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Monolithic Power Systems Inc. MPQ7231GLE-D10-AEC1-P
- Part No.:
- MPQ7231GLE-D10-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 19-PowerVFQFN
- Datasheet:
-
MPQ7231GLE-D10-AEC1-P.pdf
- Description:
- MPSAFETM 42V, 3A BUCK OR 2.4A BU
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
MPQ7231GLE-D10-AEC1-P from Monolithic Power Systems is a fixed-frequency, constant-current, AEC-Q100 Grade 1 qualified infrared LED driver supporting buck (3A peak) or buck-boost (2.4A peak) topologies. It integrates 44mΩ high-side and 40mΩ low-side MOSFETs, features factory-trimmed 1ms dimming on-time for ASIL-compliant eye safety, and operates across 6V–42V input for automotive IR illumination systems.
For engineers reviewing the MPQ7231GLE-D10-AEC1-P datasheet, MPQ7231GLE-D10-AEC1-P pinout, MPQ7231GLE-D10-AEC1-P application, or MPQ7231GLE-D10-AEC1-P equivalent, this device is selected for DMS and automotive camera IR drivers requiring precise current control, thermal derating via NTC, PWM dimming up to 2kHz, and functional safety–ready fault reporting.
Technical Context
The MPQ7231 uses constant-frequency hysteretic control-enabling sub-100ns transient response without loop compensation-and frequency spread spectrum (FSS) modulation at 2.4MHz (buck) or 1.25MHz (buck-boost) to reduce EMI peaks. Its dual-mode topology selection is determined by external resistor value at IREF (≤9.09kΩ for buck-boost, ≥14.7kΩ for buck).
Eye-safety compliance is implemented via hardware-enforced dimming on-time limits (1ms for D10 variant), LED current limiting, and integrated fault detection for LED short-to-battery/ground, open-circuit, over-current (latched), and thermal events. Remote NTC sensing enables configurable thermal derating starting at user-defined junction temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Buck (3A peak) or buck-boost (2.4A peak); mode selected by IREF resistor value |
| Input Voltage Range | 6V to 42V - supports 12V/24V automotive rails and load-dump transients up to 42V |
| Dimming On-Time Limit (D10) | 1ms ±0.2ms - factory-trimmed hardware limit enabling ASIL-B compliance in driver monitoring systems |
| Switching Frequency | 2.4MHz (buck) or 1.25MHz (buck-boost) with ±10% FSS - reduces EMI peak amplitude per CISPR25 Class 5 |
| MOSFET RDS(ON) | 44mΩ HS-FET / 40mΩ LS-FET - minimizes conduction loss, enabling >90% efficiency at 3A with 2 LEDs |
| Protection Features | Latched OCP, LED short/ground/open detection, thermal shutdown (155–185°C), and VIN UVLO (6V rising) |
| Package | QFN-19 (3mm × 4mm) with wettable flanks - supports automated optical inspection and high-density automotive PCB layout |
Pinout & Package
MPQ7231GLE-D10-AEC1-P 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; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NTC | Remote temperature sense input | Connects to NTC network for thermal derating; supports 5× IREF current sourcing in buck-boost mode |
| 3 EN | Enable control | Pull >1V to enable; internal pull-down ensures default-off state; supports automatic start-up when VIN/VCC exceed UVLO |
| 4,13 VIN | Main power input | 6V–42V supply rail; requires wide PCB trace and local CIN decoupling for transient robustness |
| 5,6,11,12 PGND | Power ground reference | High-current return path for MOSFETs and SW node; also serves as primary thermal dissipation path |
| 7 BST | Bootstrap supply | Connects BST–SW capacitor to bias HS-FET gate driver; series resistor reduces SW ringing and improves EMI |
| 8,9 SW | Switch node | Drives external inductor; requires minimized copper area to suppress radiated emissions and crosstalk |
| 10 FAULT | Open-drain fault indicator | Pulls low on LED short/ground/open, OCP latch, or thermal shutdown; includes 300kΩ internal VIN pull-up |
| 14 INGND | Buck-boost topology ground | Isolates logic grounds in buck-boost configuration; tied to PGND/AGND in buck mode |
| 15 AGND | Analog reference ground | Reference for ISET, IREF, DIM, and internal regulators; must be connected to PGND via low-inductance trace |
