MP4688DN-LF

Description：IC LED DRVR RGLTR PWM 1A 8SOICE
Series：-
Mfr：Monolithic Power Systems Inc.
Package：Tube

SKU:749c26606dde Category: LED Drivers IC Brand: Monolithic Power Systems Inc.

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Product introduction

Product Detailed Parameters

Description：IC LED DRVR RGLTR PWM 1A 8SOICE
Series：-
Mfr：Monolithic Power Systems Inc.
Package：Tube
Type：DC DC Regulator
Topology：Step-Down (Buck)
Internal Switch(s)：Yes
Number of Outputs：1
Voltage - Supply (Min)：4.5V
Voltage - Supply (Max)：75V
Voltage - Output：-
Current - Output / Channel：1A
Frequency：2MHz
Dimming：PWM
Applications：Lighting
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
Supplier Device Package：8-SOICE
Grade：Automotive
Qualification：-

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MP4688DN-LF

Overview

The MP4688DN-LF is a high-voltage input buck switch-mode regulator designed for driving high-power LEDs. It integrates a high-side power MOSFET with a typical current limit of 3.2A and supports an operating input voltage range from 4.5V to 80V. The device delivers up to 1A of constant LED current with ±5% accuracy using proprietary feedback control. It features hysteresis current mode control for fast response, supporting dimming frequencies up to 20kHz. The switching frequency reaches 2MHz, enabling the use of small external components. Quiescent current is 170µA, suitable for battery applications. Protection includes over-temperature shutdown and short-circuit protection.

Feature Summary

Integrates a high-side power MOSFET with 3.2A typical current limit
Hysteresis current mode control eliminates compensation requirements
Proprietary feedback scheme minimizes external component count
Supports PWM dimming control input for light regulation

Applications

Automotive lighting systems
Industrial lighting fixtures
General illumination applications

Procurement Notes

Verify the specific suffix (e.g., -LF-P or -LF-Z) against the required tape-and-reel quantity or tube packaging. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the ordering part number matches the exact package variant and temperature grade specified in the design documentation to avoid compatibility issues.

Selection Notes

Select this component when a wide input voltage range up to 80V is required for LED driving. It is appropriate for designs needing hysteresis control to simplify compensation networks. Consider the 170µA quiescent current for efficiency in battery-powered scenarios. Verify that the 2MHz switching frequency aligns with EMI constraints and available passive component sizes.

Part Context

The MP4688 belongs to Monolithic Power Systems' family of high-voltage buck regulators tailored for LED applications. It distinguishes itself through integrated high-side MOSFETs and hysteresis control, reducing external BOM complexity compared to traditional PWM controllers. The device targets robust performance in automotive and industrial environments requiring high input voltage tolerance.