Monolithic Power Systems Inc. MP4013BGS-Z

Overview

MP4013BGS-Z from Monolithic Power Systems is a high-brightness, high-current-accuracy WLED controller IC designed for constant-current LED driver applications in boost and SEPIC topologies. It operates from 8V–26V input, delivers ±1.2% LED current regulation via 600mV FB reference, supports programmable switching frequency (112–670 kHz), and integrates fast PWM dimming with deep dimming ratio for LCD backlighting systems.

For engineers reviewing the MP4013BGS-Z datasheet, MP4013BGS-Z pinout, MP4013BGS-Z application, or MP4013BGS-Z equivalent, key selection considerations include its dual analog dimming (DC/pulse-input), integrated OVP/SCP/OTP protection, SOIC-16 package thermal performance (θJA = 80°C/W), and external MOSFET gate drive capability (1.5A source / 0.7A sink).

Technical Context

The MP4013BGS-Z implements peak-current-mode control with built-in slope compensation to prevent subharmonic oscillation at duty cycles >0.5. Its error amplifier features 370 µA/V transconductance and COMP pin-based loop compensation supporting RCC networks for stable regulation across wide LED voltage ranges (up to 150V output).

It integrates dual dimming paths: DC analog dimming via ADIM pin (0–2.34V linear control) and pulse-signal analog dimming via ADIM_P with internal R-C averaging; plus independent PWM dimming on PWM pin that disables GATE/DIMO and holds COMP voltage for flicker-free 0.1% duty-cycle operation.

Key Specifications

Pinout & Package

MP4013BGS-Z is housed in a standard SOIC-16 package (3.90 mm × 9.90 mm, 1.75 mm height), JEDEC MS-012 compliant, with exposed pad not electrically connected. Thermal resistance θJA = 80°C/W on 4-layer PCB per JESD51-7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar WLED controller applications.

Compared with MP4013BGS-Z, MP4015GS-Z extends input range and adds EMI reduction, while LT3761EFE#PBF supports higher output voltages and integrates more power-stage drivers - both require layout and compensation revalidation despite functional overlap.

Availability

MP4013BGS-Z is available at Aetrix Electronics and suitable for LCD backlighting, industrial LED driver, and automotive cabin lighting applications requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP4013BGS-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 MP4013B product line targets high-efficiency, high-accuracy LED lighting control - specifically engineered for wide-input-voltage, high-output-voltage WLED driver applications demanding precision dimming and robust protection.

FAQ

What is the minimum recommended input voltage for reliable startup?

The MP4013BGS-Z has a VIN UVLO threshold of 7.1 V (typical) with 395 mV hysteresis. Startup is guaranteed only when VIN rises above 7.5 V (max spec), and operation remains stable down to 6.7 V before UVLO triggers. For robust cold-start behavior in automotive or industrial environments, maintain VIN ≥ 8.5 V.

How does the ADIM_P pin function in pulse-signal analog dimming?

ADIM_P accepts high-frequency pulses (>10 kHz recommended) that internally modulate a reference amplitude. An external RC filter on ADIM converts this into an averaged DC voltage proportional to pulse duty cycle. Pulling ADIM_P >6.9 V disables this mode; ADIM must be held ≥2.43 V when unused to prevent unintended dimming.

Can MP4013BGS-Z drive multiple parallel LED strings?

No - MP4013BGS-Z regulates current through a single external sense resistor (RFB), making it suitable only for single-string constant-current operation. Parallel string control requires individual current sensing per string or a master-slave controller architecture not supported by this device.

What is the purpose of the COMP pin saturation detection time (2048 cycles)?

This timeout detects LED-cathode-to-GND shorts: when FB senses no current, COMP charges to saturation. If saturation persists for 2048 consecutive switching cycles while FB <30% of IREF, the IC latches off and asserts FAULT. This prevents uncontrolled current flow during catastrophic LED faults.

Is the 5 V REF pin capable of sourcing significant current?

The REF pin provides 5 V ±1% with ≤50 mV load regulation up to 500 µA. It is intended for biasing small-signal circuitry (e.g., op-amps, ADC references). For loads >500 µA, an external buffer or LDO is required to avoid reference droop and regulation loss.

How does leading-edge blanking on the CS pin improve noise immunity?

Leading-edge blanking disables the CS comparator for 100–250 ns after each GATE turn-on event, blocking high dv/dt switching noise from falsely triggering overcurrent protection. This allows use of smaller, lower-cost current-sense resistors without compromising reliability.

Does MP4013BGS-Z support synchronous rectification?

No - MP4013BGS-Z drives only the high-side boost switch (via GATE) and an external dimming MOSFET (via DIMO). It does not provide gate drive signals for synchronous rectifier control; external timing or dedicated controllers are needed for synchronous boost configurations.