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Monolithic Power Systems Inc. MP2480DN-LF-P
- Part No.:
- MP2480DN-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2480DN-LF-P.pdf
- Description:
- 36V, 3A BUCK WLED DRIVER FOR BAC
- Quantity:
- Payment:
- Shipping:
Inventory:1,633
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Product details
Overview
MP2480DN-LF-P from Monolithic Power Systems is a constant-current step-down LED driver IC integrating a 4.3A high-side MOSFET, delivering up to 3A LED current with ±3% accuracy across 5V–36V input range and supporting 20kHz PWM dimming. It operates in hysteretic current-mode control without external compensation and achieves up to 95% efficiency in general lighting and LCD backlighting systems.
For engineers reviewing the MP2480DN-LF-P datasheet, MP2480DN-LF-P pinout, MP2480DN-LF-P application, or MP2480DN-LF-P equivalent, key selection criteria include its 200mV FB reference voltage, SOIC8-EP thermal pad layout, 160µA quiescent current for battery operation, and integrated short-circuit/thermal protection enabling robust high-power LED drive without output capacitor.
Technical Context
The MP2480DN-LF-P implements adaptive hysteretic current-mode control: FB pin thresholds switch between 225mV (upper) and 175mV (lower), maintaining average 200mV feedback voltage for precise LED current regulation. Its internal bootstrap regulator charges the BST–SW capacitor to ~5V, enabling gate drive for the integrated high-side MOSFET with RDS(ON) = 150mΩ at VBST–VSW = 5V.
Enable logic uses positive-input EN pin with 1.55V rising threshold and 320mV hysteresis; DIM pin supports PWM dimming with 1.15V rising threshold and 300mV hysteresis. UVLO activates below 3.6V (falling) and releases above 4.0V (rising), while thermal shutdown triggers at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 36V - accommodates 12V/24V industrial rails and automotive battery variations without pre-regulation. |
| Max LED Current | 3A - drives high-brightness LED strings (e.g., 7× white LEDs @ 350mA each) in single-stage topology. |
| FB Reference Voltage | 200mV ±25mV ripple - sets LED current via external sense resistor (e.g., 66.7mΩ for 3A) with minimal power loss. |
| Switching Frequency | Up to 2MHz - enables use of compact 47µH inductors and reduces EMI filter size in space-constrained designs. |
| Dimming Frequency | Up to 20kHz - eliminates audible noise in PWM dimming while maintaining full brightness control range. |
| Quiescent Current | 160µA - extends runtime in battery-powered signage or portable lighting where standby power matters. |
| Thermal Protection | 150°C shutdown with 20°C hysteresis - prevents permanent damage during transient overloads or poor heatsinking. |
Pinout & Package
The MP2480DN-LF-P is housed in an SOIC8-EP package with exposed thermal pad on the bottom, requiring direct connection to PCB ground plane via thermal vias for optimal junction-to-ambient thermal resistance (θJA = 50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | High-current output node connecting to cathode of Schottky rectifier; requires low-inductance layout to minimize switching spikes. |
| 2 DIM | PWM Dimming Input | Active-high digital input (1.15V threshold); floating or tied to EN for always-on operation; supports 20kHz dimming. |
| 3 EN | Enable Control | Positive-enable logic (1.55V rising threshold); internal 1µA pull-up allows floating-enable; sinking capability ≥2µA required for disable. |
| 4 GND / Exposed Pad | Power & Signal Ground | Primary return path for LED current and IC bias; exposed pad must be soldered to solid GND plane for thermal and electrical integrity. |
| 5 FB | Current Sense Feedback | Connects to low-side current-sense resistor; regulated at 200mV average; 25% ripple tolerance simplifies filtering. |
| 6 NC | No Connect | Internally unconnected; must remain unpopulated and unconnected on PCB. |
| 7 VIN | Main Power Input | Supplies control circuitry and high-side gate driver; requires local 10µF low-ESR ceramic + bulk capacitor near pin. |
| 8 BST | Bootstrap Supply | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor between BST and SW pins for stable floating rail. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic current-mode control | Eliminates external compensation network and output capacitor, reducing BOM count and layout sensitivity. |
| Integrated 4.3A high-side MOSFET | Enables single-chip 3A LED driver solution with 150mΩ RDS(ON), removing need for external switch and associated gate drive complexity. |
| ±3% LED current accuracy | Guaranteed over temperature and line variation using adaptive FB thresholds, ensuring consistent luminance in multi-unit installations. |
| 160µA quiescent current | Supports >1-year battery life in emergency exit signs or solar-powered landscape lighting with intermittent operation. |
| Short-circuit and thermal protection | Auto-retry after 300µs fault delay prevents latch-up during LED string open/short events, improving field reliability. |
Applications
| Architectural LED Strip Lighting | Automotive Interior Ambient Lighting |
|---|---|
|
Use Scenario: Driving 3A RGBW LED strips in ceiling coves and wall washers with smooth 20kHz PWM dimming. IC Role / Device Role / Timing Role: Constant-current buck controller regulating total strip current while accepting 0–100% PWM duty cycle from microcontroller. Use Value: Eliminates need for external current-sense amplifier and gate driver, reducing board area by 35% versus discrete solutions. |
Use Scenario: Powering sequential footwell and door-handle LEDs in 12V vehicle platforms with cold-crank tolerance down to 5V. IC Role / Device Role / Timing Role: High-efficiency LED driver with UVLO hysteresis (3.6V–4.0V) ensuring reliable start-up during battery voltage sag. Use Value: 95% peak efficiency minimizes heat buildup in confined door modules, avoiding thermal derating at ambient 85°C. |
| Industrial Panel Backlighting | Outdoor Advertising Signage |
|
