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Monolithic Power Systems Inc. MP2480DN-LF-Z
- Part No.:
- MP2480DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2480DN-LF-Z.pdf
- Description:
- IC LED DRIVER RGLTR PWM 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,463
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Product details
Overview
MP2480DN-LF-Z 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-Z datasheet, MP2480DN-LF-Z pinout, MP2480DN-LF-Z application, or MP2480DN-LF-Z equivalent, key selection considerations include its 200mV feedback reference, SOIC8-EP thermal pad layout, integrated short-circuit and thermal shutdown protection, and bootstrap capacitor dependency for high-side gate drive.
Technical Context
The MP2480DN-LF-Z implements adaptive hysteretic current-mode control: FB pin thresholds switch between 175mV (low) and 225mV (high), maintaining average regulation at 200mV with 25% ripple. Its internal UVLO activates at 4.0V (rising) and releases at 3.6V (falling), ensuring stable startup above 5V nominal input.
Enable logic uses positive-threshold control (1.55V enable, 1.23V disable, 320mV hysteresis); DIM pin accepts 0.8–1.5V logic for 20kHz PWM dimming. The BST pin requires an external capacitor tied to SW to sustain floating gate drive for the integrated 150mΩ RDS(ON) MOSFET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 36V - supports 12V/24V industrial rails and automotive battery-supplied lighting without pre-regulation. |
| LED Output Current | Up to 3A - set via external RFB; enables direct drive of high-power LED strings (e.g., 7× white LEDs @ 350mA). |
| Feedback Reference | 200mV ±25mV hysteresis - defines current-sense resistor value (e.g., 66.7mΩ for 3A) with minimal drift over temperature. |
| Switching Frequency | Up to 2MHz - permits use of compact 47µH inductors and reduces EMI filter size in space-constrained designs. |
| Quiescent Current | 160µA - enables battery-backed emergency lighting or always-on signage with low standby power loss. |
| Thermal Protection | 150°C shutdown with 20°C hysteresis - prevents latch-up during transient overloads; exposed pad must connect to PCB GND plane. |
| Dimming Support | 20kHz PWM - eliminates audible noise in indoor lighting while maintaining full brightness control down to 0.1% duty cycle. |
Pinout & Package
MP2480DN-LF-Z is housed in an SOIC8-EP package with an exposed thermal pad on the bottom surface, requiring solder connection to a dedicated GND copper pour for thermal dissipation (θJA = 50°C/W, θJC = 10°C/W). Pin 4 (GND) and the exposed pad must be electrically and thermally tied to the same ground plane.
| 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 suppress voltage spikes. |
| 2 DIM | PWM Dimming Input | Logic-level input (0.8–1.5V threshold) enabling direct microcontroller PWM control without external level-shifting. |
| 3 EN | Enable Input | Positive-enable pin with 1.55V rising threshold; floats to ~3V internally-no pull-up needed for default operation. |
| 4 GND / Exposed Pad | Power & Signal Ground | Primary return path for LED current and IC bias; exposed pad must be soldered to ≥4 thermal vias to inner GND plane. |
| 5 FB | Current Sense Feedback | Connects to low-side current-sense resistor; regulates LED current by comparing voltage against 200mV reference band. |
| 6 NC | No Connect | Internally unconnected-must remain unpopulated and unconnected on PCB. |
| 7 VIN | Main Supply Input | Accepts 5–36V DC; requires local 10µF low-ESR ceramic + bulk electrolytic capacitor within 5mm of pin. |
| 8 BST | Bootstrap Supply | Drives high-side MOSFET gate; requires 0.1µF ceramic capacitor between BST and SW pins for proper floating bias generation. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic current control | Eliminates loop compensation components and enables sub-1µs transient response to load changes. |
| Integrated 150mΩ high-side MOSFET | Reduces BOM count and PCB area vs. external switch solutions; rated for 4.3A peak current. |
| No output capacitor required | LED ripple remains ≤15% of DC current without COUT, simplifying layout and lowering cost in basic applications. |
| 200mV precision feedback reference | Enables accurate current setting with standard 1% resistors; typical ±3% LED current accuracy over line/load/temp. |
| SOIC8-EP thermal pad | Supports 2.5W continuous power dissipation at 25°C ambient when properly mounted-critical for 3A LED loads. |
Applications
| Architectural Lighting | Automotive Interior Lighting |
|---|---|
|
Use Scenario: Linear LED strips mounted in ceiling coves or wall channels for ambient illumination in commercial buildings. IC Role / Device Role / Timing Role: Constant-current buck controller regulating multi-segment 24V LED arrays with synchronized 20kHz PWM dimming. Use Value: Delivers flicker-free, silent dimming across wide input range while maintaining ±3% current matching between parallel strings. |
Use Scenario: Footwell, map light, and dome lighting modules in passenger vehicles powered from 12V battery rail. IC Role / Device Role / Timing Role: High-efficiency LED driver with UVLO (4.0V) and thermal shutdown (150°C) for reliable operation under cold-cranking and cabin heat. Use Value: 160µA quiescent current prevents battery drain during vehicle sleep mode; SOIC8-EP package withstands automotive thermal cycling. |
| LCD Backlight Driver | Industrial Status Indicators |
|
Use Scenario: Edge-lit LCD panels in medical displays and industrial HMIs requiring uniform brightness and analog/PWM dimming. IC Role / Device Role / Timing Role: Single-chip solution driving 6–10 series white LEDs from 24V supply with 20kHz PWM dimming interface. Use Value: 2MHz switching frequency allows miniature 47µH inductors, reducing board footprint and EMI filtering requirements. |
