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STMicroelectronics LED2001PHR
- Part No.:
- LED2001PHR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
LED2001PHR.pdf
- Description:
- IC LED DRIVER RGLTR PWM 4A 8HSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,477
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Product details
Overview
LED2001PHR 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 DC output current, 3–18 V input range, 850 kHz fixed switching frequency, and ±7% output current accuracy with 100 mV typical sense voltage.
For engineers reviewing the LED2001PHR datasheet, LED2001PHR pinout, LED2001PHR application, or LED2001PHR equivalent, this device is selected for PWM-dimmable LED driver designs requiring tight current regulation, thermal robustness, ceramic-capacitor compatibility, and integrated protection against overcurrent, short-circuit, and junction overheating up to 150 °C.
Technical Context
The LED2001PHR implements a peak current mode control architecture with an embedded 850 kHz sawtooth oscillator, transconductance error amplifier (220 µS, internally compensated), and dedicated PWM dimming circuitry that disables switching or modulates duty cycle via the DIM pin. It features pulse-by-pulse current limiting and soft-start with 1 ms ramp time.
Its synchronous rectification uses integrated high-side (95 mΩ RDS(on)) and low-side (69 mΩ RDS(on)) MOSFETs, while the FB pin regulates current via external sense resistor with 97 mV typical reference voltage at 25 °C and 100 mV at 125 °C. Thermal shutdown activates at 150 °C with 15 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 18 V - supports wide-range industrial and automotive LED power rails without pre-regulation. |
| Switching Frequency | 850 kHz fixed - enables compact magnetics and EMI filter design; stable across line/load/temperature. |
| Current Sense Voltage | 97 mV typ. at 25 °C - sets precise LED current with minimal power loss in sensing resistor (e.g., 25 mΩ for 4 A). |
| Output Current Accuracy | ±7% - ensures consistent brightness across temperature (-40 to +125 °C) and unit-to-unit variation. |
| RDS(on) HS / LS | 95 mΩ / 69 mΩ typ. - reduces conduction loss and improves efficiency in high-current LED strings. |
| Thermal Shutdown Threshold | 150 °C with 15 °C hysteresis - prevents latch-up during transient overload; allows safe recovery after cooling. |
| PWM Dimming Support | Dedicated DIM pin with 1.2 V enable threshold - enables direct microcontroller GPIO control of LED brightness without external circuitry. |
Pinout & Package
LED2001PHR is housed in a VFQFPN 4×4 mm 8-lead package with exposed pad (EP), optimized for thermal dissipation in high-power LED driver layouts. The exposed pad must be connected to AGND for electrical and thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_A (Pin 1) | Analog supply input | Provides clean bias for internal analog blocks (error amp, reference, oscillator); decoupling required near pin. |
| DIM (Pin 2) | PWM dimming control | Logic-high enables switching; square wave modulates LED current; logic-low halts switching and initiates fast discharge via LS FET. |
| FB (Pin 3) | Current sense feedback | Connects to low-side of external sense resistor; regulates average LED current by holding voltage at ~97 mV. |
| AGND (Pin 4) | Analog ground | Reference for analog circuitry; must be star-connected to PGND at single point to avoid noise coupling into FB path. |
| PGND (Pin 8) | Power ground | Return path for high-current switch node (SW) and low-side FET; requires low-inductance layout to minimize ringing. |
| SW (Pin 7) | Switch node | Drives external inductor; experiences full VIN-to-GND swing at 850 kHz; critical for EMI and layout optimization. |
| VIN_SW (Pin 6) | Power input for switches | Supplies high-side and low-side FETs; accepts same 3–18 V input as VIN_A but carries high di/dt current. |
| EP (Exposed Pad) | Thermal & ground connection | Must be soldered to large copper pour tied to AGND; primary thermal path-reduces θJA to 40 °C/W (VFQFPN). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 95 mΩ HS / 69 mΩ LS MOSFETs eliminate external diode loss, enabling >90% efficiency at 4 A with ceramic output caps. |
| Embedded compensation network | RC = 70 kΩ, CC = 195 pF - stabilizes loop without external components; achieves 14 kHz crossover and 120° phase margin in typical 2-LED string. |
| Ceramic capacitor compliance | Stable with low-ESR MLCCs (e.g., 2.2 µF) - avoids electrolytic bulk caps, improving lifetime and reducing board area. |
| Fast PWM dimming discharge | Active low-side discharge during DIM low - pulls LED current to 60% of nominal within microseconds, minimizing trailing edge delay. |
| Integrated protection suite | Thermal shutdown (150 °C), pulse-by-pulse current limit (5.6 A), and output short-circuit detection - eliminates need for external fault management logic. |
Applications
| Architectural Lighting | Automotive Exterior Lighting |
|---|---|
|
Use Scenario: Linear LED strips in retail display walls and museum accent lighting requiring uniform brightness and smooth 100–1000 Hz PWM dimming. IC Role / Device Role / Timing Role: Constant-current buck regulator with synchronized dimming control and thermal derating for enclosed fixtures. Use Value: ±7% current accuracy maintains color consistency across 20+ LEDs per string; 850 kHz switching minimizes visible beat frequencies with ambient AC lighting. |
Use Scenario: Tail lamp and DRL modules in vehicles where EMC compliance, thermal reliability, and CAN-synchronized dimming are mandatory. IC Role / Device Role / Timing Role: Primary LED current controller interfacing with vehicle microcontroller via DIM pin; operates across 5–16 V battery range. Use Value: Integrated current limit and thermal shutdown meet ISO 16750-2 transient and thermal stress requirements; VFQFPN package passes AEC-Q100 reflow profile. |
