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Monolithic Power Systems Inc. MPQ3367GF-AEC1-P
- Part No.:
- MPQ3367GF-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MPQ3367GF-AEC1-P.pdf
- Description:
- 6 CHANNELS, MAX.150MA/CH,BOOST W
- Quantity:
- Payment:
- Shipping:
Inventory:2,607
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Product details
Overview
MPQ3367GF-AEC1-P from Monolithic Power Systems is a 6-channel, AEC-Q100 qualified boost WLED driver with I²C interface, designed for automotive and industrial LCD backlighting. It delivers up to 150mA per channel, achieves 15,000:1 PWM dimming ratio at ≤200Hz, and integrates a 100mΩ/50V internal MOSFET with peak-current-mode control for stable high-efficiency operation in 3.5V–36V input systems.
For engineers reviewing the MPQ3367GF-AEC1-P datasheet, MPQ3367GF-AEC1-P pinout, MPQ3367GF-AEC1-P application, or MPQ3367GF-AEC1-P equivalent, key selection considerations include its TSSOP28-EP package, 2.5% inter-channel current matching, programmable OVP/STH thresholds, phase-shifted PWM dimming for EMI reduction, and AEC-Q100 Grade 1 qualification for automotive display systems.
Technical Context
The MPQ3367GF-AEC1-P implements peak-current-mode PWM control with cycle-by-cycle current limiting and a stabilizing ramp to suppress subharmonic oscillation above 50% duty. Its six independent cathode-connected current sinks regulate LED string current via an external ISET resistor (1.2V reference), achieving ±2.5% matching across channels at 20mA–100mA.
Dimming is implemented through three modes-direct PWM, analog (via 8-bit DAC), and mix dimming-with mode selection via MIX/AD pin voltage or I²C register. Phase shift (60° for 6 channels, 90° for 4) eliminates audible noise and reduces inrush current during PWM dimming, while frequency spread spectrum (FSP pin) further improves EMI performance.
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 (≤36V) conditions. |
| Max Output Current/Ch | 150mA - enables driving high-brightness white LED strings (e.g., 6P12S) with headroom margin. |
| Current Matching Accuracy | ±2.5% - ensures uniform luminance across multi-string LCD backlights without per-channel calibration. |
| PWM Dimming Ratio | 15,000:1 at ≤200Hz - enables deep black-level control in infotainment displays under low ambient light. |
| Switching Frequency Range | 495kHz to 2.2MHz - selectable via resistor, I²C, or external clock to avoid AM band interference or optimize efficiency. |
| OVP Threshold Programmability | Adjustable via resistor divider on OVP pin - allows precise overvoltage protection tuning for varying LED string Vf and temperature drift. |
| Thermal Protection | 170°C shutdown with 20°C hysteresis - prevents thermal runaway in enclosed automotive bezels with limited airflow. |
Pinout & Package
The MPQ3367GF-AEC1-P is housed in a thermally enhanced TSSOP28-EP package (9.7mm × 4.4mm × 1.2mm) with exposed pad tied to AGND for improved θJA (32°C/W) and power dissipation (3.9W @ TA=25°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIM (Pin 5) | PWM brightness control input | Accepts 100Hz–20kHz PWM signal; triggers direct PWM dimming when MIX/AD is mid-level (0.5–0.8V). |
| MIX/AD (Pin 6) | Dimming mode select | 18μA current source; voltage level sets analog (≥1.0V), PWM (0.5–0.8V), or mix (≤0.3V) dimming mode. |
| FREQ/SYNC (Pin 7) | Switching frequency control | Resistor-to-GND sets fSW (495kHz–2.2MHz); external clock input enables synchronization to system timing. |
| EN (Pin 8) | Enable/disable control | Pull high ≥1.2V to start operation; pull low ≤0.4V to enter 1μA shutdown state. |
| SCL/PSE & SDA/PSE (Pins 9,10) | I²C interface + phase-shift enable | Standard I²C bus; pulled to 0.75–1.0V together to activate phase-shift function for noise suppression. |
| ISET (Pin 13) | LED current reference | 1.2V reference node; RISET = 24.9kΩ sets nominal 50mA/channel with ±2.5% matching. |
| LED1–LED6 (Pins 15–20) | Cathode current sinks | Each drives one LED string; unused pins (e.g., LED6 for 5-string config) must be grounded with ≤470pF capacitor for auto-detection. |
