MP4657BGS-Z

Overview

The MP4657BGS-Z is a pure single-stage flyback LED driver and system voltage controller from Monolithic Power Systems. It integrates four output channels for driving LED strings within a SOIC-16 package. The device operates with an input voltage range of 4 V to 16 V and supports switching frequencies between 20 kHz and 350 kHz. It features PWM dimming capability, thermal protection, and safeguards against LED open and short circuits. Designed for LCD monitors and TVs, it ensures high efficiency and fast dynamic control.

Feature Summary

• Integrates pure single-stage flyback topology for combined LED current regulation and system voltage control
• Provides four independent output channels for multi-string LED applications
• Supports PWM dimming for precise brightness adjustment
• Includes built-in thermal protection and circuit fault detection

Applications

• LCD Monitor backlighting systems
• Television LED backlighting modules
• Single-stage AC/DC power supplies with integrated LED drive

Procurement Notes

Verify the specific suffix 'Z' indicates RoHS compliance and halogen-free status as per manufacturer standards. Confirm the SOIC-16 package dimensions match your PCB footprint requirements. Ensure the 4 V to 16 V input voltage range aligns with your system's supply specifications before finalizing procurement.

Selection Notes

Select this component when a single-chip solution is required for both primary-side regulation and LED string driving in flyback converters. It is suitable for designs needing four-channel output control without external multiplexers. Consider the 20 kHz to 350 kHz frequency range for EMI management and transformer sizing optimization in compact display power architectures.

Part Context

This part belongs to the MP4657 series of LED lighting drivers designed by Monolithic Power Systems. The series focuses on simplifying power supply designs for display applications by integrating multiple functions into one IC. It replaces discrete solutions that previously required separate controllers for voltage regulation and LED current control.

Replacement Considerations

Direct substitutes include other MPS parts within the MP4657 family, such as the MP4657AGS-Z or MP4657AGS-P, which share identical electrical characteristics and pinouts but may differ in packaging tape-and-reel specifications or environmental certifications.