Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Monolithic Power Systems Inc. MPQ7231GLE-D10-AEC1-Z

Name: MPQ7231GLE-D10-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ7231GLE-D10-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPQ7231GLE-D10-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: LED Drivers

Package:: 19-PowerVFQFN

Datasheet:: MPQ7231GLE-D10-AEC1-Z.pdf

Description:: MPSAFETM 42V, 3A BUCK OR 2.4A BU

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MPQ7231GLE-D10-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fixed-frequency synchronous IR LED driver supporting buck (3A peak) or buck-boost (2.4A peak) topologies, with factory-trimmed 1ms dimming on-time limit, integrated 44mΩ/40mΩ MOSFETs, and 6V–42V input range-designed for automotive driver monitoring systems (DMS) requiring eye-safe pulsed illumination.

For engineers reviewing the MPQ7231GLE-D10-AEC1-Z datasheet, MPQ7231GLE-D10-AEC1-Z pinout, MPQ7231GLE-D10-AEC1-Z application, or MPQ7231GLE-D10-AEC1-Z equivalent, key selection criteria include its ASIL-aligned dimming time limit (1ms), dual-mode topology configurability via IREF resistor, fault-latched open/short protection, and QFN-19 wettable flank package optimized for automotive thermal and EMC requirements.

Technical Context

The MPQ7231 operates in constant-current hysteretic control mode with no loop compensation required, enabling sub-100ns transient response to LED current steps. Its dual-mode architecture selects buck (≥14.7kΩ IREF-to-GND) or buck-boost (≤9.09kΩ IREF-to-GND) based on external resistor value, with independent switching frequencies: 2.4MHz (buck, ±10% FSS) or 1.25MHz (buck-boost, ±10% FSS).

Eye safety is enforced by three factory-trimmed dimming on-time limits (1ms/3ms/5ms)-this part is D10-coded for 1ms-and integrated current limiting with latch-off behavior on ISET/NTC/FAULT pin faults. Thermal derating uses NTC-based remote sensing with configurable trip points at 0.37V (OTP) and recovery at 0.48V.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Buck (3A peak) or buck-boost (2.4A peak); selected by IREF resistor value
Input Voltage Range	6V–42V; supports automotive battery transients including 40V load dump
Dimming On-Time Limit	Factory-trimmed to 1ms (D10 variant); enforces ASIL-B compliant eye safety
Switching Frequency	2.4MHz (buck) or 1.25MHz (buck-boost), with frequency spread spectrum (±10%) for CISPR25 Class 5 EMI compliance
MOSFET R_DS(ON)	44mΩ high-side / 40mΩ low-side; reduces conduction loss vs. diode-based solutions by up to 10×
Package	QFN-19 (3mm × 4mm) with wettable flanks; enables automated optical inspection (AOI) and robust solder joint reliability
AEC-Q100 Grade	Grade 1 (−40°C to +125°C T_A, −40°C to +150°C T_J); qualified per stress test conditions for automotive powertrain & ADAS

Pinout & Package

MPQ7231GLE-D10-AEC1-Z is housed in a thermally enhanced QFN-19 (3mm × 4mm) package with wettable flanks and exposed thermal pad (PGND-connected). Pin 1 is marked by dot; pins 4/13 are VIN, pins 5/6/11/12 are PGND, and pin 15 is AGND-requiring separate analog ground routing per layout guidelines.

Pin/Terminal	Circuit Role	Design Meaning
1 NTC	Remote temperature sense input	Connects to NTC network for thermal derating; protected against short-to-PGND/AGND faults
3 EN	Enable control	Pulled low internally; requires >1V to enable; supports automatic start-up when tied to VIN via resistor
4,13 VIN	Main power input	6V–42V supply rail; requires wide PCB trace and local C_IN decoupling
5,6,11,12 PGND	Power ground return	Reference for HS/LS FETs, SW node, and thermal dissipation path; must be low-inductance plane
7 BST	Bootstrap supply	Connects CBST between SW and BST; resistor added to reduce SW ringing and improve EMI
8,9 SW	Switch node	Midpoint of internal HS/LS FETs; demands minimal-area, wide-trace layout to suppress noise coupling
10 FAULT	Open-drain fault indicator	Latches low on LED short/open, OCP, OTP, or false mode detection; includes 300kΩ pull-up to VIN
14 INGND	Buck-boost topology ground	Isolated ground for DIM/EN/FAULT in buck-boost mode; connect to PGND/AGND in buck mode
16 VCC	Internal bias supply	Requires ≥10µF X7R ceramic cap near pin; powers gate drivers and control logic
17 IREF	Mode selection & reference current	Resistor value sets topology (buck/buck-boost); also sources NTC current (5× or 50× IREF)
18 ISET	LED current programming	External resistor to GND sets average I_LED; latches off on short/open fault
19 DIM	PWM dimming input	Accepts 10Hz–2kHz PWM; on-time limited to 1ms (D10); min. 100µs high pulse to avoid false FAULT

