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Monolithic Power Systems Inc. MPQ3369GF-AEC1-Z
- Part No.:
- MPQ3369GF-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MPQ3369GF-AEC1-Z.pdf
- Description:
- IC LED DRIVER RGLTR PWM 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,960
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Product details
Overview
MPQ3369GF-AEC1-Z from Monolithic Power Systems is an AEC-Q100 qualified 6-channel boost white LED driver with I²C interface, peak-current-mode PWM control, and 15,000:1 PWM dimming ratio at ≤200Hz. It delivers up to 100mA per channel with 2.5% inter-channel current matching, internal 100mΩ/50V MOSFET, and operates from 3.5V–36V input for automotive display backlighting.
For engineers reviewing the MPQ3369GF-AEC1-Z datasheet, MPQ3369GF-AEC1-Z pinout, MPQ3369GF-AEC1-Z application, or MPQ3369GF-AEC1-Z equivalent, key selection criteria include its TSSOP28-EP package, phase-shift PWM dimming capability, programmable OVP/STH thresholds, and support for analog/PWM/mix dimming modes with fault flag output.
Technical Context
The MPQ3369GF-AEC1-Z implements peak-current-mode control for the boost converter and uses six independent cathode-connected current sinks to regulate LED string current. Its I²C interface configures dimming mode (MODE1:0), phase-shift enable (PSE), mix-dimming transfer point (MIXFR), and channel enable (CH2:0).
It integrates a 5V LDO (VCC) for internal logic and gate drive, supports external sync via FREQ/SYNC, and employs frequency spread spectrum (FSP pin) to reduce EMI. Protection includes cycle-by-cycle current limit, OVP (programmable via resistor divider), OTP (170°C shutdown), LED short/open detection, and optional auto-decrement of LED current above temperature threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports wide automotive battery range including cold-crank transients. |
| Max Output Current per Channel | 100mA - enables driving high-brightness WLED strings in mid-size LCD panels. |
| Current Matching Accuracy | ±2.5% - ensures uniform brightness across all 6 LED strings without external calibration. |
| PWM Dimming Ratio | 15,000:1 at fPWM ≤ 200Hz - achieves deep dimming for high-contrast automotive displays. |
| Switching Frequency Range | 495kHz to 2.2MHz - selectable via resistor, I²C, or external clock to optimize efficiency vs. EMI. |
| Dimming Modes | Analog, PWM, and mix dimming - mix mode provides 25%/12.5% transfer points to eliminate audible noise. |
| Package | TSSOP28-EP - thermally enhanced exposed-pad package with θJA = 32°C/W for automotive thermal environments. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C TJ) - qualified for under-hood and instrument cluster applications. |
Pinout & Package
MPQ3369GF-AEC1-Z is housed in a thermally enhanced TSSOP28-EP package (9.7mm × 4.4mm × 1.2mm) with exposed thermal pad connected to AGND. Pin numbering follows standard TSSOP orientation (pin 1 top-left, counterclockwise).
