My Inquiry
My Account
Monolithic Power Systems Inc. MPQ7231GLE-D50-AEC1-P
- Part No.:
- MPQ7231GLE-D50-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 19-PowerVFQFN
- Datasheet:
-
MPQ7231GLE-D50-AEC1-P.pdf
- Description:
- MPSAFETM 42V, 3A BUCK OR 2.4A BU
- Quantity:
- Payment:
- Shipping:
Inventory:500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ7231GLE-D50-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fixed-frequency synchronous IR LED driver configurable as buck (3A peak) or buck-boost (2.4A peak), featuring integrated 44mΩ/40mΩ MOSFETs, 5ms factory-trimmed dimming on-time limit, and eye-safety current limiting for automotive driver monitoring systems.
For engineers reviewing the MPQ7231GLE-D50-AEC1-P datasheet, MPQ7231GLE-D50-AEC1-P pinout, MPQ7231GLE-D50-AEC1-P application, or MPQ7231GLE-D50-AEC1-P equivalent, this device supports 10Hz–2kHz PWM dimming, ASIL-compliant thermal derating via NTC, and CISPR25 Class 5 EMI compliance in QFN-19 (3mm×4mm) wettable flank packaging.
Technical Context
The MPQ7231 operates in constant-current hysteretic control mode with no loop compensation required, delivering ultra-fast transient response for pulsed IR illumination. Its dual-mode topology selection (buck vs. buck-boost) is determined by external resistor value at IREF (≥14.7kΩ or ≤9.09kΩ), enabling flexible LED string voltage matching across 6V–42V input range.
Eye safety is enforced through hardware-limited dimming on-time (5ms for D50 variant), LED current threshold detection (800–950mA cut-off), and fault latching on LED short/battery, LED open, over-current, or thermal events. Frequency spread spectrum (FSS) modulation reduces EMI peaks by ±10% around 2.4MHz (buck) or 1.25MHz (buck-boost).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 42V - supports wide automotive battery rail including load dump transients up to 42V. |
| Peak LED Current | 3A (buck) / 2.4A (buck-boost) - enables driving one or two high-power IR LEDs in automotive DMS. |
| Dimming On-Time Limit | 4ms to 6ms (D50 trim) - hardware-enforced eye safety per IEC 62471, eliminating software dependency. |
| Switching Frequency | 2.4MHz (buck) or 1.25MHz (buck-boost) with FSS - enables compact magnetics and meets CISPR25 Class 5 radiated/conducted EMI limits. |
| MOSFET RDS(ON) | 44mΩ HS-FET / 40mΩ LS-FET - minimizes conduction loss, improving system efficiency >90% at 3A output. |
| Thermal Protection | Latch-off thermal shutdown at 155°C–185°C with NTC-based derating - ensures safe operation under sustained high ambient conditions. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C TA) - qualified for under-hood automotive applications requiring functional safety support. |
Pinout & Package
MPQ7231GLE-D50-AEC1-P is housed in a QFN-19 (3mm × 4mm) package with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NTC | Remote temperature sensing input | Connects to NTC network for programmable thermal derating start point; protected against short-to-PGND/AGND faults. |
| 3 EN | Enable control | Pull ≥1V to enable; internal pull-down ensures default off-state; supports automatic startup when VIN/VCC exceed UVLO thresholds. |
| 4,13 VIN | Main power input | Accepts 6V–42V supply; requires low-ESR input capacitor and wide PCB trace to handle peak currents up to 3A. |
| 5,6,11,12 PGND | Power ground return | High-current return path for MOSFETs and SW node; must be thermally coupled to exposed pad for heat dissipation. |
| 7 BST | Bootstrap supply | Connects BST capacitor between SW and BST pins to drive HS-FET gate; resistor added to reduce SW ringing and improve EMI. |
| 8,9 SW | Switch node | Drives external inductor; requires minimal-area copper pour and tight layout to suppress high di/dt noise coupling. |
| 10 FAULT | Open-drain fault indicator | Asserts low on LED short (to battery/ground), open, OCP latch, or thermal shutdown; includes 300kΩ internal pull-up to VIN. |
| 14 INGND | Buck-boost topology ground reference | Isolated ground for DIM/EN/FAULT in buck-boost mode; tied to PGND/AGND in buck configuration. |
| 15 AGND | Analog reference ground | Reference for ISET/IREF/NTC circuits; connected externally to PGND via dedicated low-noise trace. |