Key Features

Feature	Design Value
Integrated current-sense resistor	Eliminates external sense resistor, reducing BOM count and board area while maintaining ±5% LED current accuracy
Frequency spread spectrum (FSS)	±10% f_SW modulation reduces peak EMI amplitude by >10dB, enabling CISPR25 Class 5 compliance without extra filtering
Dedicated fault pin with latch	Open-drain FAULT asserts low and holds until reset via EN toggle; reports LED short (to battery/ground), open, OCP, and thermal events
Configurable thermal derating	NTC-based remote sensing allows precise junction temperature tracking and linear current reduction before thermal shutdown (155°C–185°C)
Wettable flank QFN-19 package	Enables automated optical inspection of solder joints and improves mechanical reliability under automotive thermal cycling

Applications

Driver Monitoring Systems (DMS)

IR Illumination for Automotive Cameras

Use Scenario: Real-time cabin monitoring using NIR illumination synchronized with camera frame rate (30/60/120fps).

IC Role / Device Role / Timing Role: Constant-current IR LED driver with 1ms dimming on-time limit and fast transient response to match exposure timing.

Use Value: Ensures ASIL-B compliant eye safety while delivering stable 3A peak current for high-SNR imaging in low-light conditions.

Use Scenario: Night-vision assist for forward-facing ADAS cameras operating under 12V–42V vehicle supply.

IC Role / Device Role / Timing Role: Synchronous buck-boost LED driver supporting variable LED string voltage (e.g., 3× 3V LEDs = 9V) across wide input range.

Use Value: Maintains >87% efficiency at 2A output even at 6V input, minimizing thermal load in confined camera housings.

Surveillance Systems

Automotive Occupant Detection

Use Scenario: Outdoor security cameras requiring long-range IR illumination with EMI immunity in industrial environments.

IC Role / Device Role / Timing Role: High-efficiency IR driver with CISPR25 Class 5 radiated/conducted EMI performance and 40V load-dump tolerance.

Use Value: Eliminates need for external EMI filters, reducing system cost and board space while meeting stringent EMC standards.

Use Scenario: Seat occupancy and posture sensing using structured IR illumination and time-of-flight (ToF) sensors.

IC Role / Device Role / Timing Role: Precision current source with ultra-low jitter dimming control and fault-latched diagnostics for functional safety.

Use Value: Enables deterministic 1ms illumination pulses for accurate ToF depth mapping, with built-in fault reporting for ISO 26262 compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ7231GLE-D30-AEC1-Z	Same IC, factory-trimmed for 3ms dimming on-time limit instead of 1ms	Suitable for longer-exposure DMS or lower-frame-rate surveillance where 1ms is unnecessarily restrictive	Select D30 if system-level eye safety analysis permits longer on-time; retains identical pinout, thermal, and EMC behavior
MPQ7231GLE-D50-AEC1-Z	Same IC, factory-trimmed for 5ms dimming on-time limit	Used in non-critical illumination tasks (e.g., rear-seat IR lighting) where ASIL requirements are relaxed	Choose D50 only when functional safety certification scope excludes strict on-time constraints; otherwise D10 remains optimal for DMS

Compared with MPQ7231GLE-D30-AEC1-Z and MPQ7231GLE-D50-AEC1-Z, the D10 variant provides the tightest dimming on-time limit (1ms), making it the sole choice for ASIL-B-compliant driver monitoring systems where instantaneous irradiance control is mandatory for retinal safety.

Availability

MPQ7231GLE-D10-AEC1-Z is available at Aetrix Electronics and suitable for automotive driver monitoring systems (DMS), IR illumination for ADAS cameras, surveillance systems, and occupant detection modules requiring stable component supply, AEC-Q100 qualification, and eye-safety compliance.

Supply support for MPQ7231GLE-D10-AEC1-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 power management ICs, with core expertise in DC/DC conversion, LED drivers, and motor control solutions for automotive, industrial, and consumer markets.

