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Monolithic Power Systems Inc. MPQ3362GJ-AEC1-Z
- Part No.:
- MPQ3362GJ-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ3362GJ-AEC1-Z.pdf
- Description:
- IC LED DRV RGLTR PWM 4A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,834
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Product details
Overview
MPQ3362GJ-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified single-string boost LED driver IC for automotive backlighting, featuring 3V–36V input range, internal 40V/80mΩ MOSFET, 0.2V feedback threshold, up to 95% efficiency at 1MHz, and dual-mode dimming (PWM <2kHz / analog >5kHz) on a shared EN/DIM pin.
For engineers reviewing the MPQ3362GJ-AEC1-Z datasheet, MPQ3362GJ-AEC1-Z pinout, MPQ3362GJ-AEC1-Z application, or MPQ3362GJ-AEC1-Z equivalent, this device supports high-reliability automotive display systems requiring precise current regulation, open/short LED fault protection, thermal shutdown, and configurable 200kHz–2.2MHz switching frequency with external resistor or SYNC input.
Technical Context
The MPQ3362GJ-AEC1-Z employs peak current mode control with slope compensation to stabilize duty cycles above 50%, enabling robust operation across wide VIN (3V–36V) and VOUT (up to 36V) ranges. Its internal error amplifier (250μA/V transconductance) interfaces with a COMP pin RC network for loop optimization.
Dimming mode selection is determined solely by applied signal frequency on EN/DIM: sub-2kHz triggers PWM dimming (hard-switched enable/disable), while >5kHz enables analog dimming via duty-cycle-dependent current scaling. OVP sensing occurs independently via dedicated OVP pin with 1.18V threshold and 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 36V - supports direct connection to automotive battery (9V–16V nominal) and extended cold-crank (down to 3V) without external pre-regulator. |
| Output Voltage Capability | Up to 36V - sufficient to drive 10× white LEDs in series (3.2V each) with margin for forward voltage variation and temperature drift. |
| Feedback Threshold | 200mV ±4mV - low reference reduces I²R loss in RFB sense resistor, improving efficiency and thermal performance in high-current LED strings. |
| Switching Frequency Range | 200kHz to 2.2MHz - adjustable via ROSC resistor or external SYNC signal; higher frequencies allow smaller magnetics and reduced EMI filtering area. |
| Peak Switch Current Limit | 4A typical - sets maximum inductor peak current; protects internal 80mΩ MOSFET during startup, short-circuit, or overtemperature events. |
| Shutdown Quiescent Current | 0.3μA - enables ultra-low power-off state for always-on automotive modules meeting ISO 16750-2 quiescent current requirements. |
| OVP Threshold | 1.18V - triggers shutdown when OVP pin voltage exceeds threshold, protecting against open-LED fault conditions with fast recovery upon voltage drop to 1.08V. |
Pinout & Package
MPQ3362GJ-AEC1-Z is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for space-constrained automotive PCBs with θJA = 100°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drain of internal N-MOSFET; connects directly to boost inductor and rectifier diode; carries high dv/dt and peak currents up to 4A. |
| 2 VIN | Power input | Main supply input (3V–36V); powers internal bias rails and gate driver; supports bootstrapped operation when tied to output. |
| 3 COMP | Error amplifier output | Connects to external RC compensation network; sets loop stability, transient response, and phase margin for current regulation. |
| 4 EN/DIM | Enable & dimming control | Single-pin dual-function: logic-level enable/disable (20ms low pulse) and frequency-selectable dimming (PWM <2kHz / analog >5kHz). |
| 5 OSC/SYNC | Frequency configuration | Accepts ROSC resistor (20kΩ–100kΩ) for fSW setting or external clock (200kHz–2.2MHz) for synchronization with system timing sources. |
| 6 FB | Current-sense feedback | Monitors voltage across external RFB; regulates LED current to ILED = 200mV / RFB; includes short-to-GND protection at 50mV. |
| 7 OVP | Open-LED protection sense | Dedicated pin for resistive divider monitoring of output voltage; triggers shutdown if OVP >1.18V, preventing overvoltage stress on LEDs. |
