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Monolithic Power Systems Inc. MPQ3386DR-AEC1-LF-P
- Part No.:
- MPQ3386DR-AEC1-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MPQ3386DR-AEC1-LF-P.pdf
- Description:
- IC LED DRIVER RGLTR PWM 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
MPQ3386DR-AEC1-LF-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified 6-channel white LED driver IC with integrated step-up converter, designed for automotive LCD backlighting. It delivers up to 50V output from 4.5–25V input, regulates 20mA per string with ±3% current matching, and supports selectable 1.25MHz/625kHz switching frequency and dual-mode PWM/DC dimming.
For engineers reviewing the MPQ3386DR-AEC1-LF-P datasheet, MPQ3386DR-AEC1-LF-P pinout, MPQ3386DR-AEC1-LF-P application, or MPQ3386DR-AEC1-LF-P equivalent, this device is selected for high-reliability automotive display systems requiring precise multi-string current regulation, open/short LED fault protection, and low-noise dimming control under -40°C to +125°C operation.
Technical Context
The MPQ3386DR-AEC1-LF-P integrates a fixed-frequency peak-current-mode boost controller with six matched open-drain current sinks. Its internal 5V LDO (VCC) powers gate drivers and logic, while the COMP pin enables loop compensation via external RC networks. The device uses a 600mV reference for LED current sensing and automatically selects the highest-voltage active LED string to determine bus voltage regulation.
Protection architecture includes programmable OVP (1.23V threshold at OVP pin), LEDX UVLO (175mV), thermal shutdown (150°C), and per-string mark-off for open/short faults - all implemented without external comparators. Dimming is supported via PWMI/PWMO pins with internal triangle waveform generation (fDPWM = 3.5µF/CFSET) or direct DC voltage control (0.2–1.2V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 25V - supports wide automotive battery rail variations including cold-crank transients. |
| Max Output Voltage | 50V - sufficient for driving up to 10 white LEDs in series per string (3.2V typical Vf). |
| LED Current Accuracy | ±3% matching between 6 strings - ensures uniform brightness across large-area displays without per-string calibration. |
| Switching Frequency | Selectable 1.25MHz or 625kHz - enables trade-off between compact magnetics (high-freq) and higher efficiency (low-freq). |
| Dimming Control | PWM or DC input mode - eliminates audible noise by supporting >2kHz DPWM frequencies; polarity is negative for DC mode. |
| Regulation Voltage | 600mV on LED current sources - minimizes power loss in current sinks, improving thermal performance and system efficiency. |
| OVP Threshold | Programmable via resistor divider (1.23V reference) - allows safe margin setting (e.g., 1.3× nominal VOUT) against overvoltage failure. |
| Operating Temp | -40°C to +125°C junction - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard display applications. |
Pinout & Package
MPQ3386DR-AEC1-LF-P is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with exposed thermal pad connected to GND. Pin 1 identification is marked by a dot or beveled corner per JEDEC MO-220 VGGD standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Active-high logic; must not float - ties directly to system enable rail or microcontroller GPIO. |
| 2 OSC | Frequency selection | Ground = 625kHz; floating or VCC = 1.25MHz - sets boost switching frequency without external clock source. |
| 3 FSET | DPWM frequency set | Connects to capacitor to generate internal triangle waveform (fDPWM = 3.5µF/CFSET). |
| 4 PWMO | PWM filter output / DC dimming input | Outputs filtered DC voltage from PWMI or accepts 0.2–1.2V analog signal for negative-polarity dimming control. |
| 5 GND | Analog ground reference | Reference for internal error amplifier and current sense circuitry; separate from PGND1/PGND2. |
| 6 PWMI | PWM signal input | Accepts 100Hz–50kHz square wave; internal 400kΩ pull-up enables filtering into PWMO for DC conversion. |
| 7–13 LED1–LED6 | LED string cathode outputs | Open-drain current sinks - each drives one LED string cathode; unused pins must connect to VOUT. |
| 11 ISET | Current programming input | 1.21V reference applied to external resistor (e.g., 60.4kΩ → 20mA/string); open-circuit prohibited. |
| 14 NC | No connection | Not bonded; no electrical function - must remain unconnected per datasheet. |
| 15 VOUT | Boost output node | Main high-voltage rail feeding all LED anodes; connects to output capacitor and Schottky rectifier. |
| 16 OVP | Over-voltage protection input | Resistor divider from VOUT sets trip point at 1.23V - triggers shutdown if output exceeds programmed threshold. |
| 17–18 PGND1, PGND2 | Power ground return paths | Must be shorted externally to minimize high-current loop area and reduce EMI radiation. |
