Monolithic Power Systems Inc. MP4030GS-P

Overview

MP4030GS-P from Monolithic Power Systems is a TRIAC-dimmable, primary-side-control offline LED controller with integrated active PFC and an internal low-side MOSFET (30 V BVDSS, 250 mΩ RDS(ON)). It delivers accurate constant LED current in isolated single-stage flyback converters without optocoupler or secondary-side feedback, operates in boundary-conduction mode for high efficiency (>82%), and achieves PF >0.98 with THD <12% at 120 VAC. Used in residential and commercial dimmable LED drivers.

For engineers reviewing the MP4030GS-P datasheet, MP4030GS-P pinout, MP4030GS-P application, or MP4030GS-P equivalent, key selection criteria include its real-current-control architecture, TRIAC phase-detection thresholds (VMUL_ON = 0.35 V, VMUL_OFF = 0.15 V), internal VCC charging circuit (enabling <115 µs start-up), programmable primary-side OCP, and 8-pin SOIC thermal performance (θJA = 96 °C/W).

Technical Context

The MP4030GS-P implements proprietary real-current control using primary-side sensing via the S pin and multiplier-based reference generation from the MULT pin's half-wave sinusoid input-enabling precise LED current regulation without secondary feedback. Its zero-current detection (ZCD pin) triggers MOSFET turn-on at valley-switching points to minimize switching losses and EMI.

Built-in TRIAC dimming support uses dual-threshold detection (0.15 V OFF / 0.35 V ON) with 25% line-cycle blanking and DP pin–driven pull-down to extend dimming range and suppress flicker. Protection logic includes auto-restart over-voltage (5.5 V OVP threshold), short-circuit (COMP > 5 V), and over-temperature (150 °C junction limit) responses.

Key Specifications

Pinout & Package

The MP4030GS-P is housed in an 8-pin SOIC package with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Thermal pad is not present; θJC = 45 °C/W measured per JESD51-7 on 4-layer board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TRIAC-dimmable, primary-side LED controller applications.

Compared with MP4030GS-P, MP4028GS-P trades integration for voltage scalability but sacrifices flicker-free dimming depth and start-up speed, while BP5778E omits PFC and valley switching-making it unsuitable for ENERGY STAR or IEC 61000-3-2–compliant designs.

Availability

MP4030GS-P is available at Aetrix Electronics and suitable for residential LED downlights, commercial office troffer drivers, and industrial high-bay lighting requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for MP4030GS-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.

The MP4030 belongs to MPS's offline LED driver product line, engineered specifically for TRIAC-dimmable, single-stage PFC-enabled lighting systems targeting ENERGY STAR, DLC, and IEC 61000-3-2 compliance.

FAQ

What is the function of the DP pin on the MP4030GS-P?

The DP (Dimming Pull-Down) pin is the drain terminal of an internal MOSFET used to actively discharge the rectified input voltage during the TRIAC OFF interval. By connecting an external resistor from DP to the D pin, it pulls down the MULT node voltage rapidly, preventing false dimming detection and extending the usable dimming range down to 10% brightness without flicker.

Does the MP4030GS-P require an external MOSFET?

No-the MP4030GS-P integrates a low-side 30 V MOSFET with 250 mΩ typical RDS(ON) on-chip. It is designed for ≤48 V output LED strings in single-stage flyback topologies. For higher output voltages or currents, external MOSFETs are not supported; instead, use MP4028GS-P, which omits the internal switch.

How does the MP4030GS-P achieve power factor correction without a current sensor on the AC line?

It uses the MULT pin to sample a scaled version of the rectified line voltage, feeding it into an internal analog multiplier. Combined with the COMP voltage (error amplifier output), this generates a sinusoidal current reference that shapes the primary inductor current waveform-achieving >0.98 PF without auxiliary current transformers or Hall-effect sensors.

What protection features does the MP4030GS-P include, and how do they reset?

The device includes over-voltage (ZCD > 5.5 V), short-circuit (COMP > 5 V), primary over-current (ZCD > 0.9 V), over-temperature (150 °C), and UVLO protection. All trigger auto-restart: after latching off, the IC waits until VCC drops below 7 V, then recharges VCC to 10 V and resumes switching-no manual reset or external circuitry required.

Can the MP4030GS-P operate with both leading-edge and trailing-edge TRIAC dimmers?

It is optimized for leading-edge (standard incandescent) TRIAC dimmers. While it may function with some trailing-edge (ELV) dimmers, MPS does not characterize or guarantee performance-especially hold-current maintenance and minimum dimming level-under trailing-edge conditions due to differing waveform dynamics and zero-crossing behavior.

What is the recommended value for the MULT pin resistor divider?

The MULT pin expects a peak voltage of ≤7 V from the rectified line. For 120 VAC (170 V peak), a typical divider uses 499 kΩ (top) and 7.5 kΩ (bottom), yielding ~2.5 V peak. For 230 VAC (325 V peak), scale proportionally-e.g., 953 kΩ / 14.3 kΩ-to maintain same ratio and avoid exceeding ZCD pin absolute max rating.

Is the MP4030GS-P RoHS-compliant and halogen-free?

Yes-MP4030GS-P is lead-free and fully compliant with the EU RoHS Directive 2011/65/EU. MPS confirms halogen-free status per IEC 61249-2-21; the SOIC8 package uses matte tin lead finish and green molding compound.