Monolithic Power Systems Inc. MP4088GN-P

Overview

MP4088GN-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 in residential A19/GU10 lamp designs.

For engineers reviewing the MP4088GN-P datasheet, MP4088GN-P pinout, MP4088GN-P application, or MP4088GN-P equivalent, key selection criteria include TRIAC dimming compatibility at 198–265VAC, thermal foldback behavior above 145°C, programmable OVP threshold (1.85–2.15V on OVF), and TSOT23-5 package suitability for compact retrofit lamp PCBs.

Technical Context

The MP4088GN-P implements MPS' proprietary hybrid operation mode-dynamically switching between DCM and CCM across the AC half-cycle-to maintain stable latching/holding current for reliable TRIAC triggering and smooth dimming down to low duty cycles. Its internal HV regulator enables fast start-up (<14μs) without perceptible delay, while the 0.4V CS threshold and 20ns leading-edge blanking ensure accurate peak-current sensing despite parasitic ringing.

Power management integrates VCC UVLO (3.8V turn-on / 4.3V turn-off hysteresis), thermal de-rating starting at 145°C, and full-cycle shutdown at 160°C with 50°C hysteresis. Protection includes OVP (triggered at 1.85–2.15V on OVF with 2–32μs response), SCP via extended off-time, and auto-restart during fault conditions.

Key Specifications

Pinout & Package

MP4088GN-P is packaged in TSOT23-5, a 2.9mm × 1.6mm surface-mount package with exposed pad for thermal enhancement. Pin 1 is VCC, Pin 2 is OVF, Pin 3 is GND, Pin 4 is CS, and Pin 5 is HV - all electrically and thermally optimized for non-isolated LED driver layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP4078GN-Z and BP57722E, MP4088GN-P delivers superior dimming fidelity and system-level simplicity due to its integrated 500V MOSFET, hybrid operation mode, and precise 0.4V current-sense threshold-making it optimal for certified A19/GU10 products requiring flicker-free performance and rapid time-to-market.

Availability

MP4088GN-P is available at Aetrix Electronics and suitable for residential LED retrofits, commercial directional lighting, and outdoor floodlight designs requiring stable component supply, RoHS-compliant packaging, and long-lifecycle availability.

Supply support for MP4088GN-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 solutions.

The MP4088 product line targets cost-sensitive, non-isolated LED lighting applications requiring TRIAC dimmability, high PF, and compact form factors-specifically engineered for 230VAC markets in Europe and Asia.

FAQ

What is the maximum recommended LED string voltage for MP4088GN-P?

The MP4088GN-P supports output voltages up to 55V in buck-boost configuration, validated in MPS reference designs driving 100mA strings. Exceeding this voltage risks OVP activation or reduced efficiency due to increased MOSFET conduction loss; always verify OVP resistor divider ratio for target V_OUT.

Does MP4088GN-P require an external startup resistor?

No. The MP4088GN-P integrates a high-voltage regulator that draws current directly from the HV pin to charge the VCC capacitor-eliminating the need for external startup resistors and associated power loss in standby mode.

How does thermal foldback behave during high-temperature operation?

At 145°C, MP4088GN-P begins linearly reducing LED current to prevent flicker; output drops to ~20% at 160°C, where full thermal shutdown occurs. Recovery starts at 110°C after VCC discharges and recharges via the internal HV regulator-ensuring safe, automatic restart without manual intervention.

Can MP4088GN-P operate with leading-edge and trailing-edge dimmers?

MP4088GN-P is optimized for leading-edge (TRIAC) dimmers per EN61000-3-2 and IEC61000-4-11. While it may function with some trailing-edge dimmers, MPS does not guarantee dimming performance or hold-current stability in those configurations-validation is required per end-equipment design.

What is the purpose of the exposed pad on the TSOT23-5 package?

The exposed pad on MP4088GN-P's TSOT23-5 package must be soldered to a dedicated GND copper pour to enhance thermal dissipation. This reduces θ_JA by up to 30°C/W versus non-connected pads-critical for maintaining <125°C junction temperature in enclosed lamp housings.

Is MP4088GN-P compliant with IEC62384 for LED module safety?

MP4088GN-P itself is not a safety-certified module, but it enables designs meeting IEC62384 when used with appropriate isolation barriers, creepage/clearance layout, and external protection components. Its non-isolated architecture requires full-system certification-not component-level approval.

What layout practices minimize EMI in MP4088GN-P designs?

Minimize high-di/dt loop area between HV, CS, and GND pins; place VCC capacitor ≤2mm from VCC/GND pins; route OVF feedback traces away from switching nodes; and use ground plane stitching vias near the exposed pad-per MPS AN-107 layout guidelines for TSOT23-5 LED drivers.