| 8 GND | Power and signal ground | Common return path for VIN, SW, COMP, EN/DIM, OSC/SYNC, FB, and OVP; requires low-impedance layout to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Analog + PWM dimming on one pin | Eliminates need for separate control lines; simplifies MCU GPIO usage and reduces BOM count in space-limited instrument clusters. |
| Integrated 80mΩ/40V MOSFET | Reduces external component count and PCB footprint; eliminates gate driver and discrete FET selection effort while maintaining 95% efficiency at 1MHz. |
| Open/short LED and short-FB protection | Prevents catastrophic failure during manufacturing defects or field faults; enables fail-safe behavior required for ASIL-B compliant lighting systems. |
| Thermal shutdown with 20°C hysteresis | Protects die under sustained overload or poor heatsinking; resumes operation automatically after cooldown, avoiding latching faults in intermittent thermal events. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C junction operation; meets automotive reliability, ESD (HBM ±2kV), and lifetime stress requirements per JESD47. |
Applications
| Automotive Instrument Cluster Backlighting | Center Stack LCD Display Lighting |
|---|---|
|
Use Scenario: Driving 6–12 white LEDs behind TFT-LCD in digital instrument clusters with variable brightness and ambient light adaptation. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current with analog dimming synchronized to MCU PWM timer outputs. Use Value: Enables smooth 0–100% brightness transitions without visible flicker (via >5kHz analog dimming), meeting UNECE R121 photometric stability requirements. |
Use Scenario: Powering middle-size (7–10 inch) infotainment LCD backlights in vehicles with start-stop functionality and wide input voltage range. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering stable current despite 6–18V battery fluctuations, using UVLO and soft-start for cold-crank immunity. Use Value: Maintains consistent luminance during engine cranking (VIN ≥3V), eliminating display blackout and supporting ISO 16750-2 Pulse 4a compliance. |
| Automotive Head-Up Display (HUD) Illumination | Commercial Vehicle Rearview Mirror Displays |
|
Use Scenario: Driving high-brightness monochrome LED arrays in HUD combiner optics where thermal management and EMI are critical constraints. IC Role / Device Role / Timing Role: Precision current source with programmable fSW (1.5MHz) to minimize magnetic component size and reduce conducted EMI in proximity to RF receivers. Use Value: Achieves >92% efficiency at 1.5MHz with 4.7μH inductor, reducing thermal load on compact HUD PCBs and easing EMC filter design. |
Use Scenario: Illuminating small-form-factor LCDs in rearview mirror assemblies exposed to extreme ambient temperatures (-40°C to +85°C). IC Role / Device Role / Timing Role: AEC-Q100 qualified LED driver providing reliable current regulation across full automotive temperature range with integrated thermal shutdown. Use Value: Guarantees no LED current drift beyond ±5% from -40°C to +125°C junction, ensuring consistent display contrast and readability in all climates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMYX/NOPB | External MOSFET required; 0.21V FB threshold; fixed 500kHz fSW; no integrated OVP pin. | Lacks dedicated OVP sensing and analog dimming; requires additional components for open-LED protection and dimming flexibility. | Preferred only when discrete FET selection is needed for >40V output or higher current scalability beyond 4A peak. |
| TPS61165DRVR | Fixed 1.2MHz fSW; 0.2V FB; no OVP pin; supports only PWM dimming (no analog mode); lower 2.7V VIN min. | Not AEC-Q100 qualified; lacks UVLO hysteresis, thermal shutdown hysteresis, and short-FB protection. | Suitable for non-automotive industrial displays but not for ASIL-compliant systems requiring fault coverage and automotive qualification. |
Compared with LM3409QMYX/NOPB and TPS61165DRVR, MPQ3362GJ-AEC1-Z delivers integrated protection (OVP, short-FB, thermal hysteresis), dual-dimming capability on one pin, and full AEC-Q100 Grade 1 validation-reducing system-level validation effort and enabling single-chip solutions for automotive display lighting.
Availability
MPQ3362GJ-AEC1-Z is available at Aetrix Electronics and suitable for automotive instrument cluster backlighting, center stack LCD displays, and head-up display illumination requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MPQ3362GJ-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 drivers for automotive, industrial, and consumer markets.