| 19–20 SW1, SW2 | Internal MOSFET drain outputs | Paralleled switch nodes driving boost inductor; swing from GND to 50V - require low-inductance layout. |
| 21 VFAULT | Fault disconnection driver | Drives external PMOS to isolate input from output during fault conditions (OVP, OTP, UVLO). |
| 22 COMP | Loop compensation node | Connects external RC network to stabilize feedback loop - critical for transient response and stability. |
| 23 VIN | Main supply input | 4.5–25V input powering both IC logic and boost switch; requires local ceramic bypass (≥4.7µF). |
| 24 VCC | Internal 5V LDO output | Supplies gate drivers and control logic; bypass with ceramic cap; tie to VIN if VIN < 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from −40°C to +125°C ambient, including HTOL, TC, and ESD testing. |
| 6-string current matching | 3% max deviation between strings - achieved via matched internal current sources, eliminating need for external trimming. |
| Low 600mV LED sink voltage | Reduces conduction loss by >30% vs. typical 1V+ references - improves thermal headroom and system efficiency. |
| Integrated open/short LED protection | Detects faults within 1.6ms and marks off affected strings - maintains operation of remaining strings without full shutdown. |
| Flexible dimming interface | Supports four modes: filtered PWM, direct PWM (pos/neg logic), and DC analog - simplifies MCU or ASIC integration. |
| Programmable OVP with hysteresis | Configurable threshold (via resistor divider) plus built-in hysteresis prevents oscillation near trip point. |
Applications
| Automotive Instrument Clusters | Center Stack Infotainment Displays |
|---|---|
|
Use Scenario: High-brightness TFT-LCD backlighting in digital instrument panels exposed to wide temperature swings and vibration. IC Role / Device Role / Timing Role: Primary LED current regulator and boost controller - manages 6 parallel LED strings with real-time fault detection and thermal derating. Use Value: Ensures consistent luminance across all segments under engine-off battery drain (4.5V) and cold-start surges (25V), meeting OEM photometric specs. |
Use Scenario: Backlight for 7–10 inch capacitive touch displays in center consoles, requiring flicker-free dimming across daylight-to-night ambient conditions. IC Role / Device Role / Timing Role: Multi-string WLED driver with programmable DPWM frequency - synchronizes dimming to display frame rate to eliminate visible artifacts. Use Value: Enables >1000:1 contrast ratio via 2kHz+ DPWM without audible coil whine, satisfying UNECE R118 and ISO 16750-2 requirements. |
| Rear Seat Entertainment Screens | Head-Up Display (HUD) Light Engines |
|
Use Scenario: Compact rear-seat tablets with limited PCB space and strict EMI limits for passenger cabin compliance. IC Role / Device Role / Timing Role: Integrated boost + current regulation IC - replaces discrete boost controller + 6x current sources, reducing BOM count by 12+ components. Use Value: QFN-24 package with optimized SW/PGND layout achieves <15mVpp output ripple and passes CISPR-25 Class 5 radiated emissions. |
Use Scenario: High-luminance projection light source using RGBW LED arrays where color balance depends on precise per-string current control. IC Role / Device Role / Timing Role: String-matched current driver with fast fault response - maintains color point integrity during single-LED open failures in HUD optical path. Use Value: 3% current matching preserves white-point delta-u'v' < 0.003 across temperature, enabling HUD certification per SAE J1757-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-string WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3386GQ-AEC1-P | Same die, QFN-24 package but with wettable flank leads - improves solder joint inspection reliability for automated optical inspection (AOI). | Preferred for high-volume automotive SMT lines requiring IPC-A-610 Class 3 solder joint verification. | Select when board-level AOI capability exists and zero-defect field failure targets apply. |
| LM3409QMY/NOPB | Single-channel buck-boost LED driver with external MOSFETs - lacks integrated current matching and AEC-Q100 qualification. | Suitable only for non-automotive industrial displays where cost outweighs qualification and channel count. | Choose only if design requires >50V output or discrete FET thermal management; not drop-in compatible. |
Compared with MPQ3386GQ-AEC1-P, the MPQ3386DR-AEC1-LF-P offers identical electrical performance but prioritizes RoHS-compliant lead-free finish over wettable flanks, making it optimal for legacy SMT lines without AOI. Versus LM3409QMY/NOPB, it delivers integrated 6-string regulation and automotive qualification at lower system-level BOM cost and footprint.
