MP3398BGF-Z

Overview

The MP3398BGF-Z is a four-channel boost white LED controller from Monolithic Power Systems, designed for driving WLED arrays in large LCD panel backlight applications. It operates within an input voltage range of 5 V to 28 V and supports a fixed switching frequency of 540 kHz. Each channel provides a maximum output current of 350 mA. The device utilizes peak current mode control with internal current sources to ensure precise current matching between strings. It features PWM dimming capabilities and is housed in a TSSOP-EP-16 package.

Feature Summary

• Four independent channels with internal current sources for balanced LED string regulation
• Supports PWM dimming for flexible brightness control
• Includes overcurrent latch-off protection for enhanced system safety

Applications

• Large LCD panel backlighting systems
• White LED array drivers
• Multi-string LED lighting modules

Procurement Notes

Verify the specific suffix against official datasheets to confirm functional differences, as variants like the MP3398A differ in protection logic. Ensure compatibility with the required thermal management for the TSSOP-EP-16 package. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly to prevent package damage during manufacturing processes.

Selection Notes

Select this component when a latch-off overcurrent protection mechanism is required rather than a recoverable shutdown. Compare against the MP3398A if continuous operation after fault detection is necessary. Consider the fixed 540 kHz frequency and the specific 350 mA per channel limit when designing the external inductor and MOSFET components for the target application power requirements.

Part Context

This part belongs to the MP3398B series, which serves as a variant of the MP3398A family. While sharing similar core boosting and multi-channel drive capabilities, the B-series distinguishes itself through its specific overcurrent protection behavior. It is manufactured by Monolithic Power Systems for high-reliability display driver applications.

Replacement Considerations

The MP3398AGF-Z is a related model within the same family but typically features different protection characteristics, such as recoverable overtemperature or overcurrent shutdown rather than latch-off. Verify that the change in protection logic aligns with the system's fault recovery strategy before substituting.