The MPQ7231 belongs to MPS's MPSafe™ automotive-grade LED driver product line, engineered specifically for functional safety-critical infrared illumination in driver monitoring and ADAS applications-with integrated eye safety features, fault diagnostics, and AEC-Q100 Grade 1 qualification.

FAQ

What is the purpose of the IREF pin, and how does it configure buck vs. buck-boost mode?

The IREF pin sets topology mode via external resistor value: ≥14.7kΩ selects buck mode (3A peak), ≤9.09kΩ selects buck-boost mode (2.4A peak). It also sources NTC current at 50× (buck) or 5× (buck-boost) its reference current, enabling precise thermal derating scaling. An open or short on IREF forces latch-off and FAULT assertion.

How does the 1ms dimming on-time limit (D10 variant) enforce eye safety?

The D10 variant has factory-trimmed internal circuitry that hard-limits LED drive duration to 1ms per pulse, regardless of external DIM signal width-ensuring compliance with IEC 62471 photobiological safety thresholds for Class 1 LED devices. This eliminates software dependency and guarantees ASIL-B alignment in DMS implementations.

Can MPQ7231GLE-D10-AEC1-Z drive two 3V IR LEDs in series from a 12V supply?

Yes-in buck mode, with 6V total LED forward voltage, the device delivers up to 3A peak current at >90% efficiency. The 2.4MHz switching frequency and integrated low-R_DS(ON) MOSFETs minimize losses, while the 1ms on-time limit ensures safe pulsed operation. Layout must prioritize low-inductance PGND and SW node routing.

What protections are included, and how do they behave during fault conditions?

Protections include LED short-to-battery/ground, LED open, over-current (latch-off), thermal derating, thermal shutdown (155°C–185°C), and VIN UVLO/OVP. All faults assert the open-drain FAULT pin low and latch until EN is cycled. No auto-retry occurs-system-level reset is required to restore operation.

Does the MPQ7231GLE-D10-AEC1-Z require an external current-sense resistor?

No-it integrates a precision current-sense element, eliminating the need for an external shunt resistor. This reduces BOM cost, PCB area, and power loss while maintaining ±5% LED current accuracy across temperature (−40°C to +125°C ambient) and input voltage (6V–42V).

How does frequency spread spectrum (FSS) improve EMC performance?

FSS modulates switching frequency by ±10% around 2.4MHz (buck) or 1.25MHz (buck-boost), spreading energy across a bandwidth instead of concentrating at discrete harmonics. This reduces peak conducted/radiated emissions by >10dB, enabling CISPR25 Class 5 compliance without additional EMI filters or shielding.

What is the role of the NTC pin, and how is thermal derating implemented?

The NTC pin connects to a negative temperature coefficient thermistor network. As temperature rises, NTC resistance drops, lowering V_NTC; when V_NTC falls below 0.37V, thermal derating begins-linearly reducing LED current until thermal shutdown at 155°C–185°C. Recovery occurs when V_NTC exceeds 0.48V.

MPQ7231GLE-D10-AEC1-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MPSafe™

Package/Case:: 19-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Down (Buck), Step-Up (Boost)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 6V

Voltage - Supply (Max):: 42V

Voltage - Output:: -

Current - Output / Channel:: 2.4A, 3A

Frequency:: 1.25MHz, 2.4MHz

Dimming:: Analog, PWM

Applications:: General Purpose

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 19-QFN (3x4)

MPQ7231GLE-D10-AEC1-Z FAQ

1.How can I place an order for MPQ7231GLE-D10-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ7231GLE-D10-AEC1-Z 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 MPQ7231GLE-D10-AEC1-Z reliable?

The price and inventory of MPQ7231GLE-D10-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ7231GLE-D10-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ7231GLE-D10-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ7231GLE-D10-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ7231GLE-D10-AEC1-Z?

MPQ7231GLE-D10-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ7231GLE-D10-AEC1-Z 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 MPQ7231GLE-D10-AEC1-Z?

For technical support, including MPQ7231GLE-D10-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ7231GLE-D10-AEC1-Z requirements.

6.How does Aetrix verify that MPQ7231GLE-D10-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ7231GLE-D10-AEC1-Z 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 MPQ7231GLE-D10-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ7231GLE-D10-AEC1-Z?

All MPQ7231GLE-D10-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ7231GLE-D10-AEC1-Z, 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 MPQ7231GLE-D10-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ7231GLE-D10-AEC1-Z:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…