| 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. |
| MIX/AD (Pin 6) | Dimming mode select | 18μA current source; resistor sets voltage to select analog (≥1.0V), PWM (0.5–0.8V), or mix (≤0.3V) dimming. |
| FREQ/SYNC (Pin 7) | Switching frequency control | Resistor-to-GND sets fSW; external clock input synchronizes boost switching for EMI reduction. |
| EN (Pin 8) | Enable/disable control | Active-high; pulls low to enter shutdown (ISHDN = 1μA); enables soft-start sequence on rising edge. |
| SCL/PSE & SDA/PSE (Pins 9 & 10) | I²C interface + phase-shift enable | When tied together and pulled to 0.75–1.0V, activates phase-shift function to stagger 6-channel PWM timing and suppress inrush noise. |
| ISET (Pin 13) | LED current reference | Connects external resistor to AGND; sets full-scale current (e.g., 50mA with 24.9kΩ) with 1.2V reference. |
| LED1–LED6 (Pins 15–20) | LED string cathode current sinks | Each sinks up to 100mA; unused channels disabled by grounding corresponding pin or CH2:0 register. |
| OVP (Pin 25) | Over-voltage protection threshold | Resistor divider from VOUT to GND programs OVP trip point (typ. 2.0V at pin → ~40V at VOUT). |
| FF (Pin 11) | Fault flag output | Open-drain; pulled low during OCP, OVP, OTP, LED open/short, or inductor short events. |
| VIN (Pin 3) & VCC (Pin 28) | Main supply & internal LDO output | VIN powers IC and boost stage (3.5–36V); VCC = 5V LDO output for internal logic/gate drive (requires local 1μF ceramic cap). |
Key Features
| Feature | Design Value |
|---|---|
| Phase-shift PWM dimming | Staggers turn-on timing across enabled LED channels (60° for 6 strings, 90° for 4) to reduce peak input current and eliminate audible coil whine. |
| Programmable LED short threshold | STH pin (18μA current source) allows resistor-based adjustment of short-detection sensitivity-critical for detecting partial LED shorts in long strings. |
| Frequency spread spectrum (FSS) | FSP pin controls jitter depth; spreads switching energy over ±1% bandwidth to lower peak EMI emissions without compromising regulation. |
| Auto-decrement LED current at high temp | Optional thermal derating reduces ILED as junction temperature rises-preserves reliability in sealed automotive enclosures without external sensors. |
| Multi-mode dimming with transfer points | Mix dimming switches between analog (high-duty) and PWM (low-duty) at 25% or 12.5% duty-enables smooth, noise-free dimming down to 0.005%. |
| Robust fault handling | Dedicated FF pin asserts low on any fault; SD pin drives external PMOS to disconnect VIN during critical faults (OVP, short, OTP). |
Applications
| Automotive Instrument Cluster | Center Stack Infotainment Display |
|---|---|
|
Use Scenario: High-reliability backlight for TFT-LCD gauges operating across −40°C to +105°C ambient with EMC compliance requirements. IC Role / Device Role / Timing Role: 6-channel constant-current sink regulating parallel WLED strings; I²C-configured mix dimming eliminates flicker and audio noise during night-mode transitions. Use Value: 15,000:1 dim ratio enables seamless adaptation from daylight to pitch-black cabin lighting while maintaining AEC-Q100 Grade 1 qualification. |
Use Scenario: Backlight for 10.25" capacitive touchscreen in vehicle center console, requiring EMI suppression and thermal resilience near HVAC ducts. IC Role / Device Role / Timing Role: Boost controller with phase-shift PWM dimming and FSS; synchronizes switching to system clock via FREQ/SYNC pin to avoid beat frequencies. Use Value: TSSOP28-EP package with θJA = 32°C/W sustains 100mA/channel operation at 125°C junction temperature; FF pin feeds fault status to MCU for diagnostic logging. |
| Automotive HUD Combiner Panel | Commercial Vehicle Rearview Monitor |
|
Use Scenario: Compact, high-luminance backlight for reflective HUD combiner glass where space and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Drives 6 short LED strings with precise current matching; analog dimming mode used for fine-grained brightness control during daytime operation. Use Value: 2.5% current matching ensures uniform luminance across optical field; 200:1 analog dim ratio complements PWM for glare-free daytime HUD intensity tuning. |
Use Scenario: Ruggedized rearview monitor for trucks/buses exposed to vibration, wide temperature swings, and 24V battery transients. IC Role / Device Role / Timing Role: LED driver with OVP (programmed to 42V), UVLO hysteresis (100mV), and inductor short protection-survives load-dump and jump-start conditions. Use Value: Internal 100mΩ MOSFET and low-headroom design achieve >90% efficiency at 12V input; SD pin controls external PMOS to isolate faulty board from main power rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-channel automotive WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3369GR-AEC1-Z | Same die, QFN-24 (4mm×4mm) package with θJA = 42°C/W - lower thermal performance than TSSOP28-EP. | Better suited for space-constrained PCBs where thermal mass is provided externally; less optimal for sustained 100mA/channel in sealed enclosures. | Select GR variant only when board layout prohibits TSSOP28 footprint or when thermal vias cannot be implemented under exposed pad. |
| LM3409QMYX/NOPB | Single-channel, external-FET controller; no integrated MOSFET, no I²C, no multi-string current matching. | Requires discrete current sinks per string and external MCU for dimming coordination - increases BOM count and firmware complexity. | Choose only for legacy designs requiring proven TI controller architecture or when channel count flexibility (1–6 strings) outweighs integration benefits. |
Compared with MPQ3369GF-AEC1-Z, the GR variant trades thermal performance for compactness, while the LM3409Q requires external components and software to replicate integrated features like phase shift, mix dimming, and fault flag reporting - increasing design risk and validation effort.
