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Monolithic Power Systems Inc. MPQ2483ADQ-LF-Z
- Part No.:
- MPQ2483ADQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ2483ADQ-LF-Z.pdf
- Description:
- IC LED DRVR RGLTR PWM 2.5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,416
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Product details
Overview
MPQ2483ADQ-LF-Z from Monolithic Power Systems is an AEC-Q100-qualified, industrial-grade 55V, 2.5A peak-current LED driver supporting buck and inverting buck-boost topologies. It integrates analog/PWM dimming on a single EN/DIM pin, features 0.198V feedback reference, 0.28Ω internal MOSFET, and full protection including OVP, SCP, open-string detection, and thermal shutdown. Used in automotive headlamps and LCD backlighting with wide 4.5V–55V input range.
For engineers reviewing the MPQ2483ADQ-LF-Z datasheet, MPQ2483ADQ-LF-Z pinout, MPQ2483ADQ-LF-Z application, or MPQ2483ADQ-LF-Z equivalent, key selection criteria include programmable switching frequency (250kHz–1.7MHz), dual-mode topology support, integrated dimming control, and AEC-Q100 qualification for automotive lighting systems.
Technical Context
The MPQ2483ADQ-LF-Z operates in current-mode control with cycle-by-cycle peak current limiting and slope compensation for stable loop dynamics across duty cycles up to 90%. Its error amplifier regulates LED current via a 0.198V reference at FB, while COMP pin supports soft-start and PWM dimming through external capacitor coupling.
It implements dual dimming: DC dimming via 0.7V–1.4V EN/DIM voltage sweep (0–100% LED current), and PWM dimming using 100Hz–2kHz square waves >1.4V referenced to INGND. The RSET pin sets oscillator frequency from 250kHz (RSET = 200kΩ) to 1.35MHz (RSET open), with foldback to 250kHz during short-circuit fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Peak Current | 2.5A - supports high-brightness LED strings up to 2A continuous output with margin for transient surges. |
| Input Voltage Range | 4.5V to 55V - enables direct operation from 12V/24V/48V automotive and industrial rails without pre-regulation. |
| Feedback Reference | 0.198V ±2% - defines LED current accuracy via external sense resistor; enables <1% current tolerance with 0.5% RSENSE. |
| Switch RDS(ON) | 0.28Ω - reduces conduction loss in high-current paths; enables >90% efficiency at 1A output in buck configuration. |
| Oscillator Frequency | 250kHz to 1.7MHz - adjustable via RSET; higher frequencies allow smaller magnetics; default 1.35MHz when RSET open. |
| Dimming Interface | Single EN/DIM pin - accepts both analog voltage (0.7–1.4V) and PWM (100Hz–2kHz) signals; eliminates need for external logic or DAC. |
| Protection Features | OVP (1.2V threshold), SCP (foldback mode), open-string detection, thermal shutdown (150°C), and cycle-by-cycle OCP - ensures robust field operation without external supervision. |
Pinout & Package
MPQ2483ADQ-LF-Z is housed in a thermally enhanced 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed VSS pad for low-θJA (50°C/W). Pin 1 is marked by index area; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Main power input (4.5–55V); requires local 4.7µF ceramic decoupling near pin to suppress switching transients. |
| 2 | VSS | Power return and feedback reference; connects to exposed pad; must be star-grounded away from noisy SW node. |
| 3 | OVP | Over-voltage monitor input; sets OVP threshold (0.4–1.2V) via resistor divider; triggers shutdown if >1.2V. |
| 4 | FB | Current-sense feedback node; regulated at 0.198V; connects to bottom of LED string via sense resistor. |
| 5 | COMP | Error amplifier output; requires ≥1nF capacitor to ground for loop stability, soft-start, and PWM dimming filtering. |
| 6 | RSET | Frequency programming pin; resistor-to-VSS sets fSW; open = 1.35MHz; 200kΩ = 250kHz; bypass with 1nF cap. |
| 7 | EN/DIM | Combined enable/dimming input; 0.6V turn-on threshold; 0.7–1.4V analog dimming range; >1.4V enables full PWM dimming. |
| 8 | INGND | Independent input ground reference; isolates EN/DIM signal from power ground noise; critical for accurate dimming linearity. |
| 9 | BST | Bootstrap supply for high-side gate drive; requires 100nF ceramic cap between BST and SW for reliable MOSFET turn-on. |
| 10 | SW | Internal switch drain output; connects to inductor and Schottky rectifier cathode; carries high di/dt switching current. |
