MP3398AGY-P

Overview

The MP3398AGY-P is a four-channel boost white LED controller designed for LCD panel backlighting. It operates with an input voltage range of 5V to 28V and supports up to 350mA per channel. The device utilizes peak current mode control with a fixed switching frequency adjustable between 150kHz and 621kHz via an external resistor. It features independent PDIM and ADIM pins for dimming, achieving a current matching accuracy of 2.5% across strings. The IC is housed in a TSSOP-16-EP package and includes comprehensive protection mechanisms such as OCP, OTP, UVP, OVP, and LED open/short circuit detection.

Feature Summary

• Four-channel boost topology with independent analog and PWM dimming capabilities
• High precision current matching ensuring uniform brightness across LED strings
• Integrated protection against over-current, over-temperature, and inductor/diode shorts
• Scalable architecture allowing multiple units to share a single power supply

Applications

• Large LCD panel backlight systems
• Television display modules
• Computer monitor backlighting
• White LED array drivers

Procurement Notes

Verify the specific suffix 'P' indicates tape and reel packaging when sourcing. Confirm the component matches the TSSOP-16-EP physical footprint requirements for your PCB layout. Ensure the design accounts for the specified thermal dissipation limits within the operating temperature range. Cross-reference the manufacturer datasheet for exact pinout definitions before finalizing assembly.

Selection Notes

Select this model for applications requiring precise current balancing across four parallel LED strings. The adjustable switching frequency allows optimization for EMI performance and external component size. The inclusion of both analog and PWM dimming modes provides flexibility for various user interface requirements. Consider the cascade capability if the application demands more than four channels using a single power source.

Part Context

This component belongs to the MP3398 series of WLED controllers from Monolithic Power Systems. It is engineered specifically for high-performance backlighting in large format displays. The series offers variants with different packages and current ratings to suit diverse board space and brightness constraints while maintaining consistent control logic and protection features.

Replacement Considerations

Direct substitutes include MP3398AGF-P and MP3398AGS-P within the same family. These alternatives offer identical electrical characteristics but differ in package type or reel quantity. Verify that any replacement maintains the required TSSOP-16-EP or compatible footprint and thermal pad configuration.