The MPQ3362 belongs to MPS's automotive-grade LED driver product line, designed specifically for high-reliability, thermally constrained backlighting applications requiring AEC-Q100 qualification, integrated protection, and flexible dimming control.
FAQ
What dimming modes does MPQ3362GJ-AEC1-Z support, and how are they selected?
The MPQ3362GJ-AEC1-Z supports both PWM dimming (<2kHz) and analog dimming (>5kHz) on the same EN/DIM pin. Selection is fully automatic based on input signal frequency: a 1kHz square wave enables PWM dimming (hard on/off switching), while a 10kHz signal enables analog dimming (continuous current scaling). No configuration register or external logic is required.
How is over-voltage protection implemented, and what external components are needed?
OVP is implemented via the dedicated OVP pin, which monitors output voltage through a resistive divider. When voltage at OVP exceeds 1.18V, the IC disables switching. Recovery occurs when OVP drops to 1.08V. External components include ROVP1 and ROVP2 (typically 100kΩ and 10kΩ) to set threshold 10–20% above nominal VOUT, per Equation (7) in the datasheet.
Can MPQ3362GJ-AEC1-Z operate with input voltage below 3V, such as during cold-crank transients?
No. The absolute minimum operating input voltage is 3V, and UVLO rising threshold is 2.5V (typical). Below 3V, the device ceases regulation and enters undervoltage lockout. It will not sustain operation at 2.7V or lower, making it unsuitable for systems requiring sub-3V cold-crank support without upstream pre-buck.
What is the purpose of the COMP pin, and how is its compensation network designed?
The COMP pin is the output of the internal error amplifier and interfaces with an external RC network to stabilize the current regulation loop. Compensation uses a series RC (RCOMP, CCOMP) plus parallel CP to counteract the boost converter's right-half-plane zero and power stage pole. Design equations for RCOMP, CCOMP, and CP are provided in the datasheet (pages 12–13) based on LED load, inductance, and target crossover frequency.
Does MPQ3362GJ-AEC1-Z support synchronization to an external clock, and what frequency range is accepted?
Yes. The OSC/SYNC pin accepts an external clock signal between 200kHz and 2.2MHz to synchronize switching frequency with system timing sources (e.g., MCU timers or other power stages), reducing beat-frequency EMI. The external clock must be rail-to-rail CMOS-compatible and free of excessive jitter to maintain regulation accuracy.
How does short-FB protection work, and what failure condition triggers it?
Short-FB protection activates when FB voltage drops below 50mV for 20ms while COMP is saturated, indicating a shorted feedback resistor or direct FB-to-GND fault. Upon detection, the IC stops switching and holds COMP low. Normal operation resumes only after the short is removed and FB voltage rises above 50mV for >100μs.
Is the TSOT23-8 package thermally adequate for 4A peak current in automotive environments?
Yes - the TSOT23-8 package achieves θJA = 100°C/W on a 4-layer PCB with proper copper pour and thermal vias. At 4A peak and 95% efficiency, power dissipation remains ≤0.8W, resulting in ~80°C junction rise above ambient (TA = 85°C), well within the 125°C max operating junction temperature and 170°C thermal shutdown threshold.
MPQ3362GJ-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 4A
- Frequency:
- 200kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MPQ3362GJ-AEC1-Z FAQ
1.How can I place an order for MPQ3362GJ-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3362GJ-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 MPQ3362GJ-AEC1-Z reliable?
The price and inventory of MPQ3362GJ-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 MPQ3362GJ-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ3362GJ-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3362GJ-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3362GJ-AEC1-Z?
MPQ3362GJ-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3362GJ-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 MPQ3362GJ-AEC1-Z?
For technical support, including MPQ3362GJ-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3362GJ-AEC1-Z requirements.
6.How does Aetrix verify that MPQ3362GJ-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ3362GJ-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 MPQ3362GJ-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ3362GJ-AEC1-Z?
All MPQ3362GJ-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3362GJ-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 MPQ3362GJ-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ3362GJ-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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