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Monolithic Power Systems Inc. MPQ3326BGRE-AEC1-Z
- Part No.:
- MPQ3326BGRE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 24-VFQFN
- Datasheet:
-
MPQ3326BGRE-AEC1-Z.pdf
- Description:
- 16-CHANNEL, 80MA/CH, LED DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ3326BGRE-AEC1-Z from Monolithic Power Systems is a 16-channel AEC-Q100 Grade 1 LED driver IC for automotive lighting and instrument clusters, delivering up to 80mA per channel with independent 12-bit PWM and 6-bit analog dimming, I²C address configurability (10 options), and integrated LED open/short/over-temperature protection.
For engineers reviewing the MPQ3326BGRE-AEC1-Z datasheet, MPQ3326BGRE-AEC1-Z pinout, MPQ3326BGRE-AEC1-Z application, or MPQ3326BGRE-AEC1-Z equivalent, this device supports high-reliability automotive backlighting with synchronized refresh output, phase-shifted PWM to reduce EMI, and wettable flank QFN-24 packaging for automated optical inspection.
Technical Context
The MPQ3326B integrates sixteen matched current sinks with external ISET resistor programming, enabling precise per-channel LED current control across 4.5V–16V input. Its dual-dimming architecture separates analog amplitude scaling (6-bit) from PWM duty-cycle modulation (12-bit), allowing simultaneous brightness and contrast tuning without waveform distortion.
It implements cascaded I²C control via ADDR-pin resistor selection (10 addresses), fault-aware RFSH/FLT pin operation (refresh signal or active-low fault flag), and configurable protection thresholds-including user-selectable LED short voltage (2V/3V/4V/5V) and hiccup/latch-off response modes-optimized for automotive thermal and electrical transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - Supports direct connection to automotive battery rails including cold-crank (4.5V) and load-dump (16V) conditions. |
| Max Output Current/Ch | 80mA - Enables driving high-brightness LEDs in series-parallel arrays without external boost stages. |
| PWM Dimming Resolution | 12-bit (4096 steps) - Provides fine-grained flicker-free brightness control down to 0.025% duty cycle at 250Hz. |
| Analog Dimming Resolution | 6-bit (64 steps) - Allows linear current scaling for smooth low-end dimming without PWM artifacts. |
| I²C Address Options | 10 unique addresses - Permits daisy-chaining up to 10 devices on one bus for large-area display backlighting. |
| Thermal Shutdown Threshold | 170°C with 20°C hysteresis - Ensures safe recovery after transient overloads in enclosed automotive enclosures. |
| Package | QFN-24 (4mm × 4mm) with wettable flanks - Facilitates solder joint inspection and improves thermal dissipation in space-constrained modules. |
Pinout & Package
MPQ3326BGRE-AEC1-Z is housed in a 4mm × 4mm QFN-24 package with wettable flanks, optimized for automotive reflow and AOI. Pin 14 is GND; pins 7–23 are dedicated LED cathode current sinks (LED1–LED16); pin 6 sets full-scale current via external resistor; pins 1 and 2 serve dual-function RFSH/FLT and EN control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RFSH/FLT | Refresh output / Fault indicator | Configurable as synchronized LCD refresh signal (fREFRESH = fPWM × 127500 / FRFSH) or open-drain fault flag pulled low on LED open/short/OTP. |
| 2 EN | Global enable input | Active-high logic enables all 16 channels; used for system-level power sequencing and sleep/wake control. |
| 3 SCL, 4 SDA | I²C interface | Standard bidirectional I²C bus (10–1000kHz) supporting register read/write for dimming, protection, and configuration. |
| 5 ADDR | I²C address select | Voltage divider with RADDR sets lower 4 bits of 7-bit I²C address (0x30–0x39), enabling multi-device addressing. |
| 6 ISET | Current reference input | Connects to external resistor to set full-scale LED current (e.g., 24kΩ → 50mA, 15kΩ → 80mA). |
| 7–23 LED1–LED16 | LED string cathode sinks | 16 independent current-sink outputs; each drives one LED string cathode with ≤480mV headroom at 80mA. |
| 24 VIN | Main power input | Accepts 4.5V–16V supply; requires local ceramic decoupling to suppress switching noise and support transient loads. |
