications

• High-current white LED photo flash drivers
• Camera flash modules requiring compact power solutions
• Battery-powered devices needing efficient boost regulation

LED Driver IC Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm the exact over-voltage protection rating (15V vs 34V) and package variant. Ensure the ordering code matches the required thermal performance and pinout configuration for your PCB layout. Cross-reference the revision level to guarantee compatibility with existing design specifications.

LED Driver IC Selection Notes

Select this component when designing for high-brightness LED flashes where low electromagnetic interference is critical due to its constant frequency operation. The choice between 15V and 34V OVP depends on the maximum allowable voltage stress on downstream components. Consider the 8-lead MLF package for space-constrained designs requiring efficient heat dissipation.

LED Driver IC Part Context

This part belongs to the MIC2291 family of boost regulators manufactured by Microchip Technology. It is designed specifically for driving strings of white LEDs in portable electronic devices. The device integrates an internal switch and control logic to simplify the design of high-efficiency LED drivers while maintaining a small footprint through advanced packaging technologies.

LED Driver IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative suppliers or updated revisions directly with Microchip Technology before implementation.

LED Driver IC FAQ

What is the maximum output voltage capability of the MIC2291-34BML-TR?

The device supports output voltages up to 34V, which corresponds to its specific over-voltage protection rating.

How does the MIC2291 reduce noise compared to other topologies?

It uses a constant frequency 1.2MHz PWM control scheme, which results in significantly lower noise and input ripple injected back to the battery source compared to variable frequency topologies.