Availability
MPQ3369GF-AEC1-Z is available at Aetrix Electronics and suitable for automotive instrument clusters, center-stack infotainment displays, HUD combiner panels, and commercial vehicle rearview monitors requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MPQ3369GF-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 converters, LED drivers, and motor drivers for automotive, industrial, and consumer markets.
The MPQ3369-AEC1 product line targets automotive display backlighting, delivering high-efficiency, low-EMI, and ultra-deep dimming capabilities in AEC-Q100 qualified packages for instrument clusters and infotainment systems.
FAQ
What is the maximum allowable LED string voltage for MPQ3369GF-AEC1-Z?
The device regulates output voltage based on the highest forward voltage among active LED strings. With 50V-rated internal MOSFET and OVP threshold programmable up to ~40V (via OVP pin resistor divider), the practical max string voltage is 36V at 125°C junction temperature, verified per absolute maximum ratings and typical performance curves.
How does the phase-shift function reduce audible noise during PWM dimming?
By staggering the turn-on timing of LED channels (e.g., 60° apart for 6 strings), phase shift distributes inrush current peaks across time, lowering peak input current magnitude and eliminating mechanical resonance in inductors and capacitors that cause audible coil whine at sub-20kHz frequencies.
Can MPQ3369GF-AEC1-Z drive fewer than six LED strings?
Yes - unused LEDx pins (e.g., LED6 for 5-string config) can be grounded to auto-disable the channel during startup, or disabled via I²C register CH2:0. The device automatically selects the minimum required VOUT to power only active strings, improving efficiency and reducing stress on the boost stage.
What is the role of the STH pin, and how is it configured?
STH is a 18μA current-source output used to set the LED short-protection threshold voltage. A resistor from STH to AGND determines the trip point (e.g., 100kΩ → 1.8V at STH → ~18V LED short detection). Floating STH defaults to internal register TH_S1:0 = 00 (1.0V at pin → ~10V detection).
Does MPQ3369GF-AEC1-Z support synchronization to an external clock?
Yes - the FREQ/SYNC pin accepts an external clock signal (CMOS level) to synchronize the boost converter's switching frequency. This eliminates beat frequencies in multi-driver systems and simplifies EMI filter design by fixing the fundamental switching harmonic location.
How is over-voltage protection (OVP) triggered and reset?
OVP triggers when the voltage at the OVP pin exceeds the programmed threshold (e.g., 2.0V), causing immediate shutdown and FF pin assertion. Recovery requires cycling EN or issuing I²C command to clear fault latch - no automatic retry to prevent damage during persistent over-voltage conditions.
What thermal derating applies above 125°C junction temperature?
Thermal shutdown activates at 170°C (TST), but optional LED current auto-decrement begins below that threshold. When enabled, ILED linearly decreases from 100% at 125°C to 0% at 170°C - configurable via I²C register to match enclosure thermal profile without external sensor feedback.
MPQ3369GF-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- 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:
- 5V
- Current - Output / Channel:
- 100mA
- Frequency:
- 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
MPQ3369GF-AEC1-Z FAQ
1.How can I place an order for MPQ3369GF-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3369GF-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 MPQ3369GF-AEC1-Z reliable?
The price and inventory of MPQ3369GF-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 MPQ3369GF-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ3369GF-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3369GF-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3369GF-AEC1-Z?
MPQ3369GF-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3369GF-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 MPQ3369GF-AEC1-Z?
For technical support, including MPQ3369GF-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3369GF-AEC1-Z requirements.
6.How does Aetrix verify that MPQ3369GF-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ3369GF-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 MPQ3369GF-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ3369GF-AEC1-Z?
All MPQ3369GF-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3369GF-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 MPQ3369GF-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ3369GF-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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