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STMicroelectronics LED2001PUR
- Part No.:
- LED2001PUR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 8-VQFN Exposed Pad
- Datasheet:
-
LED2001PUR.pdf
- Description:
- IC LED DRVR RGLTR PWM 4A 8VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:26,567
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Product details
Overview
LED2001PUR from STMicroelectronics is a monolithic synchronous step-down DC-DC converter configured as a precision constant-current source for high-brightness LED driving, supporting up to 4 A output current, 3–18 V input range, 850 kHz fixed switching frequency, ±7% current accuracy, and PWM dimming control. It integrates high-side (95 mΩ) and low-side (69 mΩ) MOSFETs and operates in peak current mode with embedded compensation.
For engineers reviewing the LED2001PUR datasheet, LED2001PUR pinout, LED2001PUR application, or LED2001PUR equivalent, key selection criteria include its 100 mV current-sense threshold, thermal shutdown at 150 °C, VFQFPN 4×4 mm 8-lead package, and compatibility with ceramic output capacitors for compact lighting designs.
Technical Context
The LED2001PUR implements a peak current mode control architecture with a fixed 850 kHz oscillator, transconductance error amplifier referenced to 100 mV, and internal slope compensation to prevent sub-harmonic oscillation above 50% duty cycle. Its soft-start duration is 1 ms typ., and it features pulse-by-pulse overcurrent protection with 5.6 A limiting threshold.
Dimming is implemented via logic-level DIM pin control: high enables switching and PWM brightness modulation; low disables switching and activates active discharge of the output capacitor via the low-side FET with –1 A typical negative current limit. The device embeds UVLO, thermal shutdown (150 °C ±10 °C, 15 °C hysteresis), and internal voltage regulation for analog and power circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 18 V - supports wide-range industrial and automotive LED systems without external pre-regulation. |
| Output Current Accuracy | ±7% - ensures consistent LED brightness across temperature and line/load variations. |
| Current Sense Voltage | 97 mV typ. (100 mV nominal) - enables precise current setting with low-power, low-value sense resistors (e.g., 25 mΩ for 4 A). |
| Switching Frequency | 850 kHz fixed - allows small external inductors and ceramic output capacitors, reducing board area and EMI filter size. |
| RDS(on) HS / LS | 95 mΩ / 69 mΩ typ. - minimizes conduction loss and improves efficiency in high-current LED strings. |
| Thermal Shutdown | 150 °C with 15 °C hysteresis - protects against sustained overload or poor heatsinking while enabling safe recovery. |
| Dimming Control | Digital PWM on DIM pin - enables flicker-free brightness control without external gate drivers or timing components. |
Pinout & Package
LED2001PUR is housed in a thermally enhanced VFQFPN 4×4 mm 8-lead package with exposed pad (EP) connected to AGND. The package supports high-power dissipation (RthJA = 40 °C/W) and compact PCB layout for LED driver modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_A (Pin 1) | Analog supply input | Powers internal bias, reference, and error amplifier circuitry; decoupled separately from power rail. |
| DIM (Pin 2) | Digital dimming enable | Logic-high enables switching and PWM dimming; logic-low disables switching and triggers active COUT discharge. |
| FB (Pin 3) | Current sense feedback | Connects to sensing resistor; regulated at 100 mV to set precise LED current (ILED = 0.1 V / RS). |
| AGND (Pin 4) | Analog ground | Reference return for FB, DIM, and internal analog blocks; must be star-connected to minimize noise coupling. |
| NC (Pin 5) | No connect | Not internally bonded - left floating or tied to AGND per layout best practice. |
| VIN_SW (Pin 6) | Power input for switch stage | Supplies high-side/low-side FETs and SW node; requires local high-frequency ceramic decoupling. |
| SW (Pin 7) | Switch node | Connects to inductor and catch diode (if used); critical for EMI and layout; minimized loop area essential. |
| PGND (Pin 8) | Power ground | Return path for high-current switching paths; separated from AGND and joined at single point near EP. |
| EP (Exposed Pad) | Thermal & ground connection | Mandatory connection to AGND plane for thermal performance and electrical stability; soldered for mechanical and thermal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 95 mΩ HS / 69 mΩ LS MOSFETs eliminate external diode losses and improve efficiency >90% at full load. |
| Embedded compensation network | RC = 70 kΩ, CC = 195 pF - eliminates external compensation components and ensures stable operation with standard LC filters. |
| Ceramic capacitor compliance | Stable with low-ESR MLCCs - enables compact, low-profile designs without electrolytic capacitors or associated reliability concerns. |
| Active dimming discharge | Low-side FET remains active during DIM low to discharge COUT - reduces LED current fall time and prevents ghosting in fast-PWM applications. |
| Robust protection suite | Includes thermal shutdown (150 °C), pulse-by-pulse overcurrent (5.6 A), UVLO, and output short-circuit immunity - ensures field reliability in unattended lighting systems. |
Applications
| Architectural LED Signage | Commercial Retail Lighting |
|---|---|
Use Scenario: High-density RGB LED modules in indoor/outdoor digital signage requiring uniform brightness and smooth dimming across thousands of pixels. IC Role / Device Role / Timing Role: Constant-current buck regulator providing precise 4 A drive per channel with synchronized PWM dimming for color fidelity and frame-rate alignment. Use Value: ±7% current accuracy and 850 kHz switching ensure minimal inter-channel brightness variation and reduced EMI filtering cost in tightly packed PCBs. | Use Scenario: Adjustable-track LED spotlights in retail stores where beam angle, CCT, and intensity are tuned per display zone. IC Role / Device Role / Timing Role: Primary current source for multi-LED strings, accepting 0–10 V or PWM dimming inputs via microcontroller interface. Use Value: Active COUT discharge during DIM low enables <5 µs LED current fall time - critical for high-frequency dimming without visible flicker or halo artifacts. |
