Monolithic Power Systems Inc. MP44010HS-LF-P

Overview

MP44010HS-LF-P from Monolithic Power Systems is a boundary conduction mode (BCM) active power factor correction (PFC) controller in SOIC-8 package, designed for pre-regulator stages up to 300W. It delivers accurate output voltage regulation via internal 2.5V reference and high-gain error amplifier, features ultra-low 15μA start-up current and 0.46mA quiescent current, and integrates on-chip R/C filtering on the CS pin to eliminate external components. It is used in offline AC/DC adaptors requiring IEC 61000-3-2 compliance.

For engineers reviewing the MP44010HS-LF-P datasheet, MP44010HS-LF-P pinout, MP44010HS-LF-P application, or MP44010HS-LF-P equivalent, key selection considerations include its zero-crossing compensation for THD reduction, dual-stage over-voltage protection (static/dynamic), ±800/+1150mA peak gate drive capability, and SOIC-8 thermal performance with θJA = 90°C/W.

Technical Context

The MP44010HS-LF-P implements a voltage-mode BCM control architecture where the multiplier output shapes the sinusoidal current reference using rectified line voltage at MULT pin, while ZCS pin detects inductor zero-current transitions to trigger MOSFET turn-on with 175µs timeout backup. Its error amplifier regulates output voltage by comparing FB pin voltage against 2.5V internal reference, with COMP pin driving the multiplier input.

Dynamic OVP monitors COMP pin current: at >35µA it reduces multiplier gain; at >40µA it disables gate drive entirely. Static OVP triggers when COMP falls below 2.2V under light-load conditions. The integrated ZCS clamp (0.3–0.55V low, 7.2–8.35V high) and CS clamp (1.58–1.83V) ensure robust noise immunity and timing accuracy across -40°C to +125°C.

Key Specifications

Pinout & Package

MP44010HS-LF-P is housed in a standard SOIC-8 package (JEDEC MS-012, variation AA) with 1.27mm pitch, 3.8–4.0mm body width, and 4.8–5.0mm length. Thermal resistance is θJA = 90°C/W on 4-layer PCB per JESD51-7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boundary-mode PFC controller applications.

Compared with UCC28051DR and FAN6300MX, MP44010HS-LF-P uniquely integrates ZCS sensing, on-chip CS filtering, and dual-stage OVP-reducing component count by up to 7 parts and eliminating timing calibration effort in new BCM designs.

Availability

MP44010HS-LF-P is available at Aetrix Electronics and suitable for offline adaptors, electronic ballasts, LLC front ends, and industrial power supplies requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP44010HS-LF-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.

The MP44010 belongs to MPS's boundary-mode PFC controller product line, engineered specifically for cost-sensitive, high-efficiency AC/DC front-ends up to 300W that must meet global harmonic standards without complex external circuitry.

FAQ

What is the minimum input voltage required to initiate switching?

The MP44010HS-LF-P turns on when VIN reaches 11V to 13.5V (typical 12.4V), with built-in hysteresis of 2.1–3V to prevent chattering near threshold. Startup is guaranteed with 15μA current draw, enabling direct connection to high-impedance auxiliary windings without start-up resistors.

How does the zero-crossing compensation reduce THD?

The MP44010HS-LF-P injects a 30mV offset into the multiplier output near AC line zero-crossing, increasing conduction time at low instantaneous voltages. This forces higher average current at voltage minima, flattening the current waveform envelope and reducing odd-order harmonics per IEC 61000-3-2.

Can the MP44010HS-LF-P drive a 600V GaN HEMT directly?

No. While the GATE pin delivers ±800/+1150mA peak current, its high-level output is clamped to 12–13.5V, insufficient for reliable enhancement-mode GaN gate drive. It is optimized for silicon MOSFETs like IPP50R350CP; GaN use requires external level-shifting and gate voltage boosting.

What happens during dynamic over-voltage events?

When COMP pin current exceeds 35μA, the multiplier gain is reduced to limit energy transfer; above 40μA, gate drive is disabled and the IC enters idle state until current drops below 10μA, at which point the internal starter re-enables switching after 80–280μs.

Is an external filter required on the CS pin?

No. The MP44010HS-LF-P integrates an on-chip R/C filter on the CS pin, eliminating the need for external components. However, layout best practice still recommends keeping the current-sense resistor trace short and low-inductance to avoid false triggering from dV/dt noise.

What is the purpose of the ZCS pin's 175µs timeout feature?

The 175µs timer ensures MOSFET turn-on during startup or fault conditions when no valid ZCS signal is present-such as before auxiliary winding voltage builds up or during open-winding faults-preventing latch-up and enabling graceful recovery without external watchdog circuitry.

Does the MP44010HS-LF-P support burst-mode operation at light loads?

Yes. Under light load, the error amplifier output saturates low (<2.2V), triggering static OVP and disabling gate drive. The IC remains in low-quiescent (0.42mA) idle state until load increases and COMP rises back into linear region, enabling natural burst-mode behavior without external control.