| FF (Pin 12) | Fault flag output | Open-drain active-low signal indicating OVP, OTP, LED open/short, or inductor short fault. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-dimming architecture | Hardware-selectable analog, PWM, and mix dimming - eliminates need for external MCU-based dimming logic in cost-sensitive automotive clusters. |
| Phase-shift PWM control | 60° inter-channel offset for 6-string operation - reduces peak input current by ~30% and eliminates audible coil whine in dash displays. |
| Programmable protection thresholds | OVP, LED short (STH), and thermal (OTP) thresholds set via external resistors - enables design flexibility across varying LED Vf and ambient temperature profiles. |
| High-efficiency power stage | 100mΩ/50V internal MOSFET with low-headroom current sensing - achieves >90% efficiency at 12V input, 40V output, 100mA × 6 strings. |
| AEC-Q100 Grade 1 qualification | -40°C to +125°C operating junction temperature - validated for front-panel automotive displays subject to extended thermal cycling and vibration. |
Applications
| Automotive Instrument Cluster | Center Stack Infotainment Display |
|---|---|
Use Scenario: Driving 4–6 white LED strings behind TFT-LCD in digital gauge cluster with variable ambient lighting. IC Role / Device Role / Timing Role: Primary WLED backlight controller with I²C-configurable dimming modes and phase-shifted PWM to eliminate audible noise during speed-dependent brightness adjustment. Use Value: Enables seamless 15,000:1 dimming range from daylight-readable to night-driving black levels without flicker or coil whine. | Use Scenario: Backlighting high-resolution 10.25" LCD in center console with touch interface and dynamic content. IC Role / Device Role / Timing Role: Constant-current LED driver with programmable OVP threshold to accommodate aging-related LED Vf drift and thermal derating. Use Value: Maintains consistent luminance uniformity across display lifetime using 2.5% current matching and auto-decrement at high temperature. |
| Automotive HUD Combiner Illumination | Industrial HMI Panel Display |
Use Scenario: Powering compact LED array for projection-based head-up display combiner glass requiring ultra-stable current. IC Role / Device Role / Timing Role: Precision current regulator with cycle-by-cycle limiting and disconnect control (SD pin) to isolate LED load during fault events. Use Value: Prevents single-point failure propagation in safety-critical HUD systems via fast OCP/OVP response (<7.7ms fault timer) and latch-off capability. | Use Scenario: Backlighting ruggedized 7" industrial panel in factory automation environment with wide temperature swings. IC Role / Device Role / Timing Role: AEC-Q100 qualified WLED driver operating from 24V DC supply with robust ESD (>7kV) and EMC resilience (spread-spectrum FSP). Use Value: Reduces BOM count by integrating 6-channel control, I²C interface, and fault reporting into single TSSOP28-EP package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3367GR-AEC1 | Same die, QFN-24 (4mm×4mm) package with 42°C/W θJA - lower thermal mass but requires more PCB area for thermal pad. | Better suited for space-constrained modules where height <0.8mm is critical; less suitable for high-power continuous operation without aggressive heatsinking. | Select GR variant when board layout prioritizes footprint over thermal headroom and peak power exceeds 2.5W. |
| LM3409QMHX/NOPB | Single-channel, external MOSFET, no I²C or multi-dimming - requires external current sense and MCU for dimming control. | Used in legacy designs with discrete channel control; lacks integrated phase shift, mix dimming, or AEC-Q100 Grade 1 validation. | Choose only when migrating legacy 1-channel designs or when full 6-channel integration is unnecessary. |
Compared with MPQ3367GR-AEC1, the GF variant offers superior thermal dissipation (3.9W vs. 2.97W) in TSSOP28-EP, while LM3409QMHX requires external components and firmware to replicate basic dimming functions - making MPQ3367GF-AEC1-P optimal for new AEC-Q100-compliant multi-string automotive displays.