| Commercial Signage | Industrial Machine Vision Illumination |
|
Use Scenario: High-lumen channel letters and backlit signage operating 24/7 in outdoor enclosures with ambient temperatures up to 85 °C. IC Role / Device Role / Timing Role: High-efficiency current source driving 3–6 series LEDs per channel, with programmable dimming depth down to 2%. Use Value: 150 °C thermal shutdown with 15 °C hysteresis prevents thermal runaway in sealed housings; 95/69 mΩ RDS(on) sustains >88% efficiency at full load. |
Use Scenario: Stroboscopic LED arrays in automated optical inspection systems requiring microsecond-level current rise/fall times for motion-blur-free imaging. IC Role / Device Role / Timing Role: Precision current driver synchronized to camera trigger signal via DIM pin; optimized for minimal TRISE (~20 µs) and TFALL (~5 µs). Use Value: Dedicated low-side discharge during DIM low enables sub-10 µs current decay; ceramic capacitor compatibility ensures repeatable timing across temperature. |
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 |
|---|---|---|---|
| LM3409HVMM/NOPB | Asynchronous (external Schottky), 1.25 V FB reference, no integrated dimming logic - requires external PWM gate driver. | Higher BOM count and lower efficiency due to diode loss; suitable only where cost dominates over thermal performance. | Select when budget constraints outweigh efficiency and layout simplicity; verify external diode SOA under 4 A continuous. |
| MPQ4425AGU-A | 4 A sync buck LED driver, but 1.2 V FB reference and no dedicated DIM pin - dimming requires external transistor or MCU-controlled EN pin. | Lacks native PWM dimming interface; thermal shutdown at 165 °C offers less margin in sealed enclosures. | Choose if existing design already uses MPQ4425 footprint; confirm FB divider network meets 1.2 V reference tolerance for ±7% current accuracy. |
Compared with LM3409HVMM/NOPB and MPQ4425AGU-A, LED2001PHR delivers superior integration (single-pin dimming, embedded compensation, 100 mV sense), tighter current accuracy over temperature, and lower thermal resistance - making it optimal for space-constrained, thermally demanding LED systems.
Availability
LED2001PHR is available at Aetrix Electronics and suitable for architectural lighting, automotive exterior lighting, and commercial signage requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LED2001PHR 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, specializing in power management, analog, and automotive-grade ICs with vertical manufacturing and AEC-Q100 qualification capabilities.
The LED2001 product line targets high-reliability LED current regulation in thermally constrained environments, emphasizing integrated protection, ceramic-capacitor compatibility, and seamless PWM dimming for industrial and transportation lighting.
FAQ
What is the recommended minimum output capacitance for stable operation?
The LED2001PHR is certified for stability with ≥2.2 µF X7R/X5R ceramic capacitors (e.g., 0805 or 1206 case). Lower values risk instability under light load or fast dimming transitions; larger values degrade PWM falling-edge response. Avoid tantalum or aluminum electrolytics due to ESR-induced loop peaking.
Can the DIM pin be driven directly by a 3.3 V microcontroller GPIO?
Yes - the DIM pin has a 1.2 V logic-high threshold and draws only 2 µA, making it compatible with standard 3.3 V or 5 V CMOS outputs. No level-shifting is needed. Ensure GPIO slew rate exceeds 1 V/µs to avoid false triggering during noise events.
How does the device handle output short-circuit conditions?
Under output short, the LED2001PHR enters hiccup mode: current limiting triggers at 5.6 A, then thermal shutdown activates if sustained. After cooldown, soft-start restarts automatically. No latch-up occurs, and the 150 °C shutdown threshold protects internal MOSFETs even during prolonged fault.
Is the exposed pad (EP) electrically connected to any internal node?
Yes - the exposed pad is internally connected to AGND and serves as the primary thermal and electrical return path for analog ground. It must be soldered to a dedicated AGND copper pour (≥100 mm²) with ≥4 thermal vias to inner ground planes; floating or misconnected EP causes regulation drift and thermal failure.
LED2001PHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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):
- 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-HSOP
LED2001PHR FAQ
1.How can I place an order for LED2001PHR through Aetrix?
Please submit a Request for Quotation (RFQ) for LED2001PHR 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 LED2001PHR reliable?
The price and inventory of LED2001PHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LED2001PHR is usually 5 days.
3.What payment methods are accepted for LED2001PHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LED2001PHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LED2001PHR?
LED2001PHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LED2001PHR 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 LED2001PHR?
For technical support, including LED2001PHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LED2001PHR requirements.
6.How does Aetrix verify that LED2001PHR is sourced from the original manufacturer or authorized distributors?
All LED2001PHR 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 LED2001PHR meets industry standards.
7.What is the process for return or replacement of LED2001PHR?
All LED2001PHR units undergo pre-shipment inspection (PSI). If there is an issue with LED2001PHR, 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 LED2001PHR part is unused and in its original packaging.
Return procedure for LED2001PHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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