| 16 VCC | Internal bias supply | Regulated ~5.1V output; requires ≥10µF X7R ceramic decoupling close to pin for stable gate drive and control logic. |
| 17 IREF | Mode selection & NTC current reference | Resistor value selects buck (≥14.7kΩ) or buck-boost (≤9.09kΩ); sets NTC current scaling (50× or 5× IREF). |
| 18 ISET | LED current programming | External resistor to ground sets average LED current; fault latches if shorted/open; supports 1.7–2.3A typical range. |
| 19 DIM | PWM dimming input | Accepts 10Hz–2kHz external PWM signal; minimum 100µs high pulse prevents false FAULT assertion; on-time limited to 5ms. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current-sense resistor | Eliminates external sense resistor, reducing BOM count and board space while maintaining ±5% LED current accuracy. |
| Configurable thermal derating | NTC-based current reduction starting at user-defined junction temperature, supporting ASIL-B functional safety requirements. |
| Dual-mode topology selection | Hardware-configured buck or buck-boost via single IREF resistor - avoids firmware dependencies and improves system robustness. |
| Wettable flank QFN-19 package | Enables automated optical inspection of solder joints, critical for zero-defect automotive manufacturing standards. |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage reports aligned with ISO 26262 ASIL-B development process. |
Applications
| Driver Monitoring Systems (DMS) | IR Illumination for Automotive Cameras |
|---|---|
|
Use Scenario: Real-time cabin occupant tracking using near-infrared illumination synchronized with camera frame rate. IC Role / Device Role / Timing Role: Constant-current IR LED driver with 30fps/60fps/120fps PWM dimming compatibility and hardware-enforced 5ms on-time limit. Use Value: Enables ASIL-compliant eye safety without software intervention, meeting IEC 62471 Risk Group 1 classification for automotive interior lighting. |
Use Scenario: Night-vision enhancement for ADAS front/rear cameras under low-light conditions. IC Role / Device Role / Timing Role: High-efficiency synchronous buck-boost driver powering dual-LED arrays across varying battery voltages (9V–16V). Use Value: Delivers >90% efficiency at 2.4A peak, reducing thermal load on camera housing and extending LED lifetime in sealed enclosures. |
| Surveillance Systems | Automotive In-Cabin Gesture Recognition |
|
Use Scenario: Covert IR illumination for security cameras operating in total darkness with minimal EMI impact on adjacent RF modules. IC Role / Device Role / Timing Role: CISPR25 Class 5 compliant driver with frequency spread spectrum and optimized PCB layout guidance. Use Value: Passes conducted/radiated emissions testing without shielding or ferrites, lowering system cost and design cycle time. |
Use Scenario: Low-latency hand-gesture detection using pulsed IR illumination synchronized to time-of-flight sensor timing windows. IC Role / Device Role / Timing Role: Ultra-fast hysteretic control architecture with sub-100ns minimum on/off times for precise pulse shaping. Use Value: Eliminates need for external loop compensation components, reducing solution size and enabling <10mm² total footprint. |
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-P | Factory-trimmed 3ms dimming on-time limit instead of 5ms; identical electrical specs and pinout. | Suitable for systems requiring shorter exposure duration, e.g., high-speed gesture recognition where motion blur must be minimized. | Select D30 when 3ms hardware limit aligns with optical system integration requirements and safety certification scope. |
| MPQ7231GLE-D10-AEC1-P | Factory-trimmed 1ms dimming on-time limit; otherwise electrically identical to D50 variant. | Targeted at ultra-low-energy IR illumination for battery-powered cabin sensors with strict duty-cycle constraints. | Choose D10 only when 1ms hard limit is mandated by optical design or regulatory test plan - not for general-purpose use. |
Compared with MPQ7231GLE-D30-AEC1-P and MPQ7231GLE-D10-AEC1-P, the D50 variant provides the longest factory-set dimming on-time (5ms), maximizing photon flux per pulse for long-range DMS applications while retaining identical thermal, EMI, and functional safety performance.