Availability
MPQ3367GF-AEC1-P is available at Aetrix Electronics and suitable for automotive instrument clusters, center-stack infotainment displays, and industrial HMI panels requiring stable component supply, AEC-Q100 compliance, and high-ratio dimming capability.
Supply support for MPQ3367GF-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 analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and motor control solutions.
The MPQ3367 product line targets automotive-grade LCD backlighting, delivering integrated multi-channel WLED control with AEC-Q100 qualification, advanced dimming, and robust fault protection for safety-critical displays.
FAQ
What is the maximum allowable LED string voltage for MPQ3367GF-AEC1-P?
The device supports output voltages up to 50V on LEDx pins, with OVP threshold programmable via resistor divider on the OVP pin. Absolute maximum rating is +50V, but recommended operating limit is ≤45V to maintain reliability margin under transient conditions and temperature variation.
How does the phase-shift function reduce EMI in automotive applications?
By staggering the turn-on timing of LED channels (60° for 6 strings), the MPQ3367GF-AEC1-P spreads input current harmonics across multiple phases, lowering peak RMS current and reducing conducted EMI in the 150kHz–108MHz CISPR 25 band - critical for passing automotive EMC testing without added filtering.
Can MPQ3367GF-AEC1-P drive fewer than six LED strings?
Yes - unused LEDx pins (e.g., LED6 for five-string operation) must be connected to AGND with a 270pF capacitor (≤470pF) to enable automatic channel disable during startup. Alternatively, CH2:0 register bits can disable channels 2–6 via I²C without hardware modification.
What is the minimum PWM dimming frequency for 15,000:1 ratio operation?
The 15,000:1 dimming ratio is specified at FPWM ≤ 200Hz. At 200Hz, the minimum on-time is 7μs (corresponding to 0.0035% duty), below which the output voltage is regulated to 93% of the OVP threshold to maintain regulation integrity during deep dimming.
Is the I²C interface required to configure dimming modes?
No - dimming mode (analog, PWM, or mix) can be selected solely via MIX/AD pin voltage using external resistors. I²C is optional and used for advanced features like phase-shift enable, mix-dimming transfer point selection, and fault register readback.
Does MPQ3367GF-AEC1-P support automatic LED current derating at high temperature?
Yes - the device includes an optional LED current auto-decrement feature activated via register setting. When junction temperature exceeds threshold, LED current scales linearly down to zero at 150°C, protecting LEDs and optics from thermal degradation in sealed enclosures.
What is the purpose of the SD pin, and how is it used?
The SD pin is an external PMOS gate driver that disconnects VIN from the LED string during fault conditions (OVP, OTP, LED short). When not used, it must be left floating; when implemented, it requires an external PMOS between VIN and the boost converter input to enforce safe shutdown.
MPQ3367GF-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) 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:
- -
- Current - Output / Channel:
- 150mA
- Frequency:
- 2.2MHz
- Dimming:
- Analog, I2C, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
MPQ3367GF-AEC1-P FAQ
1.How can I place an order for MPQ3367GF-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3367GF-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 MPQ3367GF-AEC1-P reliable?
The price and inventory of MPQ3367GF-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 MPQ3367GF-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ3367GF-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3367GF-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3367GF-AEC1-P?
MPQ3367GF-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3367GF-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 MPQ3367GF-AEC1-P?
For technical support, including MPQ3367GF-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3367GF-AEC1-P requirements.
6.How does Aetrix verify that MPQ3367GF-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ3367GF-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 MPQ3367GF-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ3367GF-AEC1-P?
All MPQ3367GF-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3367GF-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 MPQ3367GF-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ3367GF-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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