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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Monolithic Power Systems Inc. MPQ3367AGRE-AEC1-P

Name: MPQ3367AGRE-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ3367AGRE-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ3367AGRE-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: LED Drivers

Package:: 24-VFQFN Exposed Pad

Datasheet:: MPQ3367AGRE-AEC1-P.pdf

Description:: IC LED DRV RGLTR PWM 150MA 24QFN

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Product details

Overview

MPQ3367AGRE-AEC1-P from Monolithic Power Systems is a 6-channel, AEC-Q100 Grade 1 automotive-qualified WLED driver with peak-current-mode boost architecture, 150mA per channel, 15000:1 PWM dimming ratio (≤200Hz), I²C interface, and integrated 100mΩ/50V MOSFET. It regulates LED string current via external ISET resistor with ±2.5% matching and drives LCD backlighting in automotive displays and tablets.

For engineers reviewing the MPQ3367AGRE-AEC1-P datasheet, MPQ3367AGRE-AEC1-P pinout, MPQ3367AGRE-AEC1-P application, or MPQ3367AGRE-AEC1-P equivalent, key selection considerations include its AEC-Q100 qualification, phase-shifted PWM dimming for EMI/noise reduction, configurable OVP/STH thresholds, thermal foldback behavior, and QFN-24 (4mm×4mm) wettable flank package for automated optical inspection.

Technical Context

The MPQ3367AGRE-AEC1-P implements a constant-frequency peak-current-mode boost converter with six independent cathode-connected current sinks. Its control loop uses an internal 2V reference and error amplifier to regulate VOUT based on the highest forward voltage among active LED strings, while cycle-by-cycle current limiting protects the 100mΩ internal MOSFET during transients.

Dimming is implemented through three modes-direct PWM, analog, and mix-with mode selection via MIX/AD pin voltage or I²C register. The phase shift function distributes PWM on-times across channels (60° for 6 strings, 90° for 4), reducing input ripple and audible noise, while frequency spread spectrum lowers EMI peaks without compromising regulation stability.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.5V to 36V - supports wide automotive battery range including cold-crank (≥4.5V) and load-dump (≤42V abs max).
Max Output Current per Channel	150mA - sets upper bound for single-string LED drive capability; actual current set by ISET resistor (e.g., 50mA typical with 24.9kΩ).
PWM Dimming Ratio	15000:1 at f_PWM ≤ 200Hz - enables ultra-low-brightness operation in instrument clusters and infotainment displays without visible flicker.
Switching Frequency	Configurable up to 2.2MHz - allows optimization for EMI (higher f_SW) or efficiency (lower f_SW); supports external sync for system-level clock alignment.
Current Matching	±2.5% between channels - ensures uniform brightness across multi-string LCD backlights without per-string calibration.
OVP Threshold	Configurable via resistor divider on OVP pin (typ. 2.0V) - prevents overvoltage damage during open-string faults or transient overloads.
Thermal Protection	Auto-decrease LED current above 170°C - maintains safe junction temperature without latching shutdown, supporting continuous operation in sealed enclosures.
I²C Address Options	3 selectable addresses (0x38/0x39/0x3A) via ADR pin - enables multi-device bus configuration without address conflict in complex display modules.

Pinout & Package

The MPQ3367AGRE-AEC1-P is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with wettable flank leads (E-suffix), enabling reliable solder-joint inspection in automotive production. Exposed pad must be connected to AGND for optimal thermal performance (θ_JA = 42°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 DIM	PWM brightness control input	Accepts 100Hz–20kHz PWM signal; determines dimming duty cycle in PWM/mix modes; internally pulled low.
2 MIX/AD	Dimming mode selection	Resistor-set voltage selects analog/PWM/mix mode; floating enables I²C-controlled mode selection.
3 FREQ/SYNC	Switching frequency configuration	Resistor sets f_SW; external clock input synchronizes boost switching to system master clock.
4 EN	Enable/disable control	Active-high logic; <1.2V disables IC and reduces quiescent current to 1μA.
5 SCL/PSE & 6 SDA/PSE	I²C interface + phase shift enable	When tied together and biased 0.75–1.0V, enables channel-phase-shifted PWM dimming; also serve as standard I²C pins.
9 ISET	LED current reference	Connects to GND via precision resistor; sets full-scale current (e.g., 50mA @ 24.9kΩ); 1.2V internal reference.
11–16 LED1–LED6	LED string cathode current sinks	Each sinks up to 150mA; unused pins must be tied to GND for automatic channel disable and fault detection.
19 OVP & 20 STH	Protection threshold programming	OVP sets overvoltage trip point; STH sets LED short-detection threshold - both resistor-configurable for design flexibility.
21 ADR	I²C address selection	Three logic states (float/<0.4V/0.4–1.4V) select I²C address (0x38/0x39/0x3A) for multi-device bus topology.
23 SD	External PMOS gate drive	Drives external high-side disconnect switch during fault conditions (OVP/OCP/OTP); open-drain output referenced to VIN.

