Monolithic Power Systems Inc. MP4088GJ-P

Overview

MP4088GJ-P from Monolithic Power Systems is a non-isolated, TRIAC-dimmable LED driver IC with integrated 500V MOSFET, designed for 230VAC input and up to 10W LED loads. It delivers constant current regulation via internal averaging feedback, achieves >0.7 power factor, and supports buck/buck-boost topologies using only a single-winding inductor - enabling compact, low-BOM-cost residential lighting solutions like A19 and GU10 lamps.

For engineers reviewing the MP4088GJ-P datasheet, MP4088GJ-P pinout, MP4088GJ-P application, or MP4088GJ-P equivalent, key selection criteria include its hybrid dimming mode for flicker-free TRIAC compatibility, thermal foldback behavior at >145°C, programmable OVP via external resistors, and TSOT23-5 package suitability for space-constrained PCB layouts.

Technical Context

The MP4088GJ-P implements a proprietary hybrid operation mode that dynamically switches between discontinuous conduction mode (DCM) and continuous conduction mode (CCM) across the AC half-cycle to maintain stable latching/holding current for TRIAC compatibility. Its internal high-voltage regulator draws startup current directly from the HV pin (up to 500V), eliminating auxiliary winding requirements.

Current regulation relies on an internal 0.186V reference (VREF) compared against sampled CS node voltage, with peak current limiting set at 0.46V and leading-edge blanking of 200ns. Protection logic includes VCC UVLO (3.8V turn-on / 4.3V turn-off hysteresis), OVP triggered at 2.0V on OVF pin with 2–32μs response, and thermal shutdown at 160°C with 50°C hysteresis.

Key Specifications

Pinout & Package

MP4088GJ-P is packaged in TSOT23-5 - a 2.9mm × 1.6mm surface-mount package with exposed pad for thermal enhancement and optimized for high-density LED driver PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TRIAC-dimmable LED driver applications.

Compared with MP4078GJ-Z and BP5609D, MP4088GJ-P provides superior integration (HV MOSFET + regulator), tighter current accuracy (±5% vs ±8%), and programmable protection - making it optimal for compact, high-performance 230VAC TRIAC-dimmable lamps where board space and flicker immunity are critical.

Availability

MP4088GJ-P is available at Aetrix Electronics and suitable for residential LED retrofits, commercial downlights, and smart lighting modules requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP4088GJ-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and motor control.

The MP4088 product line targets cost-sensitive, non-isolated AC/DC LED lighting applications - specifically engineered to replace magnetic transformers and simplify TRIAC-dimmable lamp design with minimal external components.

FAQ

What is the maximum output power supported by MP4088GJ-P?

MP4088GJ-P supports up to 10W of LED output power when operated from 198–265VAC input with appropriate thermal management. This rating assumes use of the TSOT23-5 package at TA ≤ 60°C and proper PCB copper area for heat dissipation. Output power scales with input voltage and thermal design - at 230VAC nominal, typical designs deliver 55V/100mA (5.5W) or 36V/250mA (9W) depending on topology and efficiency.

Does MP4088GJ-P require an auxiliary winding for startup?

No. MP4088GJ-P uses an internal high-voltage regulator powered directly from the HV pin, enabling startup from rectified AC without auxiliary windings or startup resistors. The HV pin accepts up to 500V, and the internal regulator begins charging the VCC capacitor once VHV exceeds 100V - reducing component count and improving reliability in compact lamp designs.

How does the hybrid dimming mode improve TRIAC compatibility?

The hybrid dimming mode dynamically adjusts switching behavior between DCM and CCM across the AC half-cycle to maintain sufficient latching and holding current for standard TRIAC dimmers. Unlike fixed-mode controllers, it prevents misfiring and dropout at low dimming angles by actively modulating conduction time - verified in testing with leading-edge dimmers across 10–100% phase-cut range.

What is the recommended VCC capacitor value for MP4088GJ-P?

A 10μF/25V electrolytic capacitor is recommended for the VCC pin to ensure stable operation during TRIAC dimming transients. This value provides sufficient hold-up during zero-crossing gaps and supports the internal regulator's 350μA quiescent current. For enhanced reliability in high-temperature environments (>85°C), a 105°C-rated capacitor with 15μF minimum capacitance is advised.

Can MP4088GJ-P be used in isolated topologies?

No. MP4088GJ-P is explicitly designed for non-isolated applications (buck and buck-boost) and lacks isolation-enabling features such as secondary-side feedback or transformer drive capability. Its HV pin connects directly to rectified mains, and GND is referenced to line potential - making it unsuitable for isolated flyback or forward converters without significant safety redesign.

What protection features are integrated into MP4088GJ-P?

MP4088GJ-P integrates VCC under-voltage lockout (UVLO), over-voltage protection (OVP) on the OVF pin, short-circuit protection (SCP), thermal shutdown with hysteresis, and LED current foldback above 145°C. All protections trigger auto-restart behavior except thermal shutdown, which requires junction temperature to fall below 110°C before resuming operation - preventing thermal runaway in enclosed fixtures.

Is MP4088GJ-P RoHS and halogen-free compliant?

Yes. MP4088GJ-P is lead-free, halogen-free, and fully compliant with the EU RoHS Directive 2011/65/EU. The TSOT23-5 package uses matte-tin plating and green molding compound, and MPS certifies material content through its Quality Assurance portal - including full substance declarations and conflict minerals reporting.