Key Features
| Feature | Design Value |
|---|---|
| Separated PWM + analog dimming | Independent 12-bit PWM timing and 6-bit current scaling per channel eliminate trade-offs between resolution and smoothness. |
| Configurable phase shift | 40μs inter-channel delay reduces peak input current and conducted EMI in multi-string applications. |
| Programmable slew rate | Adjustable ILED rise/fall time (5/10/20μs) minimizes dv/dt-induced noise during PWM transitions. |
| LED short protection threshold | Selectable 2V/3V/4V/5V detection level adapts to varying forward voltage tolerances across LED batches. |
| Fault reporting granularity | Dedicated per-channel open/short status registers (CHxO/CHxS) enable targeted diagnostics and recovery in safety-critical systems. |
Applications
| Automotive Instrument Clusters | Automotive Center Stack Displays |
|---|---|
|
Use Scenario: Backlighting of TFT-LCD gauges with variable ambient light and driver-view requirements. IC Role / Device Role / Timing Role: 16-channel current sink providing independent dimming per segment (e.g., speedometer, tachometer, warning icons) with synchronized RFSH output for display controller timing alignment. Use Value: Eliminates need for discrete current sources and external PWM generators while meeting AEC-Q100 Grade 1 temperature (-40°C to +125°C) and ESD (HBM Class 1C) requirements. |
Use Scenario: Edge-lit backlight for infotainment center displays requiring uniform luminance and dynamic contrast. IC Role / Device Role / Timing Role: Drives 16 parallel LED strings with phase-shifted PWM to reduce input ripple and EMI, using I²C to adjust zones based on content metadata. Use Value: Achieves <±3% current matching across channels and supports real-time dimming updates via 100kHz I²C, enabling HDR-like local dimming behavior. |
| Automotive Exterior Lighting Control | Commercial Vehicle Digital Dashboards |
|
Use Scenario: Adaptive daytime running lights (DRL) with sequential turn indication and fault-tolerant operation. IC Role / Device Role / Timing Role: Configured with latch-off mode (LATCH=1) to disable failed strings while maintaining illumination on remaining channels; RFSH/FLT signals faults to MCU for CAN-based diagnostics. Use Value: Meets ISO 11452-2/ISO 7637-2 immunity requirements through integrated UVLO, OTP, and robust I/O protection-no external supervision circuitry needed. |
Use Scenario: Multi-zone dashboard backlighting in heavy-duty trucks with extended temperature cycling and vibration exposure. IC Role / Device Role / Timing Role: Operates in hiccup mode (LATCH=0) to auto-recover from intermittent LED opens caused by mechanical stress; wettable flank QFN ensures solder joint reliability under thermal shock. Use Value: Delivers >10-year operational life at 125°C junction temperature with validated MTBF >1M hours per AEC-Q100 stress testing protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS31FL3728-QFLS4-TR | 18-channel, 40mA max/channel, no analog dimming, only 8-bit PWM; I²C address fixed (0x60–0x63), no ADDR pin. | Lacks separated dimming and phase shift; suited for non-automotive consumer displays where cost outweighs precision. | Choose IS31FL3728 if budget constraints dominate and 40mA/channel suffices; avoid for AEC-Q100 or >50mA automotive use. |
| TLC5947IPWPR | 24-channel, 120mA max/channel, 12-bit PWM only, no analog dimming; SPI interface, no I²C; no integrated fault reporting. | Requires external fault monitoring; higher channel count but no automotive qualification or wettable flank package. | Prefer TLC5947 for industrial signage needing >16 channels and SPI integration; not suitable for ASIL-B systems due to missing diagnostics. |
Compared with IS31FL3728-QFLS4-TR and TLC5947IPWPR, MPQ3326BGRE-AEC1-Z uniquely combines AEC-Q100 Grade 1 qualification, per-channel analog+PWM dimming, programmable protection, and wettable flank packaging-making it the only option qualified for functional safety-compliant automotive backlighting without external supervision.