| 16 VCC | Internal bias supply | 5.1V regulated output; requires ≥10µF X7R ceramic capacitor close to pin for stability under switching load |
| 17 IREF | Mode selection & reference current | Resistor value selects topology (≤9.09kΩ → buck-boost; ≥14.7kΩ → buck); VIREF = 0.57V post-detection |
| 18 ISET | LED current programming | External resistor to ground sets average LED current; fault latches if shorted or open |
| 19 DIM | PWM dimming control | Accepts 10Hz–2kHz PWM signal; minimum valid on-time is 100µs; hardware enforces 1ms max on-time (D10 trim) |
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 |
| AEC-Q100 Grade 1 qualification | Rated for -40°C to +150°C operation with full characterization - validated for front-end automotive camera modules |
| Configurable thermal derating | NTC-based junction temperature monitoring enables progressive current reduction before thermal shutdown occurs |
| Dedicated fault pin with latched protection | FAULT asserts low and remains latched until EN cycle reset - simplifies system-level fault recovery without MCU polling |
| Wettable flank QFN package | Enables automated AOI of solder joints - critical for zero-defect requirements in automotive production lines |
Applications
| Driver Monitoring Systems (DMS) | IR Illumination for Automotive Cameras |
|---|---|
|
Use Scenario: Real-time cabin occupancy and driver attention monitoring using near-IR illumination in low-light conditions. IC Role / Device Role / Timing Role: Constant-current IR LED driver with hardware-enforced 1ms on-time limit to meet IEC 62471 photobiological safety requirements. Use Value: Enables ASIL-B–compliant DMS designs without software-based timing supervision, reducing functional safety validation effort. |
Use Scenario: Active night-vision enhancement for forward-facing ADAS cameras operating under 0.1 lux ambient light. IC Role / Device Role / Timing Role: High-efficiency buck-mode driver powering two-series 850nm LEDs at 3A peak with 2.4MHz switching for minimal EMI impact on image sensor signals. Use Value: Delivers >92% efficiency at 13.5V input, reducing thermal load on compact camera housings and extending LED lifetime. |
| Surveillance Systems | Automotive In-Cabin Gesture Recognition |
|
Use Scenario: Outdoor security cameras requiring covert IR illumination up to 30m range with flicker-free 60fps video capture. IC Role / Device Role / Timing Role: Buck-boost configured driver supporting variable LED string voltage (6–18V) while maintaining 2.4A peak current and 1.25MHz FSS-switching. Use Value: Maintains consistent illumination intensity across battery voltage sag (9–16V), eliminating brightness drift during nighttime recording. |
Use Scenario: In-cabin hand-tracking systems using structured-light or time-of-flight sensors requiring synchronized, low-jitter IR pulses. IC Role / Device Role / Timing Role: Precision PWM-controlled driver with <100ns dimming edge jitter and hardware-limited on-time to prevent sensor saturation. Use Value: Enables sub-millimeter gesture resolution by eliminating LED overdrive-induced motion blur in ToF depth maps. |
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 1ms; otherwise identical electrical specs and pinout | Suitable for longer-exposure DMS or surveillance where higher radiant power per frame is acceptable | Select D30 when ASIL-B allows 3ms exposure; D10 required for strictest eye-safety compliance in driver-facing applications |
| TLC59284RTJR | 16-channel constant-current LED sink driver (not buck/buck-boost); max 120mA/channel; no integrated MOSFETs or thermal derating | Designed for low-power indicator LEDs, not high-intensity IR illumination; lacks AEC-Q100 qualification and fault latching | Not a functional replacement; only viable for non-safety-critical, low-current IR array biasing with external boost converter |
Compared with MPQ7231GLE-D30-AEC1-P, the D10 variant provides tighter eye-safety margin for driver-facing DMS; compared with TLC59284RTJR, it delivers 25× higher peak current, integrated power stage, and automotive-grade functional safety - making it the sole qualified solution for AEC-Q100 IR illumination subsystems.