Availability
MPQ3386DR-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive instrument clusters, center stack infotainment displays, and rear seat entertainment systems requiring stable component supply across extended product lifecycles.
Supply support for MPQ3386DR-AEC1-LF-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 MPQ3386 belongs to MPS's AEC-Q100-qualified LED driver product line, engineered specifically for automotive display backlighting where reliability, thermal robustness, and fault resilience are mandatory.
FAQ
What is the minimum recommended input capacitance for MPQ3386DR-AEC1-LF-P?
A 4.7µF X5R/X7R ceramic capacitor is specified for stable operation. This value ensures low impedance at both 625kHz and 1.25MHz switching frequencies, suppresses input surge currents, and prevents coupling of high-frequency noise into the supply rail. Larger values (e.g., 10µF) may improve hold-up time but do not affect regulation stability.
How does the MPQ3386DR-AEC1-LF-P handle a single open LED string during operation?
When one string opens, its LEDX pin voltage drops below 175mV, triggering automatic mark-off after OVP detection. The IC continues regulating remaining strings using the highest-voltage active string as the feedback reference, maintaining backlight output at reduced brightness without full shutdown or visible flicker.
Can the MPQ3386DR-AEC1-LF-P operate with VIN below 5.5V?
Yes - when VIN < 5.5V, the internal VCC LDO cannot regulate. In this case, VCC must be tied to VIN and supplemented with an external 5V supply. This configuration bypasses the internal regulator while preserving all control functions, enabling operation down to 4.5V input.
What is the purpose of the VFAULT pin and how is it used in a typical application?
VFAULT drives an external PMOS transistor to disconnect the input supply from the output during fault conditions (OVP, thermal shutdown, UVLO). During normal startup, it ramps up slowly over 400µs to prevent inrush current; during faults, it pulls low to turn off the PMOS and isolate the system, protecting downstream circuitry.
Is the 3% current matching specification guaranteed over temperature and lifetime?
Yes - the 3% matching is characterized from −40°C to +125°C and validated per AEC-Q100 stress tests, including 1000-hour HTOL and 1000-cycle temperature cycling. It reflects worst-case deviation across process, voltage, and temperature corners, not just typical room-temperature data.
How is the DPWM frequency calculated when using the FSET pin?
The DPWM frequency is determined by fDPWM = 3.5µF / CFSET, where CFSET is the capacitor connected from FSET to GND. For example, a 2.2nF capacitor yields fDPWM ≈ 1.6kHz. Values between 100Hz and 2kHz are recommended to avoid audible noise while ensuring smooth dimming transitions.
Does the MPQ3386DR-AEC1-LF-P support daisy-chained communication or I²C configuration?
No - the MPQ3386DR-AEC1-LF-P is a standalone analog LED driver with no digital interface. Configuration is entirely hardware-based via resistors (ISET, OVP), capacitors (FSET, CPWMO), and pin strapping (OSC). All dimming and protection functions are implemented internally without firmware or serial bus dependency.
MPQ3386DR-AEC1-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 25V
- Voltage - Output:
- 50V
- Current - Output / Channel:
- -
- Frequency:
- 1.25MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
MPQ3386DR-AEC1-LF-P FAQ
1.How can I place an order for MPQ3386DR-AEC1-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3386DR-AEC1-LF-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 MPQ3386DR-AEC1-LF-P reliable?
The price and inventory of MPQ3386DR-AEC1-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ3386DR-AEC1-LF-P is usually 5 days.
3.What payment methods are accepted for MPQ3386DR-AEC1-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3386DR-AEC1-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3386DR-AEC1-LF-P?
MPQ3386DR-AEC1-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3386DR-AEC1-LF-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 MPQ3386DR-AEC1-LF-P?
For technical support, including MPQ3386DR-AEC1-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3386DR-AEC1-LF-P requirements.
6.How does Aetrix verify that MPQ3386DR-AEC1-LF-P is sourced from the original manufacturer or authorized distributors?
All MPQ3386DR-AEC1-LF-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 MPQ3386DR-AEC1-LF-P meets industry standards.
7.What is the process for return or replacement of MPQ3386DR-AEC1-LF-P?
All MPQ3386DR-AEC1-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3386DR-AEC1-LF-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 MPQ3386DR-AEC1-LF-P part is unused and in its original packaging.
Return procedure for MPQ3386DR-AEC1-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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