Key Features

Feature	Design Value
Low-EMI architecture	Frequency spread spectrum + phase-shifted PWM dimming reduce conducted/emission peaks, easing CISPR-25 Class 5 compliance.
Multi-dimming flexibility	Hardware-selectable (MIX/AD pin) or I²C-programmable analog/PWM/mix modes - supports legacy analog dimming and high-ratio digital control in same BOM.
AEC-Q100 Grade 1 qualification	Rated for -40°C to +125°C junction operation with full parametric validation - suitable for dashboard, center-stack, and HUD display applications.
Robust fault protection	Integrated OVP, OCP, OTP, LED short/open, and inductor short detection with fault flag (FF) output and auto-recovery or latch-off options.
Configurable protection thresholds	OVP and STH pins allow tuning of overvoltage and LED short thresholds to match specific LED string V_F and layout parasitics.
Wettable flank QFN package	Enables automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing requirements.

Applications

Automotive Instrument Clusters

Center-Stack Infotainment Displays

Use Scenario: High-contrast, variable-brightness backlighting for TFT-LCD gauges operating across -40°C to +85°C ambient.

IC Role / Device Role / Timing Role: 6-channel constant-current sink driving segmented LED arrays; phase-shifted PWM dimming eliminates audible coil whine during night-mode transitions.

Use Value: 15000:1 dimming ratio enables seamless transition from daylight-readable (1000 cd/m²) to night-driving (<0.1 cd/m²) brightness without flicker or color shift.

Use Scenario: Backlight for 10.25" capacitive-touch LCD in vehicle HVAC and media control panel.

IC Role / Device Role / Timing Role: I²C-configured WLED driver with programmable OVP threshold and thermal foldback, synchronized to system MCU via FREQ/SYNC pin.

Use Value: Configurable dimming modes allow OEMs to reuse same hardware for entry-level (analog dimming) and premium (PWM+phase shift) trim levels.

Automotive Head-Up Displays (HUD)

Industrial Panel PCs

Use Scenario: Compact, high-efficiency backlight for combiner-based HUD with tight thermal envelope and EMI-sensitive projection optics.

IC Role / Device Role / Timing Role: Boost converter with 2.2MHz switching and spread spectrum; 60° phase shift across 6 channels minimizes input capacitor ripple current.

Use Value: Low EMI and precise current matching ensure no interference with HUD image generation circuitry or GPS/IMU sensors mounted nearby.

Use Scenario: Ruggedized medical or factory-floor tablet requiring AEC-Q100 reliability and long-term supply continuity.

IC Role / Device Role / Timing Role: Automotive-grade WLED driver used in non-automotive industrial setting; leverages AEC-Q100 qualification for extended lifetime and reduced field failure risk.

Use Value: Guaranteed -40°C to +125°C operation and 15-year automotive lifecycle support mitigate obsolescence risk in long-lifecycle industrial designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ3367AGR-AEC1	No wettable flank (standard QFN-24); identical electrical specs and pinout.	Lacks AOI-compatible leads; not approved for automotive production lines requiring solder-joint inspection.	Select when cost sensitivity outweighs AOI requirement or for non-automotive use cases.
LM3409QMYX/NOPB	Single-channel, external MOSFET, no I²C, 1000:1 dimming ratio, no phase shift.	Requires 6x discrete drivers + MCU GPIOs for multi-string control; lacks integrated protections and dimming flexibility.	Choose only for simple, low-channel-count designs where integration and AEC-Q100 are not required.

Compared with MPQ3367AGR-AEC1, the MPQ3367AGRE-AEC1-P adds wettable flank leads for automated optical inspection - essential for Tier-1 automotive assembly - while retaining identical electrical performance and AEC-Q100 qualification. Versus LM3409QMYX/NOPB, it delivers 6-channel integration, 15× higher dimming ratio, I²C configurability, and comprehensive fault reporting in a single package.