Use Scenario: High-brightness status indicators on PLC I/O modules, motor drives, and safety-rated control panels. IC Role / Device Role / Timing Role: Robust constant-current source powering red/green/blue LEDs under variable 12–36V industrial power bus conditions. Use Value: Integrated short-circuit protection and 36V absolute max input tolerate load dump transients; ±3% current ensures consistent visual intensity. |
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 |
|---|---|---|---|
| LT3474EFE#TRPBF | Fixed 1.3MHz frequency, requires external compensation, no integrated MOSFET (external N-channel needed), higher IQ (1.1mA) | Requires more external components and larger PCB area; better suited for ultra-low-noise applications where fixed frequency matters | Select when precise EMI frequency control is mandatory and thermal constraints allow discrete FET layout. |
| TPS92630QPWPRQ1 | Automotive-grade AEC-Q100, 3-channel independent current regulation, I²C programmable, no integrated high-side switch | Designed for multi-zone automotive lighting with diagnostics; lacks single-channel simplicity and integrated FET of MP2480 | Choose for ASIL-B compliant systems needing channel independence and fault reporting-not for cost-sensitive single-string lighting. |
Compared with LT3474EFE#TRPBF and TPS92630QPWPRQ1, MP2480DN-LF-Z offers lowest BOM count and smallest footprint for single-string 3A LED applications, trading programmability and automotive qualification for integration and thermal efficiency in commercial lighting.
Availability
MP2480DN-LF-Z is available at Aetrix Electronics and suitable for architectural lighting, LCD backlighting, and industrial status indicators requiring stable component supply, RoHS-compliant packaging, and SOIC8-EP thermal reliability.
Supply support for MP2480DN-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, headquartered in Kirkland, Washington, with global design and support centers.
The MP2480 belongs to MPS's high-power LED driver product line, engineered specifically for efficient, compact, and thermally robust constant-current regulation in general lighting and display backlighting applications.
FAQ
What is the minimum input voltage required for MP2480DN-LF-Z to start switching?
The device incorporates under-voltage lockout (UVLO) with a rising threshold of 4.0V and hysteresis of 0.4V. It begins normal operation only when VIN rises above 4.0V and remains enabled until VIN drops below 3.6V. Stable regulation starts at 5V per datasheet operating conditions.
Can MP2480DN-LF-Z drive LEDs in a high-side configuration?
No-it is a buck (step-down) controller with an integrated high-side N-channel MOSFET, meaning the LED string must be connected between the output (SW node) and ground, with current sensed on the low-side FB pin. High-side sensing or floating-load configurations are not supported.
How is LED current accuracy affected by temperature?
The FB reference thresholds (175mV–225mV) exhibit typical drift of ±10mV over –40°C to +85°C ambient, contributing to overall ±3% LED current accuracy. The adaptive threshold adjustment circuit compensates for propagation delays, maintaining tight regulation across temperature.
Is an external bootstrap diode necessary for reliable operation?
An external diode (e.g., BAT54) from a stable 5V rail to BST is recommended when VIN ≤ 5V, VOUT/VIN > 65%, or switching frequency exceeds 1.5MHz. It ensures sufficient gate drive voltage for the high-side MOSFET under high-duty-cycle conditions.
What failure protections does MP2480DN-LF-Z provide?
It integrates thermal shutdown (150°C trip, 130°C release), LED short-circuit protection (current-limit retry every ~300µs), and input UVLO. The high-side MOSFET also features 4.3A current limit and 40V absolute maximum VSW rating to withstand inductive kickback.
Does MP2480DN-LF-Z require an output capacitor for stable operation?
No-its hysteretic control architecture inherently limits LED current ripple to ≤15% of DC value without COUT. An output capacitor may be added solely to further reduce ripple or suppress EMI, but it is not required for regulation stability or loop control.
MP2480DN-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- 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 (Switch)
- Frequency:
- 2MHz
- Dimming:
- PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP2480DN-LF-Z FAQ
1.How can I place an order for MP2480DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2480DN-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 MP2480DN-LF-Z reliable?
The price and inventory of MP2480DN-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 MP2480DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2480DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2480DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2480DN-LF-Z?
MP2480DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2480DN-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 MP2480DN-LF-Z?
For technical support, including MP2480DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2480DN-LF-Z requirements.
6.How does Aetrix verify that MP2480DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2480DN-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 MP2480DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2480DN-LF-Z?
All MP2480DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2480DN-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 MP2480DN-LF-Z part is unused and in its original packaging.
Return procedure for MP2480DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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