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LED2001PUR
STMicroelectronics
IC LED DRVR RGLTR PWM 4A 8VFQFPN
7026 Pcs New Original In Stock
LED Driver IC 1 Output DC DC Regulator Step-Down (Buck) PWM Dimming 4A 8-VFQFPN (4x4)
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5.0 / 5.0
- (93 Ratings)
LED2001PUR
Product Overview
8175262
DiGi Electronics Part Number
LED2001PUR-DGManufacturer
STMicroelectronics
LED2001PUR
Description
IC LED DRVR RGLTR PWM 4A 8VFQFPNInventory
7026 Pcs New Original In Stock
LED Driver IC 1 Output DC DC Regulator Step-Down (Buck) PWM Dimming 4A 8-VFQFPN (4x4)
Quantity
Minimum 1
Minimum 1
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LED2001PUR Technical Specifications
Category
Power Management (PMIC), LED Drivers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
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)
Mounting Type
Surface Mount
Package / Case
8-VQFN Exposed Pad
Supplier Device Package
8-VFQFPN (4x4)
Base Product Number
LED2001
Datasheet & Documents
HTML Datasheet
LED2001PUR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
497-13853-1
-497-13853-6
497-13853-2
-497-13853-2
-497-13853-1
497-13853-6
Standard Package
4,500
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
DiGi Electronics的客服非常專業，解答每個問題都很詳細，令人安心。
December 02, 2025
他們的物流系統設計得很人性化，使我操作方便又直觀。
December 02, 2025
I am always happy with the standardized quality and cost-effective prices here.
December 02, 2025
After-sales service is personalized and attentive to individual needs.
December 02, 2025
My orders always arrive swiftly, and their customer service team is very attentive.
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Frequently Asked Questions (FAQ)
Can the LED2001PUR safely drive high-power LED strings in outdoor signage applications where ambient temperatures exceed 85°C, and what thermal management strategies are recommended to avoid premature failure?
The LED2001PUR is rated for a junction temperature up to 150°C, making it suitable for high-temperature environments like outdoor signage, but sustained operation near this limit requires careful thermal design. Since the 8-VFQFPN package has an exposed pad, you must ensure adequate copper area on the PCB (minimum 2 in² of 2 oz copper) connected directly to the thermal pad with multiple vias. Without proper heatsinking, the device may throttle or fail under continuous 4A load at elevated ambient temperatures. Monitor PCB temperature near the IC and consider airflow or thermal relief routing if operating above 105°C ambient.
Is the LED2001PUR a drop-in replacement for the Texas Instruments TPS92512 in a 12V, 3A buck LED driver design, and what layout or compensation changes might be needed?
While both the LED2001PUR and TPS92512 are 4A-capable buck LED drivers with PWM dimming, they are not direct drop-in replacements due to differences in control architecture and compensation requirements. The LED2001PUR uses a fixed-frequency PWM scheme at 850kHz, whereas the TPS92512 employs a constant on-time control. You’ll likely need to adjust the feedback network and output capacitor selection to ensure stability, especially since the LED2001PUR’s internal compensation is optimized for specific load ranges. Also, verify that your existing inductor meets the LED2001PUR’s ripple current and saturation specs—its higher switching frequency may demand a lower DCR part.
What are the risks of using the LED2001PUR in a multi-string LED configuration where one string fails open, and how can I protect the driver and remaining LEDs from overvoltage or current imbalance?
The LED2001PUR regulates current based on a single sense resistor and assumes a continuous load path. If one LED string opens in a multi-string setup (e.g., parallel branches), the full 4A may attempt to flow through the remaining strings, risking overcurrent damage. Additionally, the output voltage can rise toward the input rail if no load is present, potentially exceeding downstream component ratings. To mitigate this, use individual current-balancing resistors per string or implement active monitoring with a supervisory circuit that disables the LED2001PUR upon fault detection. Avoid relying solely on the IC’s inherent behavior—external protection is essential for reliability in fault-prone environments.
How does the PWM dimming performance of the LED2001PUR compare to analog dimming at very low duty cycles (below 5%), and could it cause visible flicker or color shift in high-CRI lighting applications?
The LED2001PUR supports PWM dimming down to very low duty cycles, but at levels below 5%, the fixed 850kHz frequency may result in subharmonic ripple that interacts with LED junction capacitance, causing slight luminance instability or perceived flicker—especially in high-CRI or phosphor-converted white LEDs where chromaticity is sensitive to current transients. Unlike analog dimming, which maintains steady-state current, PWM at ultra-low duties can induce minor color shifts due to thermal lag in the LED package. For critical lighting applications, test dimming behavior with your specific LED model and consider adding a small DC bias (hybrid dimming) or using a higher PWM frequency externally if the application allows, though the LED2001PUR does not support frequency adjustment.
Given the LED2001PUR’s MSL 1 rating, can it be stored and assembled in a standard SMT line without dry baking, and what are the long-term reliability implications if exposed to high humidity during rework?
Yes, the LED2001PUR’s MSL 1 (unlimited floor life) rating means it can be handled in a standard SMT environment without dry packing or pre-baking, even in humid conditions. However, during rework—especially hand soldering or hot-air rework in high-humidity environments (>60% RH)—moisture trapped under the exposed pad can vaporize and cause delamination or 'popcorning' if thermal profiling is too aggressive. To ensure long-term reliability, follow STMicroelectronics’ recommended reflow profile strictly and avoid multiple rework cycles. If rework is necessary, pre-bake the entire PCB at 125°C for 1–2 hours to drive out moisture before heating, even though the IC itself doesn’t require it.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LED2001PUR CAD Models
STMicroelectronics LED2001PUR PCB symbols & footprints
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