Availability

MPQ3367AGRE-AEC1-P is available at Aetrix Electronics and suitable for automotive instrument clusters, center-stack infotainment displays, and industrial panel PCs requiring stable component supply, AEC-Q100 compliance, and long-term manufacturing continuity.

Supply support for MPQ3367AGRE-AEC1-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 power management ICs, with core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and consumer markets.

The MPQ3367A product line delivers highly integrated, AEC-Q100-qualified WLED drivers targeting automotive display backlighting - emphasizing low EMI, ultra-high dimming ratios, and robust fault protection for safety-critical human-machine interfaces.

FAQ

What is the purpose of the STH pin?

The STH (Short LED Threshold) pin configures the LED short-circuit detection threshold using an external resistor. With an internal 18μA current source, the voltage at STH determines the comparator trip point - lower voltages raise the threshold, allowing detection of partial shorts in high-V_F LED strings. Floating STH defaults to internal threshold selection via TH_S1:0 bits.

How does phase shift improve PWM dimming performance?

Phase shift staggers the PWM on-time of each LED channel (e.g., 60° apart for 6 strings), reducing peak input current and associated EMI. This eliminates audible coil whine caused by simultaneous inductor charging and lowers RMS ripple on input capacitors - critical for meeting CISPR-25 emissions limits in automotive environments.

Can unused LED channels be disabled without hardware modification?

Yes. The MPQ3367AGRE-AEC1-P supports software channel disable via the CH2:0 register bits over I²C. For example, writing 0b001 disables LED6 only, while 0b010 disables LED5–LED6. Hardware disable (tying unused LEDx pins to GND) is also supported and triggers automatic detection during startup.

What is the minimum recommended ISET resistor value?

The minimum recommended ISET resistor is 10kΩ, corresponding to ~100mA full-scale current (I_LED = 1.2V / R_ISET). Lower values increase current but reduce accuracy due to ISET pin bias current effects and may exceed thermal limits under high-V_OUT conditions. Always verify power dissipation in ISET resistor per application voltage/current.

Does the device support synchronization to an external clock?

Yes. The FREQ/SYNC pin accepts an external clock signal (CMOS/TTL compatible) to synchronize the boost converter's switching frequency to a system master clock. This eliminates beat frequencies in multi-rail systems and simplifies EMI filter design by fixing the fundamental switching frequency and harmonics.

How is thermal foldback implemented?

Thermal foldback begins at 170°C junction temperature (T_ST rising edge). Above this threshold, the device linearly reduces LED current to maintain T_J ≤ 170°C, rather than latching off. Hysteresis of 20°C ensures stable recovery once temperature drops below 150°C - preserving display functionality during transient overheating.

What protection features trigger the FF (fault flag) pin?

The open-drain FF pin pulls low during over-voltage (OVP), over-current (OCP), over-temperature (OTP), LED short, LED open, and inductor short faults. It remains asserted until the fault condition clears and the device resets - either automatically after fault removal (for non-latched faults) or via EN toggle (for latched faults).

MPQ3367AGRE-AEC1-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Up (Boost)

Internal Switch(s):: Yes

Number of Outputs:: 6

Voltage - Supply (Min):: 3.5V

Voltage - Supply (Max):: 36V

Voltage - Output:: 50V

Current - Output / Channel:: 150mA

Frequency:: 340kHz ~ 2.42MHz

Dimming:: Analog, I2C, PWM

Applications:: Backlight

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 24-QFN-WF (4x4)

MPQ3367AGRE-AEC1-P FAQ

1.How can I place an order for MPQ3367AGRE-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ3367AGRE-AEC1-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MPQ3367AGRE-AEC1-P reliable?

The price and inventory of MPQ3367AGRE-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ3367AGRE-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ3367AGRE-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3367AGRE-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ3367AGRE-AEC1-P?

MPQ3367AGRE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ3367AGRE-AEC1-P order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MPQ3367AGRE-AEC1-P?

For technical support, including MPQ3367AGRE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3367AGRE-AEC1-P requirements.

6.How does Aetrix verify that MPQ3367AGRE-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ3367AGRE-AEC1-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPQ3367AGRE-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ3367AGRE-AEC1-P?

All MPQ3367AGRE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3367AGRE-AEC1-P, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MPQ3367AGRE-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ3367AGRE-AEC1-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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