Availability
MPQ7231GLE-D10-AEC1-P is available at Aetrix Electronics and suitable for automotive driver monitoring systems, IR camera illumination modules, and in-cabin gesture recognition systems requiring stable component supply, AEC-Q100 traceability, and long-term production continuity.
Supply support for MPQ7231GLE-D10-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 computing applications, with design centers in the US, China, and Taiwan.
The MPQ7231 belongs to MPS's MPSafe™ functional safety product line, engineered specifically for ASIL-compliant automotive lighting and sensing systems requiring hardware-enforced safety mechanisms and AEC-Q100 Grade 1 reliability.
FAQ
What is the purpose of the IREF pin, and how does it determine topology?
The IREF pin selects buck or buck-boost mode via an external resistor: ≤9.09kΩ configures buck-boost (2.4A peak), ≥14.7kΩ configures buck (3A peak). After detection, VIREF settles to 0.57V, and its current scales NTC sensing - 5× in buck-boost, 1× in buck mode - enabling accurate thermal derating across topologies.
How does the 1ms dimming on-time limit (D10 variant) enforce eye safety?
The 1ms limit is factory-trimmed into silicon and enforced in hardware - independent of firmware or external timing circuits. It caps maximum IR exposure per pulse to comply with IEC 62471 Risk Group 1 limits, enabling ASIL-B certification without software supervision or watchdog timers.
Can MPQ7231GLE-D10-AEC1-P drive three IR LEDs in series?
Yes, in buck-boost mode with appropriate inductor and output capacitor selection. At VIN = 13.5V and VLED = 9V (3× 3V LEDs), it delivers up to 1.2A continuous or 2.4A peak current. Efficiency remains >87% per typical curves, and output over-voltage protection triggers at 17–19V to safeguard the string.
What fault conditions cause the FAULT pin to assert and latch?
FAULT pulls low and latches on LED short-to-battery/ground, LED open-circuit, over-current (OCP), thermal shutdown (>155°C), or internal pin faults (ISET/IREF/NTC open or short). Latch persists until EN is cycled - ensuring fault persistence across brief supply interruptions.
How does frequency spread spectrum (FSS) improve EMC performance?
FSS modulates switching frequency by ±10% around 2.4MHz (buck) or 1.25MHz (buck-boost) at 15kHz rate, spreading energy across a bandwidth instead of concentrating at harmonics. This reduces peak radiated/conducted emissions by 5–10dB, helping pass CISPR25 Class 5 without added shielding or filtering.
Is the QFN-19 package compatible with standard reflow profiles?
Yes - the MPQ7231GLE-D10-AEC1-P uses JEDEC J-STD-020-compliant moisture sensitivity level 1 (MSL-1) packaging. Standard lead-free reflow profiles (peak 260°C, 20–40s above 217°C) are supported; wettable flanks ensure reliable solder joint inspection in automated AOI systems.
Does the device support analog dimming in addition to PWM?
No - MPQ7231GLE-D10-AEC1-P supports PWM dimming only, via the DIM pin (10Hz–2kHz range). Analog dimming is not implemented; LED current is set exclusively by the ISET resistor, and dimming is achieved by duty-cycle modulation of the switched output.
MPQ7231GLE-D10-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-D10-AEC1-P FAQ
1.How can I place an order for MPQ7231GLE-D10-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ7231GLE-D10-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-D10-AEC1-P reliable?
The price and inventory of MPQ7231GLE-D10-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-D10-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ7231GLE-D10-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ7231GLE-D10-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ7231GLE-D10-AEC1-P?
MPQ7231GLE-D10-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ7231GLE-D10-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-D10-AEC1-P?
For technical support, including MPQ7231GLE-D10-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ7231GLE-D10-AEC1-P requirements.
6.How does Aetrix verify that MPQ7231GLE-D10-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ7231GLE-D10-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-D10-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ7231GLE-D10-AEC1-P?
All MPQ7231GLE-D10-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ7231GLE-D10-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-D10-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ7231GLE-D10-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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