Use Scenario: Illuminating 10″–24″ TFT displays in factory HMIs with adjustable brightness and ESD-hardened interface. IC Role / Device Role / Timing Role: Constant-current source delivering stable 2A–3A to parallel LED strings, rejecting input ripple up to 36V transients. Use Value: ±3% current matching across strings ensures uniform luminance without per-string calibration in production. |
Use Scenario: Driving high-lumen LED arrays in IP66-rated billboards exposed to wide temperature (-40°C to +85°C) and humidity. IC Role / Device Role / Timing Role: Robust LED driver with thermal shutdown (150°C) and short-circuit retry, surviving condensation-induced leakage paths. Use Value: SOIC8-EP exposed pad enables direct mounting to aluminum heatsink, sustaining 3A output continuously at 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3474EMS#TRPBF | Requires external N-channel MOSFET and compensation network; 2.5A max current; 3.3V–40V input. | Lacks integrated switch and dimming frequency headroom (max 10kHz); higher BOM cost and layout complexity. | Choose when needing higher input voltage margin (>36V) and willing to trade integration for flexibility. |
| TPS92630QPWPRQ1 | Three-channel linear LED driver; no inductor; 150mA/channel; 4.5V–40V input; AEC-Q100 qualified. | Not a switching solution - unsuitable for >1A loads due to thermal limits; targets automotive tail-light clusters, not high-power arrays. | Choose only for low-current, multi-string automotive applications requiring ASIL-B compliance. |
Compared with LT3474EMS#TRPBF and TPS92630QPWPRQ1, the MP2480DN-LF-P delivers highest integration (MOSFET + controller + protection), widest dimming bandwidth (20kHz), and lowest system-level component count for single-string 3A LED loads in industrial and commercial lighting.
Availability
MP2480DN-LF-P is available at Aetrix Electronics and suitable for architectural lighting, automotive interior modules, and industrial HMI backlighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MP2480DN-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 mixed-signal ICs for power management, motion control, and interface applications.
The MP2480 belongs to MPS's high-power LED driver product line, engineered specifically for efficient, compact, and thermally robust constant-current regulation in commercial and industrial solid-state lighting systems.
FAQ
What is the minimum input voltage required for MP2480DN-LF-P to operate reliably?
The MP2480DN-LF-P features under-voltage lockout with a falling threshold of 3.6V and rising threshold of 4.0V. It will not initiate switching below 4.0V input and remains latched off until VIN exceeds that level. This ensures stable startup across 12V battery systems experiencing cold-crank dips.
Can MP2480DN-LF-P drive multiple parallel LED strings without individual current regulation?
No - the MP2480DN-LF-P regulates total current through a single sense resistor placed in the common cathode or anode path. Driving parallel strings without per-string resistors causes current imbalance due to Vf mismatch; it is designed for single-string or series-string configurations only.
Does the FB pin require an external RC filter for noise immunity?
No - the hysteretic control architecture inherently rejects high-frequency noise on the FB pin. The datasheet specifies 25% ripple tolerance (175mV–225mV thresholds), and layout guidance emphasizes routing the FB trace away from noisy nodes rather than adding filtering components.
What is the maximum recommended PCB copper area for the exposed thermal pad?
The SOIC8-EP exposed pad should connect to a minimum 120 mm² (0.187 in²) solid GND copper area on the PCB's inner or bottom layer, using ≥9 thermal vias (15mil diameter, 40mil pitch) filled with solder to ensure θJA ≤ 50°C/W in standard 4-layer boards.
How does the MP2480DN-LF-P handle LED open-circuit faults?
During LED open-circuit, the FB voltage drops below 175mV, causing continuous high-side switch conduction until inductor current hits the 4.3A current limit. The device then shuts off for ~300µs before retrying - this auto-retry behavior prevents latch-up and enables detection via EN/DIM monitoring.
Is an external bootstrap diode necessary for standard operation?
An external bootstrap diode is optional and only recommended for specific cases: when VIN ≤ 5V, when VOUT/VIN > 65%, or when operating above 1.5MHz. For typical 12V–24V inputs driving 3A loads at <1MHz, the internal bootstrap regulator suffices.
What is the guaranteed LED current accuracy over temperature and line variation?
The MP2480DN-LF-P guarantees ±3% LED current accuracy across the full operating temperature range (-40°C to +85°C) and input voltage range (5V–36V), based on design characterization and confirmed by FB threshold stability (225mV/175mV) and RDS(ON) drift compensation.
MP2480DN-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 5V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- -
- Current - Output / Channel:
- 3A
- Frequency:
- 2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP2480DN-LF-P FAQ
1.How can I place an order for MP2480DN-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2480DN-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 MP2480DN-LF-P reliable?
The price and inventory of MP2480DN-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 MP2480DN-LF-P is usually 5 days.
3.What payment methods are accepted for MP2480DN-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2480DN-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2480DN-LF-P?
MP2480DN-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2480DN-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 MP2480DN-LF-P?
For technical support, including MP2480DN-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2480DN-LF-P requirements.
6.How does Aetrix verify that MP2480DN-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2480DN-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 MP2480DN-LF-P meets industry standards.
7.What is the process for return or replacement of MP2480DN-LF-P?
All MP2480DN-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2480DN-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 MP2480DN-LF-P part is unused and in its original packaging.
Return procedure for MP2480DN-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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