Monolithic Power Systems Inc. MP4060GS-Z

Overview

MP4060GS-Z from Monolithic Power Systems is a TRIAC-dimmable, primary-side control LED controller optimized for 200–265VAC input, delivering PFC and boundary-conduction-mode operation with integrated thermal foldback, active bleeder control (BD pin), and warm-sunset dimming support via DIM pin. It enables single-stage AC/DC LED drivers up to 50W with deep dimming range and high power factor (>0.9). Used in residential and commercial solid-state lighting.

For engineers reviewing the MP4060GS-Z datasheet, MP4060GS-Z pinout, MP4060GS-Z application, or MP4060GS-Z equivalent, key selection criteria include its 200–265VAC input optimization, adaptive leading/trailing-edge dimmer detection thresholds (VMULT_LD_HIGH = 0.26–0.30 V, VMULT_TL_LOW = 0.08–0.12 V), real-current control architecture, SOIC-8 package compatibility, and integrated OVP/SCP/OTP protections with auto-restart.

Technical Context

The MP4060GS-Z implements real-current control using primary-side sensing-no optocoupler or secondary feedback required-by calculating LED current from VREF (0.414 V), transformer turns ratio (N), and sense resistor (RS) per I_OUT ≈ (V_REF × N) / (2 × R_S). Its multiplier circuit (MULT pin) shapes the MOSFET peak current into a sinusoid aligned with rectified line voltage to achieve >0.9 PF.

It operates in boundary-conduction mode (BCM), triggering MOSFET turn-on at zero-current crossing detected on ZCD (threshold 0.27–0.33 V, hysteresis 550–625 mV) to minimize switching losses and EMI. Adaptive dimmer detection uses VMULT waveform analysis to distinguish leading-edge (TRIAC) and trailing-edge (ELV) types, enabling phase-cut-based dimming with deep dimming range and robust compatibility across dimmer brands.

Key Specifications

Pinout & Package

MP4060GS-Z is packaged in SOIC-8, with pins arranged as follows: MULT (1), ZCD (2), VCC (3), BD (4), D (5), S (6), GND (7), COMP (8). The BD pin integrates an open-drain FET (R_DS(ON)_BD = 60–115 Ω) for active bleeder disable; DIM functionality is not exposed in SOIC-8 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP4060GS-Z, MP4061GS-Z adds DIM and DAMP functionality in MSOP-10 for advanced dimming topologies, while BP57722 sacrifices integration and protection for BOM cost reduction-making MP4060 the balanced choice for reliable, certified 200–265VAC TRIAC-dimmable drivers.

Availability

MP4060GS-Z is available at Aetrix Electronics and suitable for residential lighting, commercial panel lights, and industrial high-bay fixtures requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for MP4060GS-Z 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.

The MP4060 belongs to MPS's LED Driver product line, engineered specifically for high-line TRIAC-dimmable, single-stage AC/DC LED drivers requiring high PF, deep dimming, and thermal resilience in compact form factors.

FAQ

What is the maximum output power supported by MP4060GS-Z?

The MP4060GS-Z is validated for solid-state lighting applications up to 50W, as confirmed in the datasheet's Typical Application section and thermal derating curves. Its SOIC-8 package (θ_JA = 96°C/W) and 250 mΩ internal MOSFET limit continuous operation to ≤50W at 230VAC with adequate heatsinking and airflow. Higher power requires MSOP-10 (MP4061) or discrete FET solutions.

Does MP4060GS-Z support both leading-edge and trailing-edge dimmers?

Yes-MP4060GS-Z features adaptive dimmer type detection that automatically distinguishes leading-edge (TRIAC) and trailing-edge (ELV) dimmers using VMULT waveform analysis. It applies distinct detection thresholds (e.g., VMULT_LD_HIGH = 0.26–0.30 V, VMULT_TL_LOW = 0.08–0.12 V) and blanking times (tLD = 86–134 µs, tTL = 388–602 µs) to ensure compatibility and deep dimming with both types.

How does the BD pin simplify bleeder circuit design?

The BD pin integrates an open-drain FET (R_DS(ON)_BD = 60–115 Ω) that actively pulls down the gate/base of an external bleeder transistor during TRIAC off-time. This eliminates the need for passive bleeder resistors that waste power continuously, reducing standby consumption and improving THD-critical for meeting IEC 61000-3-2 Class C requirements.

Can MP4060GS-Z be used in isolated flyback topologies?

Yes-MP4060GS-Z supports isolated flyback configurations, as shown in the "Isolated Dual-Channel LED Driver for Warm Sunset Dimming Application" schematic. It relies on ZCD connected to an auxiliary winding for zero-current detection and real-current control, eliminating optocoupler dependency while maintaining ±3% LED current regulation accuracy.

What protection features include auto-restart functionality?

All fault protections-output over-voltage (OVP), output short-circuit (SCP), winding short-circuit, supply under-voltage lockout (UVLO), and over-temperature (OTP)-feature auto-restart. Upon fault detection, the IC halts switching, discharges VCC below VCCEN (6.7–7.6 V), then re-initiates the internal charging sequence once AC line power cycles or recovers, ensuring fail-safe recovery without manual reset.

Is the DIM pin available on the MP4060GS-Z (SOIC-8) package?

No-the DIM pin is only available on the MSOP-10 variant (MP4061GK-Z). The SOIC-8 MP4060GS-Z omits DIM functionality; warm-sunset dimming requires either the MP4061 or external PWM injection into the COMP node, which compromises regulation accuracy and is not recommended per the datasheet.

What is the minimum off-time (tOFF_MIN) and why is it critical?

tOFF_MIN is 4–8 µs, enforced to limit maximum switching frequency and suppress high-frequency EMI. In boundary-conduction mode, variable frequency can exceed 500 kHz at low line; this hard clamp ensures consistent EMI filter design, reduces MOSFET stress, and maintains >75% efficiency across 200–265VAC input range per conducted/radiated EMI test data.