Key Features
| Feature | Design Value |
|---|---|
| Buck & inverting buck-boost topology support | Enables flexible LED string configuration-step-down for 12V systems or buck-boost for wide-input automotive applications where VIN may dip below VLED. |
| Integrated analog + PWM dimming on one pin | Reduces BOM count and PCB space; eliminates need for external dimming controllers or level-shifters in cost-sensitive automotive modules. |
| AEC-Q100 Grade 1 qualification (-40°C to +125°C) | Validated for under-hood automotive use; includes stress testing for temperature cycling, HTOL, and ESD per AEC standard. |
| Stable with low-ESR ceramic capacitors | Eliminates requirement for electrolytic or tantalum output caps; supports compact, long-life designs with X5R/X7R ceramics (e.g., 2.2µF). |
| Separate INGND reference for EN/DIM | Prevents ground bounce from power switching from corrupting dimming commands-critical for flicker-free operation in camera-facing lighting. |
Applications
| Automotive Headlamp Control | LCD Backlight Driver |
|---|---|
Use Scenario: High-intensity discharge (HID) or LED-based forward lighting in passenger vehicles, requiring precise current regulation and thermal derating over -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Primary LED current controller in constant-current buck-boost stage; manages dimming transitions during adaptive driving beam (ADB) sequencing. Use Value: AEC-Q100 qualification and 55V input withstand capability ensure reliability during load-dump events (ISO 7637-2 Pulse 5a); 2.5A peak supports multi-LED arrays without external current sharing. |
Use Scenario: Edge-lit or direct-lit LCD panels in infotainment displays and instrument clusters, demanding uniform brightness and minimal EMI. IC Role / Device Role / Timing Role: Constant-current source for white LED strings; uses programmable 250kHz–1.7MHz switching to balance efficiency vs. EMI filter size. Use Value: Single-pin dimming simplifies MCU interface; low 0.198V reference minimizes sense resistor power loss (<10mW at 1A), improving thermal budget in sealed enclosures. |
| Industrial Machine Vision Lighting | Commercial Signage Illumination |
Use Scenario: High-speed strobed lighting for barcode readers and automated optical inspection systems, requiring microsecond-level dimming response and repeatable pulse fidelity. IC Role / Device Role / Timing Role: Fast-transient current regulator with cycle-by-cycle current limiting; supports PWM dimming up to 2kHz with <1% duty-cycle error. Use Value: Current-mode architecture delivers <500ns current rise/fall times; built-in short-circuit foldback prevents damage during frequent LED hot-plug events in factory-floor environments. |
Use Scenario: Outdoor LED signage powered from 24V/48V DC distribution, subject to wide temperature swings and voltage sags during grid fluctuations. IC Role / Device Role / Timing Role: Robust LED driver operating in buck mode across 4.5–55V input; provides open-string protection to prevent system failure when individual LEDs fail open. Use Value: 0.28Ω RDS(ON) and thermal shutdown (150°C) enable continuous 2A operation in passive-cooled enclosures; RoHS/lead-free compliance meets global environmental regulations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2483ADS-LF-Z | SOIC-14 package (θJA = 86°C/W vs. QFN's 50°C/W); same electrical specs and pinout mapping except NC pins differ. | Preferred for prototyping or low-volume manual assembly; less suitable for thermally constrained automotive PCBs. | Select when board space allows larger footprint and thermal design accommodates lower power density. |
| MPQ2483ADQ-AEC1-Z | Identical QFN-10 package and electrical performance, but certified to AEC-Q100 Grade 0 (-40°C to +150°C) instead of Grade 1. | Required for engine bay or transmission-mounted lighting where junction temperature exceeds 125°C. | Choose only when Grade 0 qualification is mandated by OEM thermal requirements; otherwise MPQ2483ADQ-LF-Z suffices. |
Compared with MPQ2483ADS-LF-Z, the MPQ2483ADQ-LF-Z offers superior thermal performance and smaller footprint for production automotive modules; versus MPQ2483ADQ-AEC1-Z, it trades Grade 0 qualification for lower cost and broader availability while meeting most headlamp and interior lighting thermal profiles.