Availability
MPQ7231GLE-D50-AEC1-P is available at Aetrix Electronics and suitable for automotive driver monitoring systems, IR illumination for ADAS cameras, and in-cabin surveillance applications requiring stable component supply, AEC-Q100 qualification, and functional safety documentation.
Supply support for MPQ7231GLE-D50-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 for automotive, industrial, and consumer markets, with global manufacturing and quality certifications including IATF 16949.
The MPQ7231 belongs to MPS's MPSafe™ functional safety product line, designed specifically for ASIL-B compliant automotive subsystems requiring hardware-enforced safety mechanisms, diagnostic coverage, and certified development processes.
FAQ
What is the purpose of the IREF pin, and how does it affect topology selection?
The IREF pin configures buck or buck-boost operation via external resistor value: ≥14.7kΩ selects buck mode (3A peak), ≤9.09kΩ selects buck-boost mode (2.4A peak). It also sets NTC current scaling (50× or 5× IREF), directly linking thermal derating behavior to topology choice.
How does the 5ms dimming on-time limit (D50 variant) enforce eye safety?
The 5ms hardware limit is factory-trimmed into the die and cannot be overridden by software or external signals. It caps maximum IR exposure per pulse, ensuring compliance with IEC 62471 photobiological safety thresholds for Risk Group 1 classification in automotive cabin environments.
Can MPQ7231GLE-D50-AEC1-P drive more than two IR LEDs?
No - the device is specified for one or two series-connected IR LEDs. Driving three or more exceeds the 2.4A buck-boost peak current capability and violates the VOUT_UVP threshold (1.35V min) during low-current regulation, risking unstable operation.
What protection features are latched versus auto-recovering?
Over-current protection (OCP), LED open, LED short-to-battery/ground, and thermal shutdown trigger latched FAULT assertion requiring EN pin reset. UVLO, UVP, and OTP deglitch (20μs) and recover automatically once fault condition clears.
Is the QFN-19 package compatible with standard reflow profiles for automotive-grade assemblies?
Yes - the QFN-19 (3mm×4mm) with wettable flanks supports IPC/JEDEC J-STD-020D reflow profiles up to 260°C peak, and its exposed thermal pad is rated for 3.9W continuous power dissipation at 25°C ambient per JEDEC JESD51-7 4-layer board guidelines.
Does the MPQ7231 support analog dimming in addition to PWM?
No - dimming is exclusively PWM-controlled via the DIM pin. Analog dimming is not supported; ISET sets only the average current level, while brightness is controlled solely by external PWM duty cycle within 10Hz–2kHz range.
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 rather than concentrating it at discrete harmonics. This reduces peak radiated/conducted emissions by up to 10dB, enabling CISPR25 Class 5 compliance without additional filtering.
MPQ7231GLE-D50-AEC1-P 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:
- Camera Flash
- 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-D50-AEC1-P FAQ
1.How can I place an order for MPQ7231GLE-D50-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ7231GLE-D50-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 MPQ7231GLE-D50-AEC1-P reliable?
The price and inventory of MPQ7231GLE-D50-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 MPQ7231GLE-D50-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ7231GLE-D50-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ7231GLE-D50-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ7231GLE-D50-AEC1-P?
MPQ7231GLE-D50-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ7231GLE-D50-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 MPQ7231GLE-D50-AEC1-P?
For technical support, including MPQ7231GLE-D50-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ7231GLE-D50-AEC1-P requirements.
6.How does Aetrix verify that MPQ7231GLE-D50-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ7231GLE-D50-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 MPQ7231GLE-D50-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ7231GLE-D50-AEC1-P?
All MPQ7231GLE-D50-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ7231GLE-D50-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 MPQ7231GLE-D50-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ7231GLE-D50-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ7231GLE-D50-AEC1-P Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
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…
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…
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…
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…
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.
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.…
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…
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…
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…
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…
