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Monolithic Power Systems Inc. MP2488DN-LF
- Part No.:
- MP2488DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2488DN-LF.pdf
- Description:
- IC LED DRIVER RGLTR PWM 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,209
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Product details
Overview
MP2488DN-LF from Monolithic Power Systems is a fixed-frequency, peak-current-mode step-down LED driver IC integrating a 220mΩ high-side 55V MOSFET, delivering up to 2A constant current to high-power LED strings. It operates from 4.5V–55V input, features 200mV reference for precise current regulation, programmable 200kHz switching frequency via external resistor, and thermal shutdown protection. Used in automotive headlight modules requiring stable current under wide battery voltage swings.
For engineers reviewing the MP2488DN-LF datasheet, MP2488DN-LF pinout, MP2488DN-LF application, or MP2488DN-LF equivalent, key selection criteria include its 2A output capability, 55V input rating, SOIC8E exposed-pad thermal performance, 130µA quiescent current in active operation, and compatibility with PWM dimming control in lighting systems.
Technical Context
The MP2488DN-LF implements peak-current-mode control with a 200mV internal reference voltage applied to the FB pin, enabling accurate LED current regulation independent of input voltage variation. Its error amplifier delivers 400V/V gain and 350µA/V transconductance, driving an external RC compensation network on the COMP pin to stabilize the current loop.
Switching frequency is set by an external resistor (RFREQ) from FREQ to GND, supporting 150–250kHz operation; the internal oscillator includes blanking and minimum on/off time constraints (100ns each) to ensure reliable cycle-by-cycle current limiting. The integrated high-side MOSFET has 220mΩ RDS(ON) and 3.2A current limit, with bootstrap charging managed via BST–SW capacitor and internal floating regulator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports full automotive battery range including cold-crank (6V) and load-dump (55V) conditions. |
| Max Output Current | 2A - delivered as constant current to LED string via external sense resistor and FB feedback loop. |
| Switching Frequency | Up to 200kHz - programmable via RFREQ; avoids AM radio band and enables compact magnetics. |
| Reference Voltage | 200mV ±6% - sets LED current accuracy (ILED = 0.2V / RFB) with low drift over temperature. |
| RDS(ON) | 220mΩ - reduces conduction loss at 2A, enabling >97% efficiency in typical 12V→36V LED configurations. |
| Quiescent Current | 130µA - enables low standby power in always-on lighting systems without compromising regulation speed. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die during sustained overload or poor heatsinking in enclosed fixtures. |
Pinout & Package
MP2488DN-LF uses SOIC8 with exposed thermal pad (SOIC8E), providing 2.5W power dissipation at +25°C ambient and θJA = 50°C/W. The exposed pad must be soldered to a PCB ground plane for optimal thermal performance and EMI reduction.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | Drives external Schottky diode; high dv/dt node requiring tight layout to minimize EMI and ringing. |
| 2 EN | Enable Input | Positive-logic control: ≥1.5V enables IC; ≤1.2V disables with 12µA shutdown current. |
| 3 COMP | Error Amplifier Output | Connects external RC compensation network (RCOM/CCOM1) to stabilize current loop dynamics. |
| 4 FB | Current Sense Input | Compares voltage across RFB to 200mV reference; determines regulated LED current magnitude. |
| 5 GND | Power & Signal Ground | Primary return path; exposed pad must be connected to solid GND plane for thermal and noise control. |
| 6 FREQ | Frequency Set Input | Resistor-to-ground sets fSW; 495kΩ yields 200kHz per fS = 100000/(RFREQ – 5). |
| 7 VIN | Main Supply Input | Powers internal regulators and high-side gate driver; requires local 10µF ceramic decoupling. |
| 8 BST | Bootstrap Supply | Charges via internal PMOS from VIN during SW low phase; powers floating high-side driver. |
Key Features
| Feature | Design Value |
|---|---|
| Ceramic capacitor stable | Supports low-ESR ceramic input/output caps without oscillation risk-reduces BOM count and board area. |
| Internal soft-start | 0.18ms ramp prevents LED current overshoot at startup and short-circuit recovery. |
| 200mV reference voltage | Minimizes ILED sensing loss (vs. 1V+ references), improving efficiency in high-current, low-Vf LED arrays. |
| Exposed pad package | SOIC8E enables 2.5W power handling in standard footprint-no redesign needed when upgrading from non-exposed SOIC8. |
| UVLO with hysteresis | 3.0V rising / 2.6V falling threshold prevents erratic operation during battery brownout or slow power-up. |
Applications
| Automotive Headlights | Industrial High-Bay Lighting |
|---|---|
|
Use Scenario: Constant-current driver for 12–36V LED arrays in sealed headlamp housings with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Primary LED current controller using peak-current-mode regulation and thermal foldback to maintain luminance during engine-off battery drain. Use Value: 2A output and 55V input withstand load-dump transients; 130µA quiescent current extends parking-light runtime. |
Use Scenario: Multi-string LED driver in warehouse ceiling fixtures powered from 24–48V DC distribution rails. IC Role / Device Role / Timing Role: Fixed-frequency buck controller regulating current to parallel LED strings with PWM dimming interface. Use Value: Programmable 200kHz switching avoids audible noise; SOIC8E package simplifies thermal management on metal-core PCBs. |
| Commercial Street Lighting | Emergency Exit Sign Illumination |
|
Use Scenario: Outdoor LED lamp operating from solar-charged 36V battery banks with wide temperature (-40°C to +85°C) and humidity exposure. IC Role / Device Role / Timing Role: Robust current source with UVLO and thermal shutdown ensuring fail-safe operation during grid outage or extreme ambient shifts. Use Value: 4.5V–55V input range accommodates deep-discharge battery recovery; 97.5% peak efficiency reduces thermal stress in sealed enclosures. |