| Industrial Machine Vision Lighting | Halogen Replacement Modules |
Use Scenario: Stroboscopic LED arrays in automated inspection systems requiring microsecond-level current turn-on/turn-off for motion freeze imaging. IC Role / Device Role / Timing Role: Fast-response constant-current source synchronized to camera trigger signals via DIM pin, operating in burst-mode at 1–10 kHz. Use Value: 1 ms soft-start and optimized loop bandwidth support rapid, repeatable current transients without overshoot or ringing - preserving image contrast and sensor dynamic range. | Use Scenario: Retrofit GU10 or E27 LED lamps replacing 35–50 W halogen bulbs in residential and hospitality settings. IC Role / Device Role / Timing Role: Integrated buck current controller eliminating external MOSFETs and gate drivers, enabling single-layer PCB designs with minimal BOM count. Use Value: VFQFPN 4×4 mm package and ceramic capacitor compatibility reduce module height to <12 mm - meeting mechanical constraints of standard lamp housings. |
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 |
|---|---|---|---|
| LM3409MH/NOPB | Asynchronous buck controller (external HS FET), 1.25 V FB reference, no integrated dimming logic | Requires external MOSFET, gate driver, and PWM generator; higher BOM count and layout complexity | Select when higher voltage (>60 V) or custom topology (e.g., SEPIC) is needed; not drop-in for LED2001PUR footprint or control interface. |
| MPQ4425AGU-AEC1-P | 4 A synchronous buck LED driver, 100 mV FB, but rated only to 36 VIN, AEC-Q100 qualified, no active discharge on DIM low | Designed for automotive ambient lighting; lacks dedicated COUT discharge path for fast dimming fall time | Select for automotive-grade reliability and extended temp range; avoid where sub-10 µs LED current fall time is required. |
Compared with LM3409MH/NOPB and MPQ4425AGU-AEC1-P, LED2001PUR uniquely combines integrated synchronous FETs, 100 mV precision current sense, active DIM-driven COUT discharge, and VFQFPN packaging - making it optimal for space-constrained, high-dimming-performance commercial and industrial LED modules.
Availability
LED2001PUR is available at Aetrix Electronics and suitable for architectural LED signage, commercial retail lighting, industrial machine vision illumination, and halogen bulb replacement modules requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for LED2001PUR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering innovative solutions across automotive, industrial, power, and analog markets with vertical manufacturing and broad IP portfolio.
The LED2001 series belongs to ST's high-efficiency LED driver product line, designed specifically for precision constant-current regulation in high-brightness, thermally demanding lighting applications - emphasizing integration, thermal robustness, and dimming fidelity.
FAQ
What is the recommended minimum output capacitance for stable operation?
The LED2001PUR is certified for use with ceramic output capacitors ≥1 µF. For 4 A output with ≤2% ripple, ST recommends 2.2 µF X7R/X5R MLCCs with <5 mΩ ESR. Smaller values (e.g., 0.47 µF) are acceptable for fast dimming but require careful loop compensation verification per Section 6.3 of DS9524.
Can the LED2001PUR drive multiple parallel LED strings?
No - the LED2001PUR regulates total output current, not per-string current. Driving parallel strings without individual current balancing risks thermal runaway. It is intended for single-string configurations or series-connected LEDs only. For multi-string applications, use one LED2001PUR per string or add external current-mirror circuitry.
How does the DIM pin behave during thermal shutdown?
During thermal shutdown, the DIM pin retains its logic state but switching is forcibly disabled regardless of DIM level. Once junction temperature falls below 135 °C (150 °C – 15 °C hysteresis), the device automatically resumes operation if DIM is high. No external reset is required.
Is an external compensation network ever required?
No - the LED2001PUR embeds a fully optimized compensation network (RC = 70 kΩ, CC = 195 pF) validated for stability with standard LC filters. External compensation is unnecessary and discouraged; adding components may destabilize the loop or degrade dimming response per Section 6.3 of the datasheet.
LED2001PUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-VQFN 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):
- 3V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- 4A
- Frequency:
- 850kHz
- Dimming:
- PWM
- Applications:
- Lighting, Signage
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VFQFPN (4x4)
LED2001PUR FAQ
1.How can I place an order for LED2001PUR through Aetrix?
Please submit a Request for Quotation (RFQ) for LED2001PUR 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 LED2001PUR reliable?
The price and inventory of LED2001PUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LED2001PUR is usually 5 days.
3.What payment methods are accepted for LED2001PUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LED2001PUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LED2001PUR?
LED2001PUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LED2001PUR 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 LED2001PUR?
For technical support, including LED2001PUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LED2001PUR requirements.
6.How does Aetrix verify that LED2001PUR is sourced from the original manufacturer or authorized distributors?
All LED2001PUR 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 LED2001PUR meets industry standards.
7.What is the process for return or replacement of LED2001PUR?
All LED2001PUR units undergo pre-shipment inspection (PSI). If there is an issue with LED2001PUR, 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 LED2001PUR part is unused and in its original packaging.
Return procedure for LED2001PUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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