Availability
MPQ3326BGRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive instrument clusters, center stack displays, and exterior lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MPQ3326BGRE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ3326B belongs to MPS's automotive-grade LED driver product line, engineered specifically for AEC-Q100-compliant vehicle interior and exterior lighting applications demanding high channel density, precise dimming control, and robust fault handling.
FAQ
What is the maximum number of MPQ3326BGRE-AEC1-Z devices that can be cascaded on a single I²C bus?
Up to 10 devices can be cascaded using the ADDR pin resistor to configure unique I²C addresses (0x30–0x39). Each device requires its own RADDR resistor network; shared ADDR lines are not supported. This enables scalable backlighting for large-format displays without I²C bus contention.
How does the RFSH/FLT pin function when FLTEN = 0 versus FLTEN = 1?
When FLTEN = 0, RFSH/FLT outputs a synchronized rectangular refresh signal (fREFRESH = fPWM × 127500 / FRFSH[9:0]); when FLTEN = 1, it acts as an active-low open-drain fault flag pulled low on LED open/short or over-temperature events. The pin remains high during normal operation in fault mode until a fault occurs.
Can MPQ3326BGRE-AEC1-Z drive LEDs in series configurations?
No-the MPQ3326B is a constant-current sink with 480mV headroom at 80mA; it drives individual LED cathodes, requiring LEDs to be arranged in parallel strings (e.g., 16 strings of 1–3 LEDs in series). For higher Vf strings, an external boost converter must supply VIN ≥ total LED Vf + 480mV.
What is the purpose of the 40μs phase shift feature, and how is it enabled?
The 40μs inter-channel phase shift reduces peak input current and conducted EMI by staggering PWM rising edges across all 16 channels. It is enabled by setting the PS_EN bit (bit 0 of DEV_CON register 0x01) to 1; no external components are required.
Does MPQ3326BGRE-AEC1-Z support both hiccup and latch-off fault responses?
Yes-via the LATCH bit (bit 1 of DEV_CON register 0x01). When LATCH = 0, the device enters hiccup mode (32μs retry every 1ms); when LATCH = 1, it latches off until power cycle or EN toggle. This allows flexible safety response tuning for different failure severity levels.
What is the minimum external ISET resistor value for 80mA operation, and how is it calculated?
For 80mA full-scale current, use RISET = 15kΩ (per datasheet Table "LED current 2"). VISET is 1.2V nominal; calculation: RISET = VISET / ILED_MAX = 1.2V / 0.08A = 15kΩ. Tolerance must account for ±3% typical variation at 25°C and ±5% over temperature range.
Is the MPQ3326BGRE-AEC1-Z RoHS and halogen-free compliant?
Yes-MPQ3326BGRE-AEC1-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU. MPS confirms green status on its official quality assurance portal, with material declarations available upon request for automotive PPAP submissions.
MPQ3326BGRE-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 16V
- Voltage - Output:
- -
- Current - Output / Channel:
- 80mA
- Frequency:
- 220Hz, 250Hz, 280Hz, 330Hz
- Dimming:
- Analog, I2C, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 24-QFN (4x4)
MPQ3326BGRE-AEC1-Z FAQ
1.How can I place an order for MPQ3326BGRE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3326BGRE-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 MPQ3326BGRE-AEC1-Z reliable?
The price and inventory of MPQ3326BGRE-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 MPQ3326BGRE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ3326BGRE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3326BGRE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3326BGRE-AEC1-Z?
MPQ3326BGRE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3326BGRE-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 MPQ3326BGRE-AEC1-Z?
For technical support, including MPQ3326BGRE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3326BGRE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ3326BGRE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ3326BGRE-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 MPQ3326BGRE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ3326BGRE-AEC1-Z?
All MPQ3326BGRE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3326BGRE-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 MPQ3326BGRE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ3326BGRE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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