Use Scenario: Battery-backed LED illumination module requiring ultra-low standby power and rapid enable/disable response. IC Role / Device Role / Timing Role: Low-quiescent-current LED driver activated by building fire alarm signal via EN pin. Use Value: 12µA shutdown current extends 3-year battery life; 1.5V EN threshold ensures clean activation from TTL-level control signals. |
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 |
|---|---|---|---|
| MPQ2488DN-AEC1 | AEC-Q100 Grade 1 qualified; identical electrical specs but rated for -40°C to +125°C junction temperature. | Required for automotive front-lighting where ambient exceeds +85°C or reliability validation is mandated. | Select when automotive qualification and extended temperature operation are mandatory; otherwise MP2488DN-LF suffices. |
| LT3474EMS#TRPBF | 2.5A max output; 3.5V–40V input; 1.25V reference; requires external MOSFET; higher quiescent current (1.1mA). | Better suited for higher-current, lower-input-voltage designs where discrete FET flexibility outweighs integration trade-offs. | Choose only if >2A output or <4.5V minimum input is required; MP2488DN-LF offers superior integration and efficiency below 2A. |
Compared with MPQ2488DN-AEC1, the MP2488DN-LF lacks automotive qualification but matches all electrical performance and thermal specs for industrial/commercial use; versus LT3474EMS, it integrates the power switch and lowers quiescent current by 99%, reducing system-level heat and battery drain.
Availability
MP2488DN-LF is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, commercial street lamps, and emergency exit signage requiring stable component supply across long production lifecycles.
Supply support for MP2488DN-LF 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 MP2488 belongs to MPS's high-voltage LED driver product line, designed specifically for constant-current regulation in automotive, industrial, and architectural lighting where wide input range, thermal robustness, and high efficiency are critical.
FAQ
What is the maximum LED string voltage supported by MP2488DN-LF?
The MP2488DN-LF does not regulate output voltage directly-it regulates LED current. Maximum string voltage is limited by the 55V input rating minus forward drop across the external Schottky diode and inductor DCR. With 55V input and 0.4V diode drop, up to ~54V LED string voltage is achievable in continuous conduction mode.
Can MP2488DN-LF drive multiple parallel LED strings?
No-MP2488DN-LF is a single-channel constant-current controller. Driving parallel strings without individual current regulation causes mismatch due to Vf variation, risking thermal runaway. For multi-string designs, use one MP2488DN-LF per string or select a multi-channel IC like MP4688.
How is PWM dimming implemented with MP2488DN-LF?
PWM dimming is achieved by applying a logic-level square wave to the EN pin. The IC fully enables/disables the switching regulator at the PWM frequency. Minimum off-time is 100ns, supporting dimming frequencies up to 20kHz without visible flicker while maintaining stable current regulation during ON periods.
What is the purpose of the BST pin and required external components?
The BST pin supplies gate drive voltage to the internal high-side MOSFET. A 10nF–100nF ceramic capacitor must connect between BST and SW pins to provide charge storage during high-side conduction. This capacitor is recharged through the internal bootstrap regulator when SW is low, enabling efficient floating gate drive.
Does MP2488DN-LF require an external current-sense resistor?
Yes-an external precision resistor (RFB) is mandatory between the LED cathode and GND. The FB pin senses voltage across this resistor; with a 200mV internal reference, LED current is calculated as ILED = 0.2V / RFB. Typical values range from 100mΩ (2A) to 1Ω (200mA).
Is the SOIC8E package RoHS-compliant and lead-free?
Yes-MP2488DN-LF suffix "-LF" explicitly denotes lead-free, RoHS-compliant packaging. The SOIC8E package uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements for standard SMT assembly.
What failure protections are built into MP2488DN-LF?
MP2488DN-LF includes thermal shutdown (150°C trip, 130°C release), input UVLO (2.6V–3.0V hysteresis), cycle-by-cycle current limiting (3.2A peak), and bootstrap UVLO (2.2V). All protections are fully autonomous-no external circuitry required for safe operation under fault conditions.
MP2488DN-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 55V
- Voltage - Output:
- -
- Current - Output / Channel:
- 2A
- Frequency:
- 200kHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP2488DN-LF FAQ
1.How can I place an order for MP2488DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2488DN-LF 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 MP2488DN-LF reliable?
The price and inventory of MP2488DN-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2488DN-LF is usually 5 days.
3.What payment methods are accepted for MP2488DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2488DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2488DN-LF?
MP2488DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2488DN-LF 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 MP2488DN-LF?
For technical support, including MP2488DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2488DN-LF requirements.
6.How does Aetrix verify that MP2488DN-LF is sourced from the original manufacturer or authorized distributors?
All MP2488DN-LF 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 MP2488DN-LF meets industry standards.
7.What is the process for return or replacement of MP2488DN-LF?
All MP2488DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP2488DN-LF, 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 MP2488DN-LF part is unused and in its original packaging.
Return procedure for MP2488DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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