Availability
MPQ2483ADQ-LF-Z is available at Aetrix Electronics and suitable for automotive lighting, LCD backlighting, and industrial machine vision systems requiring stable component supply, AEC-Q100 compliance, and high-current LED regulation.
Supply support for MPQ2483ADQ-LF-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 analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and motor control solutions.
The MPQ2483A product line targets automotive and industrial LED lighting applications, designed to replace discrete driver solutions with integrated, AEC-Q100-qualified ICs that reduce system size, improve reliability, and simplify thermal management.
FAQ
What is the minimum recommended RSET value for stable operation?
The datasheet recommends RSET between 20kΩ and 200kΩ to set switching frequency from ~1.35MHz down to 250kHz. Values below 20kΩ risk instability due to excessive frequency and reduced noise margin; no minimum is specified, but 20kΩ is the practical lower bound confirmed in characterization.
Can MPQ2483ADQ-LF-Z drive LEDs in boost-only configuration?
No-it supports buck and inverting buck-boost modes only. In buck-boost, the LED string connects between VSS and the cathode of the external Schottky diode, with polarity referenced to VSS. True non-inverting boost (LED anode to VIN) is not supported per functional block diagram and application circuits.
How does open-string protection behave during startup?
At startup, if no LED string is connected, FB remains near 0V. The controller increases duty cycle until OVP pin voltage reaches 1.2V, triggering shutdown. Recovery occurs only after OVP voltage drops below hysteresis threshold (~1.14V), preventing latch-up and enabling auto-retry on valid string connection.
Is the 0.198V feedback reference trimmed at production?
Yes-the datasheet specifies 0.170V to 0.220V over full input and temperature range, with typical 0.198V at 25°C. This is a factory-trimmed bandgap reference; no external calibration is required, and tolerance directly impacts LED current accuracy when used with standard sense resistors.
What is the maximum continuous LED current achievable?
While peak current is rated at 2.5A, continuous output is limited by thermal design. With proper PCB copper area and airflow, 2A is sustainable in buck mode at 25°C ambient; above 35% duty cycle, derating to 1.8A is recommended per application note guidance to maintain <125°C junction temperature.
Does EN/DIM support true 0–100% linear dimming?
Yes-when driven with analog voltage from 0.7V to 1.4V (referenced to INGND), LED current scales linearly from 0% to 100% of maximum set by RSENSE. Below 0.7V the device is off; above 1.4V it delivers full current. Linearity is verified across temperature and input voltage in typical performance curves.
Why is INGND separate from VSS?
INGND provides a clean reference for EN/DIM signals, isolating dimming control from high di/dt power ground noise. This prevents false dimming commands caused by VSS voltage spikes during switching, ensuring flicker-free operation-especially critical in camera-adjacent lighting applications.
MPQ2483ADQ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 55V
- Voltage - Output:
- -
- Current - Output / Channel:
- 2.5A
- Frequency:
- 250kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MPQ2483ADQ-LF-Z FAQ
1.How can I place an order for MPQ2483ADQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2483ADQ-LF-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 MPQ2483ADQ-LF-Z reliable?
The price and inventory of MPQ2483ADQ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2483ADQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ2483ADQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2483ADQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2483ADQ-LF-Z?
MPQ2483ADQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2483ADQ-LF-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 MPQ2483ADQ-LF-Z?
For technical support, including MPQ2483ADQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2483ADQ-LF-Z requirements.
6.How does Aetrix verify that MPQ2483ADQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2483ADQ-LF-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 MPQ2483ADQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ2483ADQ-LF-Z?
All MPQ2483ADQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2483ADQ-LF-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 MPQ2483ADQ-LF-Z part is unused and in its original packaging.
Return procedure for MPQ2483ADQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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